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Papers by Ahmed El-Zeiny

Research paper thumbnail of Review of Land-Use Impacts on Surface Water Quality in Egypt

Journal of the Indian Society of Remote Sensing

Deterioration of surface water quality in Egypt is one of the consequences of destructive land-us... more Deterioration of surface water quality in Egypt is one of the consequences of destructive land-use activities. The present article aims to review and highlight the research studies that were conducted to assess surface water quality in Egypt taking into account surrounding land uses and various anthropogenic activities. Different surface water bodies in Egypt were considered including River Nile, Lakes, Suez Canal, Mediterranean Sea, Red Sea and main irrigation canals. Water quality studies in Egypt depend on assessing physical, chemical and biological characteristics using different kinds of data and methods. Field observation, sampling, laboratory analyses, water quality indices, principle component analyses, remote sensing and GIS are the most common methods used in surface water quality assessment studies in Egypt. Discharge of contaminated water from urbanized, agricultural and industrial areas in addition to oil seepage from shipping, particularly in harbors, represents the main reasons of surface water quality degradation in Egypt. To conserve surface water and improve its quality in Egypt, it is highly recommended to provide sufficient wastewater treatment plants and control land-use changes and all associated activities. The Egyptian government initiated several projects and programs for improving surface water quality (Egypt Vision 2030).

Research paper thumbnail of Update, Conclusions, and Recommendations of “Environmental Remote Sensing in Egypt”

Environmental Remote Sensing in Egypt

The current chapter highlights the main conclusions and recommendations of the chapters presented... more The current chapter highlights the main conclusions and recommendations of the chapters presented in the book. Also, some findings from recently published research works related to the Environmental Remote Sensing in Egypt are discussed. This chapter contains information on remote sensing applications in the field of environmental applications. The topics covered in the book include: environmental applications of remote sensing, radar remote sensing applications, monitoring changes in natural ecosystems, groundwater exploration, monitoring and protection of Egyptian Northern Lakes, environmental hazards threatening Lake Nasser, oil pollution in the Mediterranean and Red Seas, modeling of climate changes, land degradation and desertification, landscapes of Egypt, bathymetry modeling, sediment capacity, shoreline dynamics, monitoring of the Nile River. In addition, a set of recommendations for future research work is pointed out to direct the future research towards the importance of using advanced remote sensing techniques in the field of environment for the sake of its sustainability and protection.

Research paper thumbnail of Geo-environmental monitoring of coastal and land resources of Port Said Governorate, Egypt

The Egyptian Journal of Remote Sensing and Space Science

Research paper thumbnail of Wild Plant Habitat Characterization in the Last Two Decades in the Nile Delta Coastal Region of Egypt

Agriculture

Environmental and land-use changes put severe pressure on wild plant habitats. The present study ... more Environmental and land-use changes put severe pressure on wild plant habitats. The present study aims to assess the biodiversity of wild plant habitats and the associated spatiotemporal environmental changes in the coastal region of Dakahlia Governorate following an integrated approach of remote sensing, GIS, and samples analysis. Thirty-seven stands were spatially identified and studied to represent the different habitats of wild plants in the Deltaic Mediterranean coastline region. Physical and chemical characteristics of soil samples were examined, while TWINSPAN classification was used to identify plant communities. Two free Landsat images (TM and OLI) acquired in 1999 and 2019 were processed to assess changes via the production of land use and cover maps (LULC). Moreover, NDSI, NDMI, and NDSI indices were used to identify wild plant habitats. The floristic composition indicated the existence of 57 species, belonging to 51 genera of 20 families. The largest families were Asterac...

Research paper thumbnail of Species Composition and Relative Abundance of Mosquito Larvae in Suez Canal Zone, Egypt

Asian Journal of Biology, Jan 10, 2017

Research paper thumbnail of Environmental and Stress Analysis of Wild Plant Habitat in River Nile Region of Dakahlia Governorate on Basis of Geospatial Techniques

Sustainability

Spatiotemporal environmental changes lead to disturbances in wild plant habitats, particularly in... more Spatiotemporal environmental changes lead to disturbances in wild plant habitats, particularly in regions characterized by changeable land use and cover. The present study aims to characterize wild plant habitats in the River Nile region of Dakahlia Governorate using a multidisciplinary approach, incorporating remote sensing, GIS and sampling analyses. Twenty-four stands representing the wild plant habitats in the River Nile region were geographically identified, sampled and analyzed. Water and soil samples were investigated for physical and chemical characteristics. Two calibrated multispectral Landsat images dated 1999 and 2019 were processed to produce LULC, NDSI, NDMI and NDSI to characterize wild plan habitats. The floristic composition showed the presence of 64 species belonging to 53 genera and 28 families. Ecologically, the recorded plant species in the present work can be classified into four main categories, which are separated into three communities according to the TWINS...

