Mohamed Lachhab - Academia.edu (original) (raw)

Papers by Mohamed Lachhab

Proceedings of the 4th Edition of International Conference on Geo-IT and Water Resources 2020, Geo-IT and Water Resources 2020

Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-... more Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-lying continental lake in Morocco. The objective of this work is to assess the physicochemical quality of the lake in low water period. Six samples, noted from S1 to S6, were taken all around the lake from the banks. The physicochemical analysis of the water was carried out in November 2019. The temperature, pH, dissolved oxygen and electrical conductivity were measured in situ. The chemical composition was determined in the laboratory. The obtained results show that the pH of water is basic. The concentration of dissolved oxygen, nitrates and sulfate shows that the water is of good quality according to Moroccan surface water guidelines. The chemical composition is characterized by a dominance of chlorides and sodium. The chloride concentration is high. The value of the electrical conductivity (4 to 5 mmhos / cm) and of the total concentration of dissolved salts analyzed shows that the salinity of the water (> 2500 mg / l) is high. Water is therefore classified as brackish. This high mineralization is explained by the dissolution of the evaporitic rocks of the region.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021

This work is part of a program to study and monitor the impact of human activities in the cities ... more This work is part of a program to study and monitor the impact of human activities in the cities of Missour and Outat El Haj on the quality of the surface waters of the average Moulouya (Morocco). The aim of this study is to evaluate in time and space, the degree of metallic pollution of surface water of the average Moulouya during the period (September 2014, January, April and July 2015). The results of this study suggest that the waters of the ten stations in the study area are relatively contaminated with heavy metals. The contents of the analyzed metals are high and variable in the wastewater of the cities of Missour and Outat El Haj and in the waters of the Moulouya average. The anthropogenic impact on the ecosystems selected for this work is highlighted by: the high metallic contamination of the water of the stations located downstream of wastewater discharges of the cities of Missour and Outat El Haj, and the variation of the contents according to an increasing concentration gradient from station M1 to M9.

Innovations in Smart Cities Applications Edition 3, 2020

E3S Web of Conferences, 2021

The climatic changes that the middle Moulouya region of Morocco has undergone in recent years, de... more The climatic changes that the middle Moulouya region of Morocco has undergone in recent years, demographic growth and the development of urbanization have led to a significant decrease in the reserves of water that can be mobilized for domestic and agricultural uses. This deficit, between availability and need for water, will only increase with the increasing needs of the water consuming sectors. The main objective is to follow the physical-chemical evolution of raw wastewater in the city of Outat El Haj. Sampling took place over 12 months (2014-2015). The physical-chemical study of urban discharges from the city of Outat El Haj made it possible to define the pollution ratio per inhabitant between 17 and 21 mg/hab.day with BOD5 concentration between 525 mg/l and 2125 mg/l and pH values near neutrality. The ratio COD/BOD5 is from 1.92 to 2.04, shows the biodegradability of effluents, and may be treated by a biological system such as stabilization ponds as found nationwide. The values...

E3S Web of Conferences, 2021

The Lake Sidi Boughaba is a Ramsar site (1980) located on the Atlantic coast of north-west Morocc... more The Lake Sidi Boughaba is a Ramsar site (1980) located on the Atlantic coast of north-west Morocco. It is oriented NNE - SSW and located in a secondary interdunal depression formed in a complex of the main wetlands of Morocco. The waters of this lake are deteriorating in quality, with increasing salinization. To identify the processes and chemical reactions that govern salinization, the main major elements as well as the pH, electrical conductivity and salinity were monitored during the winter and summer seasons of the years, 2016-2017 in 6 sites distributed throughout the year. The interpretation of the analysis data is carried out using the correlation of the major elements with the chlorides, the Piper diagram and the variation of the ionic ratios Na/Cl, SO4/Cl, Mg/Ca and the calculation of the saturation index. The saturation index is calculated by the software PHREEQC 2.8, used for modelling the state of saturation of minerals. The results of these analyzes revealed a variety o...

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

The adoption of an ecological sanitation system, meeting the requirements hygienic and sanitary, ... more The adoption of an ecological sanitation system, meeting the requirements hygienic and sanitary, constitutes a feasible and technically and economically acceptable solution in the future smart city. This new sanitation concept has the advantage of solving the problems of pathogens of human waste at source, thus offering the possibility of reusing them after treatment (recycling) in order to improve the standard of living of the population and protect the environment. The aim of this study is to evaluate the efficiency of a vertical Multi-Soil-Layering system (MSL) system to treat domestic wastewater under three hydraulic loading rates: 250 L/m 2 /day, 350 L/m 2 /day and 500 L/m 2 /day, in Moroccan conditions. To do this, a vertical MSL system measuring 20cm x 60cm x 78cm (L ×W× H) was designed to treat domestic wastewater and his performance was investigated. The results showed high removal of organic matters and nutrients under the three hydraulic loads tested; the performance averages recorded are upper than 84 % for organic matters, 83.1±7.2 % for ammonium and 72.4±14.1 % for orthophosphate. The quality of the treated wastewater was evaluated according to Moroccan reject limit value. Consequently, this system could be considered an effective solution to be adopted for decentralized domestic wastewater treatment in Moroccan conditions.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