Research paper thumbnail of Mapping mosquito larval densities and assessing area vulnerable to diseases transmission in Nile valley of Giza, Egypt

The Egyptian Journal of Remote Sensing and Space Science

Research paper thumbnail of Modeling Water Quality Parameters Using Landsat Multispectral Images: A Case Study of Erlong Lake, Northeast China

Remote Sensing

Erlong Lake is considered one of the largest lakes in midwest Jilin, China, and one of the drinki... more Erlong Lake is considered one of the largest lakes in midwest Jilin, China, and one of the drinking water resources in neighboring cities. The present study aims to explore the usage of Landsat TM5, ETM7, and OLI8 images to assess water quality (V-phenol, dissolved oxygen (DO), NH4-N, NO3-N) in Erlong Lake, Jilin province, northeast China. Thirteen multispectral images were used in this study for May, July, August, and September in 2000, 2001, 2002, and October 2020. Radiometric and atmospheric corrections were applied to all images. All in situ water quality parameters were strongly correlated to each other, except DO. The in situ measurements (V-phenol, dissolved oxygen, NH4-N, NO3-N) were statistically correlated with various spectral band combinations (blue, green, red, and NIR) derived from Landsat imagery. Regression analysis reported that there are strong relationships between the estimated and retrieved water quality from the Landsat images. Moreover, in calibrations, the hi...

Research paper thumbnail of Integration of lab analyses and GIS techniques for assessment of some physical and chemical characteristics in different water bodies, Damietta coastal region, Egypt

1. Abstract In this research, integration between field work, lab analyses and GIS has been utili... more 1. Abstract In this research, integration between field work, lab analyses and GIS has been utilized for assessing and mapping some physical and chemical characteristics in different water bodies at Damietta coastal region. Regular sampling method was used for collecting thirty water samples from five different connected water bodies in the area of study (i.e. Mediterranean Sea, Manzala Lagoon, River Nile, Irrigation and drainage canals). Studied water characteristics include pH, turbidity, total dissolved solids (TDS), ammonia, dissolved oxygen (DO), biological oxygen demand (BOD) and chemical oxygen demand (COD). Chemical characteristics of water samples were determined according to the standard method. GIS kriging method was used for mapping these characteristics in which the standardized mean ranged from 0.0080 to -0.0874 while the RMSS ranged from 0.8868 to 1.3607. A GIS vector layer of all water bodies has been used for masking the mapped parameter in order to display it only ...

Research paper thumbnail of Species Composition and Relative Abundance of Mosquito Larvae in Suez Canal Zone, Egypt

Research paper thumbnail of Water quality assessment of mosquito breeding water localities in the Nile Valley of Giza Governorate

Giza governorate has unique characteristics which induces mosquito proliferation and thus magnifi... more Giza governorate has unique characteristics which induces mosquito proliferation and thus magnified the risk of diseases transmission. In the present study, entomological field surveys integrated with lab analysis were utilized to characterize water quality associated with mosquito breeding habitats in the Nile Valley zone of Giza governorate. Field survey was conducted for a total number of 20 accessible breeding sites during the period of 6 th-9 th December 2019. From each visited site, mosquito larvae and water were sampled to identify larval species and analyze physico-chemical characteristics of water. Fourteen different water quality parameters were measured including pH, Total Dissolved Solids (TDS), Oxidation-Reduction Potential (ORP), Conductivity (EC), Turbidity, Chlorophyll, HDO, Crude Oil (CO), Salinity, OM, Phosphate ion (PO4 3-), Nitrate ion (NO 3-), Cadmium (Cd), Lead (Pb). Spearman correlation coefficient was used for data analysis. A total of 8,435 mosquito larvae belonging to 4 species representing one genus were collected from fixed larval breeding localities. Culex pipiens was the dominant species except in two sites where Cx. pusillus and Cx. theileri were predominant. There was a significant positive correlation between the density of Cx. pusillus and Cx. theileri with salinity, OM, nitrate, phosphate, and heavy metal. It could be concluded that the water quality characteristics are considered a good indicator to predict the existence of certain mosquito species.

Research paper thumbnail of Hyperspectral Based Assessment of Mosquito Breeding Water in Suez Canal Zone, Egypt

Environmental Remote Sensing in Egypt

Suez Canal Zone has an old history of diseases transmitted by mosquito such as Malaria, Lymphatic... more Suez Canal Zone has an old history of diseases transmitted by mosquito such as Malaria, Lymphatic filariasis, West Nile virus and Rift Valley Fever virus. Water quality of mosquito breeding habitat represents an essential determinant of whether female mosquitoes will deposit their eggs and whether the resulting stages will complete their developmental process or not. Therefore, the objective of this study is to assess physical, chemical and spectral properties of mosquito breeding habitats in the Suez Canal Zone using hyperspectral data and spectral analyses. Fifty-two different sites were sampled, during February and April 2016, for mosquito larvae and were characterized based on water temperature, pH, Oxidation-Reduction Potential (ORP), Electrical Conductivity (EC), Turbidity, Chlorophyll, Dissolved oxygen (HDO), Crude Oil (CO), Salinity, and Organic Matter (OM). Data were statistically assessed by one-way ANOVA. Hyperion image and ASD Field Spectroradiometer were processed to generate an innovative spectral library for the investigated mosquito breeding habitats. Mosquito larvae were identified as Culex (3 spp.), Anopheles (1 sp.), Ochlerotatus (2 spp.) and Culiseta (1 sp.) at seven different habitats. Analyses showed that the spectral reflectance patterns were specific for each mosquito breeding habitat corresponding to the variability of water quality. Most of habitats reported high levels of total dissolved and suspended solids such as Turbidity, EC, and OM (i.e. >535.93 NTU, >16,642.05 µS/cm, and >38.31 mg/l, respectively). It can be concluded that hyperspectral data analyses help to give more feasible assessment of mosquito breeding habitats which should widely be utilized.

Research paper thumbnail of Anthropogenic Impacts on Water Quality of River Nile and Marine Environment, Rosetta Branch Using Geospatial Analyses

Journal of Environmental Sciences. Mansoura University

Present research focused on studying water quality of three ecosystems in Rosetta branch; fresh R... more Present research focused on studying water quality of three ecosystems in Rosetta branch; fresh River Nile, estuary and Sea water based on Landsat data and samples analyses. Two multispectral Landsat images dated 26 th of February 2017 and 1 st of March 2018 provided the necessary spectral data to this research. Nineteen surface water samples were collected on 18 th March 2017 and investigated for pH, EC, silicate, phosphate, nitrite, nitrate, organic matter (OM) content and Nitrogen/Phosphorus ratio. The calibrated Landsat data, synchronized with the field trip, was processed to produce Land use cover map (LULC), Vegetation (NDVI), built-up (NDBI) and salinity indices (NDSI) to highlight the human activities in the adjacent areas. Statistical analyses were carried out to correlate the existed land uses in 2017 with water quality characteristics and to monitor spectral reflectance change in 2018 responding to water quality change. NDVI showed positive correlations with nitrate (0.416), nitrite (0.517), silicate (0.272) and N/P ratio (0.345) which confirmed the impact of agricultural activities on water nutrients. Although urban areas occupied 4.87 %, they contributed to water OM levels (R= 0.488). Means of nitrite, nitrate, phosphate and N/P followed the order; Estuary > River > Sea however for OM and EC, they followed the order; Sea > Estuary > River. N/P ratio ranged from 12.91 to 31.52 which indicated that phosphorus is the limiting factor for bio-growth of algae in the three studied environments. In this study, innovative model for calculating water phosphate was developed in 2017 which indicated a similar fluctuation in phosphate levels in 2018 within different locations. It can be concluded that remote sensing facilitates the spatial identification of the potential sources of water pollution and helps in the qualitative assessment of nutrients and organic pollutant levels in water resources.

Research paper thumbnail of Effect of heavy metals on protein content of marine unicellular green alga Dunaliella tertiolecta

Environmental Monitoring and Assessment

Microalgae are rich source of protein containing necessary amino acids at different levels. The p... more Microalgae are rich source of protein containing necessary amino acids at different levels. The present study was designed to assess stimulatory and/or inhibitory impact of five different concentrations (5, 10, 15, 20, and 25 mg/L) of three essential heavy metals (nickel, zinc, and copper) on protein content (soluble, insoluble, and total) of the marine unicellular green alga Dunaliella tertiolecta. Further, geospatial analyses were used to assess the suitability of Qaroun Lake for D. tertiolecta proliferation. The experimental results showed a gradual increase in protein content of D. tertiolecta with low concentrations of the three investigated heavy metals. However, increasing levels of heavy metals led to inhibitory effect on protein synthesis in alga with different grades. Ni, Zn and Cu levels in Qaroun lake were found suitable for the proliferation of Dunaliella (Lower than 5 mg/L). The present study highly recommends the necessity to encourage site selection of optimal marine environments suitable for the proliferation of marine algae rich in protein content.

Research paper thumbnail of Modeling Water Quality Parameters Using Landsat Multispectral Images: A Case Study of Erlong Lake, Northeast China

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Integration of satellite data and spatial decision models for zoning new urban communities in El-Fayoum Desert

Arabian Journal of Geosciences

The current study adopts a spatial multidisciplinary approach for applying allocation models in z... more The current study adopts a spatial multidisciplinary approach for applying allocation models in zoning new urban sustainable communities in El-Fayoum Desert. Landsat 8 OLI imageries acquired in 2016, Shuttle Radar Topography Mission data, and thematic maps were utilized. Three spatial multicriteria sub-models were designed to create three criteria themes, namely, land resources, infrastructure, and environmental protection. The analytical hierarchy process and fuzzy sets were used for infrastructure and resources themes. The infrastructure theme was combined using weighted linear combination (WLC). The ordered weighted averaging (OWA) low-risk “AND” was used to combine the resources theme. The environmental protection theme was combined using the Boolean overlay model. The three themes (sub-models) were finally combined using equal weights to produce suitability index maps. OWA model was run on the combined (index) to test the different level of risk and trade-off between the factors. Results reveal that OWA model with minimum risk (AND) resulted in most optimum zones with total area equivalent to 58.33 km2. The WLC model (OWA medium risk) resulted in optimum zones of total area equivalent to 102.77 km2. The OWA maximum risk (OR) resulted in optimum zones with total area equivalent to 329.84 km2. The resultant maps were compared with the zones for new urban communities proposed by the General Organization for Physical Planning in its strategy for sustainable urban development of El-Fayoum. The comparison pointed out a reasonable agreement; in addition, results revealed more suitable locations that are recommended for future urban development.

Research paper thumbnail of Spectroscopic Characterization of Plant Cover in El-Fayoum Governorate, Egypt

Egyptian Journal of Soil Science

Research paper thumbnail of Production of Risk Classification Map for the Area Vulnerable To Mosquito-Transmitted Diseases, Suez Canal Zone

May 17-18, 2017 Istanbul (Turkey), May 17, 2017

Suez Canal area is characterized by a unique nature therefore various species of mosquitoes are s... more Suez Canal area is characterized by a unique nature therefore various species of mosquitoes are spread in the area. Present paper aims at mapping and classifying the area under environmental risk of mosquito proliferation and diseases transmission at Suez Canal Zone using Landsat OLI data and GIS. To fulfil this objective, 6 field trips in the period from Nov.2014 to Apr.2016, were conducted to collect mosquito larvae and characterize breeding sites. Six calibrated Landsat-8 images were processed to characterize mosquitoes breeding sites and therefore map the area under environmental risk of mosquito proliferation. Considering the degree of mosquito proliferation, the study area was categorized into four levels of risk; high risk, risk, vulnerable and non-infected. Results of surveys showed that the main vector of Filarasis (Culex pipiens) was the most abundant species in Suez Canal Zone. The produced risk map showed that the total high risk area occupies 59.16 km 2 (1 %), risk area 2026.37 km 2 (27 %), vulnerable 497.5 km 2 (7 %) and non-infected 4940.43 km 2 (65%) throughout Suez Canal Zone. Majority of the study area is located in the non-infected area which is concentrated in eastern and western deserts which are not inhabited. The high percent of the infected area is concentrated in several parts of Ismailia Governorate. The produced risk map is necessary requirement for decision makers to initiate mosquito control strategies and management programs. To assess the produced map, more than 120 different localities were visited. It could be concluded that Landsat-8 data and GIS techniques have proved high efficiency in mapping and classifying the area under risk of mosquito spread out particularly in inaccessible regions.

Research paper thumbnail of Environmental sensitivity to mosquito transmitted diseases in El-Fayoum using spatial analyses

E3S Web of Conferences

El-Fayoum governorate has unique characteristics which induces mosquito proliferation and thus in... more El-Fayoum governorate has unique characteristics which induces mosquito proliferation and thus increased the risk arisen from diseases transmission. Present study explores the role of remote sensing and GIS modeling integrated with field survey for mapping mosquito breeding sites and the areas under risk of diseases transmission in El-Fayoum governorate. Entomological surveys were conducted for a total number of 40 accessible breeding sites during the period 12-16 November 2017. A calibrated Landsat OLI image, synchronized with the field trip, was processed to produce Normalized Difference Vegetation Index (NDVI), Normalized Difference Moisture Index (NDMI), and Land Surface Temperature (LST). A cartographic GIS model was generated to predict breeding sites in the whole governorate and to assess the potential risk. The main filarial disease vector (Culex pipiens) was abundant at Atsa district, while Malaria vectors (Anopheles sergentii and Anopheles multicolor) were mainly distribut...

Research paper thumbnail of Qualitative assessment of groundwater quality based on land use spectral retrieved indices: Case study Sohag Governorate, Egypt

Remote Sensing Applications: Society and Environment

Abstract Sohag governorate, as one of the highly inhabited governorates in Upper Egypt, is charac... more Abstract Sohag governorate, as one of the highly inhabited governorates in Upper Egypt, is characterized by developmental projects implemented in its desert zone, west to the River Nile. The present study aims to evaluate groundwater quality parameters in west of Sohag governorate, based on a set of retrieved land use spectral indices. Two multispectral Landsat images; ETM 2008 and OLI 2016 provided the necessary spectral information for this study. The calibrated images were processed to calculate the Normalized Difference Vegetation Index (NDVI), Normalized Differential Salinity Index (NDSI), Normalized Difference Built-Up Index (NDBI), Modified Normalized Difference Water Index (MNDWI) and the Land use Land cover (LULC). Groundwater quality was analyzed and assessed in 2008 and 2016 including some physicochemical characteristics. Correlation coefficient between spectral retrieved indices and groundwater quality was calculated to address the temporal and spatial changes in groundwater quality in response to LULC changes. The study area was mainly covered by urban and cultivated lands (>75%) which increased the sources of groundwater pollution. In 2008, NDBI and NDSI showed significant correlations (> 0.5) with TH, EC, TDS, SAR and SO4 which explains the negative impact of urbanization and land degradation on groundwater quality. In 2016, the response of groundwater quality to urbanization and degradation appeared in the levels of groundwater silicate (correlation > 0.5) and OM (correlation > 0.8). Variation of groundwater quality in response with vegetation cover (NDVI) is changeable, depending on the severity of the interrupting activities in each cultivated area. Phosphate levels in groundwater were significantly influenced by the usage of phosphate fertilizers in the agricultural land of West Sohag (correlation = 0.57). It could be concluded integrated remote sensing and groundwater quality gives a precise explanation for the influence of urbanization, cultivation and other human activities on groundwater quality.

Research paper thumbnail of Review of Land-Use Impacts on Surface Water Quality in Egypt

Journal of the Indian Society of Remote Sensing

Deterioration of surface water quality in Egypt is one of the consequences of destructive land-us... more Deterioration of surface water quality in Egypt is one of the consequences of destructive land-use activities. The present article aims to review and highlight the research studies that were conducted to assess surface water quality in Egypt taking into account surrounding land uses and various anthropogenic activities. Different surface water bodies in Egypt were considered including River Nile, Lakes, Suez Canal, Mediterranean Sea, Red Sea and main irrigation canals. Water quality studies in Egypt depend on assessing physical, chemical and biological characteristics using different kinds of data and methods. Field observation, sampling, laboratory analyses, water quality indices, principle component analyses, remote sensing and GIS are the most common methods used in surface water quality assessment studies in Egypt. Discharge of contaminated water from urbanized, agricultural and industrial areas in addition to oil seepage from shipping, particularly in harbors, represents the main reasons of surface water quality degradation in Egypt. To conserve surface water and improve its quality in Egypt, it is highly recommended to provide sufficient wastewater treatment plants and control land-use changes and all associated activities. The Egyptian government initiated several projects and programs for improving surface water quality (Egypt Vision 2030).

Research paper thumbnail of Update, Conclusions, and Recommendations of “Environmental Remote Sensing in Egypt”

Environmental Remote Sensing in Egypt

The current chapter highlights the main conclusions and recommendations of the chapters presented... more The current chapter highlights the main conclusions and recommendations of the chapters presented in the book. Also, some findings from recently published research works related to the Environmental Remote Sensing in Egypt are discussed. This chapter contains information on remote sensing applications in the field of environmental applications. The topics covered in the book include: environmental applications of remote sensing, radar remote sensing applications, monitoring changes in natural ecosystems, groundwater exploration, monitoring and protection of Egyptian Northern Lakes, environmental hazards threatening Lake Nasser, oil pollution in the Mediterranean and Red Seas, modeling of climate changes, land degradation and desertification, landscapes of Egypt, bathymetry modeling, sediment capacity, shoreline dynamics, monitoring of the Nile River. In addition, a set of recommendations for future research work is pointed out to direct the future research towards the importance of using advanced remote sensing techniques in the field of environment for the sake of its sustainability and protection.

Research paper thumbnail of Geo-environmental monitoring of coastal and land resources of Port Said Governorate, Egypt

The Egyptian Journal of Remote Sensing and Space Science

Research paper thumbnail of Wild Plant Habitat Characterization in the Last Two Decades in the Nile Delta Coastal Region of Egypt

Agriculture

Environmental and land-use changes put severe pressure on wild plant habitats. The present study ... more Environmental and land-use changes put severe pressure on wild plant habitats. The present study aims to assess the biodiversity of wild plant habitats and the associated spatiotemporal environmental changes in the coastal region of Dakahlia Governorate following an integrated approach of remote sensing, GIS, and samples analysis. Thirty-seven stands were spatially identified and studied to represent the different habitats of wild plants in the Deltaic Mediterranean coastline region. Physical and chemical characteristics of soil samples were examined, while TWINSPAN classification was used to identify plant communities. Two free Landsat images (TM and OLI) acquired in 1999 and 2019 were processed to assess changes via the production of land use and cover maps (LULC). Moreover, NDSI, NDMI, and NDSI indices were used to identify wild plant habitats. The floristic composition indicated the existence of 57 species, belonging to 51 genera of 20 families. The largest families were Asterac...

Research paper thumbnail of Species Composition and Relative Abundance of Mosquito Larvae in Suez Canal Zone, Egypt

Asian Journal of Biology, Jan 10, 2017

Research paper thumbnail of Environmental and Stress Analysis of Wild Plant Habitat in River Nile Region of Dakahlia Governorate on Basis of Geospatial Techniques

Sustainability

Spatiotemporal environmental changes lead to disturbances in wild plant habitats, particularly in... more Spatiotemporal environmental changes lead to disturbances in wild plant habitats, particularly in regions characterized by changeable land use and cover. The present study aims to characterize wild plant habitats in the River Nile region of Dakahlia Governorate using a multidisciplinary approach, incorporating remote sensing, GIS and sampling analyses. Twenty-four stands representing the wild plant habitats in the River Nile region were geographically identified, sampled and analyzed. Water and soil samples were investigated for physical and chemical characteristics. Two calibrated multispectral Landsat images dated 1999 and 2019 were processed to produce LULC, NDSI, NDMI and NDSI to characterize wild plan habitats. The floristic composition showed the presence of 64 species belonging to 53 genera and 28 families. Ecologically, the recorded plant species in the present work can be classified into four main categories, which are separated into three communities according to the TWINS...

Research paper thumbnail of Mapping mosquito larval densities and assessing area vulnerable to diseases transmission in Nile valley of Giza, Egypt

The Egyptian Journal of Remote Sensing and Space Science

Research paper thumbnail of Modeling Water Quality Parameters Using Landsat Multispectral Images: A Case Study of Erlong Lake, Northeast China

Remote Sensing

Erlong Lake is considered one of the largest lakes in midwest Jilin, China, and one of the drinki... more Erlong Lake is considered one of the largest lakes in midwest Jilin, China, and one of the drinking water resources in neighboring cities. The present study aims to explore the usage of Landsat TM5, ETM7, and OLI8 images to assess water quality (V-phenol, dissolved oxygen (DO), NH4-N, NO3-N) in Erlong Lake, Jilin province, northeast China. Thirteen multispectral images were used in this study for May, July, August, and September in 2000, 2001, 2002, and October 2020. Radiometric and atmospheric corrections were applied to all images. All in situ water quality parameters were strongly correlated to each other, except DO. The in situ measurements (V-phenol, dissolved oxygen, NH4-N, NO3-N) were statistically correlated with various spectral band combinations (blue, green, red, and NIR) derived from Landsat imagery. Regression analysis reported that there are strong relationships between the estimated and retrieved water quality from the Landsat images. Moreover, in calibrations, the hi...

Research paper thumbnail of Integration of lab analyses and GIS techniques for assessment of some physical and chemical characteristics in different water bodies, Damietta coastal region, Egypt

1. Abstract In this research, integration between field work, lab analyses and GIS has been utili... more 1. Abstract In this research, integration between field work, lab analyses and GIS has been utilized for assessing and mapping some physical and chemical characteristics in different water bodies at Damietta coastal region. Regular sampling method was used for collecting thirty water samples from five different connected water bodies in the area of study (i.e. Mediterranean Sea, Manzala Lagoon, River Nile, Irrigation and drainage canals). Studied water characteristics include pH, turbidity, total dissolved solids (TDS), ammonia, dissolved oxygen (DO), biological oxygen demand (BOD) and chemical oxygen demand (COD). Chemical characteristics of water samples were determined according to the standard method. GIS kriging method was used for mapping these characteristics in which the standardized mean ranged from 0.0080 to -0.0874 while the RMSS ranged from 0.8868 to 1.3607. A GIS vector layer of all water bodies has been used for masking the mapped parameter in order to display it only ...

Research paper thumbnail of Species Composition and Relative Abundance of Mosquito Larvae in Suez Canal Zone, Egypt

Research paper thumbnail of Water quality assessment of mosquito breeding water localities in the Nile Valley of Giza Governorate

Giza governorate has unique characteristics which induces mosquito proliferation and thus magnifi... more Giza governorate has unique characteristics which induces mosquito proliferation and thus magnified the risk of diseases transmission. In the present study, entomological field surveys integrated with lab analysis were utilized to characterize water quality associated with mosquito breeding habitats in the Nile Valley zone of Giza governorate. Field survey was conducted for a total number of 20 accessible breeding sites during the period of 6 th-9 th December 2019. From each visited site, mosquito larvae and water were sampled to identify larval species and analyze physico-chemical characteristics of water. Fourteen different water quality parameters were measured including pH, Total Dissolved Solids (TDS), Oxidation-Reduction Potential (ORP), Conductivity (EC), Turbidity, Chlorophyll, HDO, Crude Oil (CO), Salinity, OM, Phosphate ion (PO4 3-), Nitrate ion (NO 3-), Cadmium (Cd), Lead (Pb). Spearman correlation coefficient was used for data analysis. A total of 8,435 mosquito larvae belonging to 4 species representing one genus were collected from fixed larval breeding localities. Culex pipiens was the dominant species except in two sites where Cx. pusillus and Cx. theileri were predominant. There was a significant positive correlation between the density of Cx. pusillus and Cx. theileri with salinity, OM, nitrate, phosphate, and heavy metal. It could be concluded that the water quality characteristics are considered a good indicator to predict the existence of certain mosquito species.

Research paper thumbnail of Hyperspectral Based Assessment of Mosquito Breeding Water in Suez Canal Zone, Egypt

Environmental Remote Sensing in Egypt

Suez Canal Zone has an old history of diseases transmitted by mosquito such as Malaria, Lymphatic... more Suez Canal Zone has an old history of diseases transmitted by mosquito such as Malaria, Lymphatic filariasis, West Nile virus and Rift Valley Fever virus. Water quality of mosquito breeding habitat represents an essential determinant of whether female mosquitoes will deposit their eggs and whether the resulting stages will complete their developmental process or not. Therefore, the objective of this study is to assess physical, chemical and spectral properties of mosquito breeding habitats in the Suez Canal Zone using hyperspectral data and spectral analyses. Fifty-two different sites were sampled, during February and April 2016, for mosquito larvae and were characterized based on water temperature, pH, Oxidation-Reduction Potential (ORP), Electrical Conductivity (EC), Turbidity, Chlorophyll, Dissolved oxygen (HDO), Crude Oil (CO), Salinity, and Organic Matter (OM). Data were statistically assessed by one-way ANOVA. Hyperion image and ASD Field Spectroradiometer were processed to generate an innovative spectral library for the investigated mosquito breeding habitats. Mosquito larvae were identified as Culex (3 spp.), Anopheles (1 sp.), Ochlerotatus (2 spp.) and Culiseta (1 sp.) at seven different habitats. Analyses showed that the spectral reflectance patterns were specific for each mosquito breeding habitat corresponding to the variability of water quality. Most of habitats reported high levels of total dissolved and suspended solids such as Turbidity, EC, and OM (i.e. >535.93 NTU, >16,642.05 µS/cm, and >38.31 mg/l, respectively). It can be concluded that hyperspectral data analyses help to give more feasible assessment of mosquito breeding habitats which should widely be utilized.

Research paper thumbnail of Anthropogenic Impacts on Water Quality of River Nile and Marine Environment, Rosetta Branch Using Geospatial Analyses

Journal of Environmental Sciences. Mansoura University

Present research focused on studying water quality of three ecosystems in Rosetta branch; fresh R... more Present research focused on studying water quality of three ecosystems in Rosetta branch; fresh River Nile, estuary and Sea water based on Landsat data and samples analyses. Two multispectral Landsat images dated 26 th of February 2017 and 1 st of March 2018 provided the necessary spectral data to this research. Nineteen surface water samples were collected on 18 th March 2017 and investigated for pH, EC, silicate, phosphate, nitrite, nitrate, organic matter (OM) content and Nitrogen/Phosphorus ratio. The calibrated Landsat data, synchronized with the field trip, was processed to produce Land use cover map (LULC), Vegetation (NDVI), built-up (NDBI) and salinity indices (NDSI) to highlight the human activities in the adjacent areas. Statistical analyses were carried out to correlate the existed land uses in 2017 with water quality characteristics and to monitor spectral reflectance change in 2018 responding to water quality change. NDVI showed positive correlations with nitrate (0.416), nitrite (0.517), silicate (0.272) and N/P ratio (0.345) which confirmed the impact of agricultural activities on water nutrients. Although urban areas occupied 4.87 %, they contributed to water OM levels (R= 0.488). Means of nitrite, nitrate, phosphate and N/P followed the order; Estuary > River > Sea however for OM and EC, they followed the order; Sea > Estuary > River. N/P ratio ranged from 12.91 to 31.52 which indicated that phosphorus is the limiting factor for bio-growth of algae in the three studied environments. In this study, innovative model for calculating water phosphate was developed in 2017 which indicated a similar fluctuation in phosphate levels in 2018 within different locations. It can be concluded that remote sensing facilitates the spatial identification of the potential sources of water pollution and helps in the qualitative assessment of nutrients and organic pollutant levels in water resources.

Research paper thumbnail of Effect of heavy metals on protein content of marine unicellular green alga Dunaliella tertiolecta

Environmental Monitoring and Assessment

Microalgae are rich source of protein containing necessary amino acids at different levels. The p... more Microalgae are rich source of protein containing necessary amino acids at different levels. The present study was designed to assess stimulatory and/or inhibitory impact of five different concentrations (5, 10, 15, 20, and 25 mg/L) of three essential heavy metals (nickel, zinc, and copper) on protein content (soluble, insoluble, and total) of the marine unicellular green alga Dunaliella tertiolecta. Further, geospatial analyses were used to assess the suitability of Qaroun Lake for D. tertiolecta proliferation. The experimental results showed a gradual increase in protein content of D. tertiolecta with low concentrations of the three investigated heavy metals. However, increasing levels of heavy metals led to inhibitory effect on protein synthesis in alga with different grades. Ni, Zn and Cu levels in Qaroun lake were found suitable for the proliferation of Dunaliella (Lower than 5 mg/L). The present study highly recommends the necessity to encourage site selection of optimal marine environments suitable for the proliferation of marine algae rich in protein content.

Research paper thumbnail of Modeling Water Quality Parameters Using Landsat Multispectral Images: A Case Study of Erlong Lake, Northeast China

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Integration of satellite data and spatial decision models for zoning new urban communities in El-Fayoum Desert

Arabian Journal of Geosciences

The current study adopts a spatial multidisciplinary approach for applying allocation models in z... more The current study adopts a spatial multidisciplinary approach for applying allocation models in zoning new urban sustainable communities in El-Fayoum Desert. Landsat 8 OLI imageries acquired in 2016, Shuttle Radar Topography Mission data, and thematic maps were utilized. Three spatial multicriteria sub-models were designed to create three criteria themes, namely, land resources, infrastructure, and environmental protection. The analytical hierarchy process and fuzzy sets were used for infrastructure and resources themes. The infrastructure theme was combined using weighted linear combination (WLC). The ordered weighted averaging (OWA) low-risk “AND” was used to combine the resources theme. The environmental protection theme was combined using the Boolean overlay model. The three themes (sub-models) were finally combined using equal weights to produce suitability index maps. OWA model was run on the combined (index) to test the different level of risk and trade-off between the factors. Results reveal that OWA model with minimum risk (AND) resulted in most optimum zones with total area equivalent to 58.33 km2. The WLC model (OWA medium risk) resulted in optimum zones of total area equivalent to 102.77 km2. The OWA maximum risk (OR) resulted in optimum zones with total area equivalent to 329.84 km2. The resultant maps were compared with the zones for new urban communities proposed by the General Organization for Physical Planning in its strategy for sustainable urban development of El-Fayoum. The comparison pointed out a reasonable agreement; in addition, results revealed more suitable locations that are recommended for future urban development.

Research paper thumbnail of Spectroscopic Characterization of Plant Cover in El-Fayoum Governorate, Egypt

Egyptian Journal of Soil Science

Research paper thumbnail of Production of Risk Classification Map for the Area Vulnerable To Mosquito-Transmitted Diseases, Suez Canal Zone

May 17-18, 2017 Istanbul (Turkey), May 17, 2017

Suez Canal area is characterized by a unique nature therefore various species of mosquitoes are s... more Suez Canal area is characterized by a unique nature therefore various species of mosquitoes are spread in the area. Present paper aims at mapping and classifying the area under environmental risk of mosquito proliferation and diseases transmission at Suez Canal Zone using Landsat OLI data and GIS. To fulfil this objective, 6 field trips in the period from Nov.2014 to Apr.2016, were conducted to collect mosquito larvae and characterize breeding sites. Six calibrated Landsat-8 images were processed to characterize mosquitoes breeding sites and therefore map the area under environmental risk of mosquito proliferation. Considering the degree of mosquito proliferation, the study area was categorized into four levels of risk; high risk, risk, vulnerable and non-infected. Results of surveys showed that the main vector of Filarasis (Culex pipiens) was the most abundant species in Suez Canal Zone. The produced risk map showed that the total high risk area occupies 59.16 km 2 (1 %), risk area 2026.37 km 2 (27 %), vulnerable 497.5 km 2 (7 %) and non-infected 4940.43 km 2 (65%) throughout Suez Canal Zone. Majority of the study area is located in the non-infected area which is concentrated in eastern and western deserts which are not inhabited. The high percent of the infected area is concentrated in several parts of Ismailia Governorate. The produced risk map is necessary requirement for decision makers to initiate mosquito control strategies and management programs. To assess the produced map, more than 120 different localities were visited. It could be concluded that Landsat-8 data and GIS techniques have proved high efficiency in mapping and classifying the area under risk of mosquito spread out particularly in inaccessible regions.

Research paper thumbnail of Environmental sensitivity to mosquito transmitted diseases in El-Fayoum using spatial analyses

E3S Web of Conferences

El-Fayoum governorate has unique characteristics which induces mosquito proliferation and thus in... more El-Fayoum governorate has unique characteristics which induces mosquito proliferation and thus increased the risk arisen from diseases transmission. Present study explores the role of remote sensing and GIS modeling integrated with field survey for mapping mosquito breeding sites and the areas under risk of diseases transmission in El-Fayoum governorate. Entomological surveys were conducted for a total number of 40 accessible breeding sites during the period 12-16 November 2017. A calibrated Landsat OLI image, synchronized with the field trip, was processed to produce Normalized Difference Vegetation Index (NDVI), Normalized Difference Moisture Index (NDMI), and Land Surface Temperature (LST). A cartographic GIS model was generated to predict breeding sites in the whole governorate and to assess the potential risk. The main filarial disease vector (Culex pipiens) was abundant at Atsa district, while Malaria vectors (Anopheles sergentii and Anopheles multicolor) were mainly distribut...

Research paper thumbnail of Qualitative assessment of groundwater quality based on land use spectral retrieved indices: Case study Sohag Governorate, Egypt

Remote Sensing Applications: Society and Environment

Abstract Sohag governorate, as one of the highly inhabited governorates in Upper Egypt, is charac... more Abstract Sohag governorate, as one of the highly inhabited governorates in Upper Egypt, is characterized by developmental projects implemented in its desert zone, west to the River Nile. The present study aims to evaluate groundwater quality parameters in west of Sohag governorate, based on a set of retrieved land use spectral indices. Two multispectral Landsat images; ETM 2008 and OLI 2016 provided the necessary spectral information for this study. The calibrated images were processed to calculate the Normalized Difference Vegetation Index (NDVI), Normalized Differential Salinity Index (NDSI), Normalized Difference Built-Up Index (NDBI), Modified Normalized Difference Water Index (MNDWI) and the Land use Land cover (LULC). Groundwater quality was analyzed and assessed in 2008 and 2016 including some physicochemical characteristics. Correlation coefficient between spectral retrieved indices and groundwater quality was calculated to address the temporal and spatial changes in groundwater quality in response to LULC changes. The study area was mainly covered by urban and cultivated lands (>75%) which increased the sources of groundwater pollution. In 2008, NDBI and NDSI showed significant correlations (> 0.5) with TH, EC, TDS, SAR and SO4 which explains the negative impact of urbanization and land degradation on groundwater quality. In 2016, the response of groundwater quality to urbanization and degradation appeared in the levels of groundwater silicate (correlation > 0.5) and OM (correlation > 0.8). Variation of groundwater quality in response with vegetation cover (NDVI) is changeable, depending on the severity of the interrupting activities in each cultivated area. Phosphate levels in groundwater were significantly influenced by the usage of phosphate fertilizers in the agricultural land of West Sohag (correlation = 0.57). It could be concluded integrated remote sensing and groundwater quality gives a precise explanation for the influence of urbanization, cultivation and other human activities on groundwater quality.