Domestic wastewater (toilet water and household water from kitchens) is evacuated in unit or sepa... more Domestic wastewater (toilet water and household water from kitchens) is evacuated in unit or separate networks to the purification station (STEP) in order to eliminate their waste; organic and mineral matter, dissolved and suspended before discharging them into the natural environment or reusing them in irrigation. The main purpose of this work is to operate the wastewater treatment plant in the Ben Slimane Airport area by using activated sludge, this process consists of destroying pollutants and microorganisms by bacteria formed in the clarifier. Moreover, the operation of the station was considered by controlling the sensors installed in each basin to promote their optimization, in addition, the physicochemical analysis was carried out in the STEP laboratory. The results found for the parameters studied showed the very effective reduction of the organic load of the wastewater treatment plant, so these values meet the discharge standards defined by Moroccan legislation.

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

The availability of land and the climatic conditions encouraged by the geographical situation of ... more The availability of land and the climatic conditions encouraged by the geographical situation of Morocco, have pushed this country to adopt since the 90s natural leaning as being the technical solution most suited to the economic and climatic context, thus, many treatment stations wastewater has already been carried out. In order to assess the performance of the natural lagoon-type treatment plant in the town of Outat El Haj, we studied the physicochemical parameters of the raw and purified water from the plant. For this, we carried out a set of measurements such as: Temperature, pH and Electrical Conductivity (EC) (parameters on site), Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Suspended Solids (TSS), Dissolved Oxygen, Hydrotimetric Titer (TH), Cl-Chloride, Organic Matter (OM), Orthophosphates, and Nitrates, in order to examine the reliability of this purification process in the study area. The purification yields observed in the treatment plant vary from 23 to 94.6% as an abatement for BOD5. This average yield varies between 22.3 and 89.8% for COD, between 22.6 and 90.6% for OM, and between 9.2 and 65.5% for suspended matter (suspended matter). The purification performance is negative to very low in nitrogen and Orthophosphates. The results of the analyzes showed that the purification yields of the natural lagoon-type station, low, variable and remain dependent on the season.

Interdisciplinary Perspectives on Infectious Diseases, 2020

Background. Leishmaniases are vector-borne diseases with health risks. They cause a big health pr... more Background. Leishmaniases are vector-borne diseases with health risks. They cause a big health problem. These parasitic diseases are transmitted by the parasite of the genus Leishmania through sandflies. Objective. The aim of this work is to study the distribution of the incidence of cutaneous leishmaniasis (CL) cases and the impact of urbanization and socioeconomic factors and their effects as leishmaniasis risk factors. Methods. We conducted a retrospective study of CL cases collected at the level of Sefrou Province during the period from 2007 to 2011. The data was collected from registers of the Medical Delegation of Sefrou Province. The socioeconomic data, namely, the poverty rate, the popular density, and the type of environment (urban/rural) of Sefrou Province, were obtained from the High Commission for Planning. Statistical analysis was performed by SPSS software (version 20). The data were registered in a Microsoft Excel 2010 file. Statistical analysis was based on one-way a...

Journal of Parasitology Research, 2020

Leishmaniasis diseases are endemic in Morocco. An entomological survey was conducted in Aichoun l... more Leishmaniasis diseases are endemic in Morocco. An entomological survey was conducted in Aichoun locality for 1 year from September 2013 to August 2014. The objective of this study was to investigate the sand fly fauna, mainly the species composition and the monthly species prevalence in accordance with bioclimate factors. Sand flies were collected twice a month, using sticky traps and CDC light traps. During a one-year study, 4472 specimens of sand fly were caught (72.56% male/22.44% female) that were composed of seven species divided into two genera: Phlebotomus (99.46%) and Sergentomyia (0.53%). Ph. sergenti was the most prevalent species (46.64%), followed by Ph. perniciosus (38.19%), Ph. longicuspis (9.32%), Ph. papatasi (5.23%), and Ph. ariasi (0.06%). The genus Sergentomyia was even less frequent. The population dynamics showed a bimodal trend with two peaks: the first one in October (12.03% of specimens) and the second in June (27.92% of specimens). The study of the effects o...

Indian Journal of Science and Technology, 2019

Objectives: The work is to evaluate and control the physicochemical quality of the groundwater in... more Objectives: The work is to evaluate and control the physicochemical quality of the groundwater in the medium Oulmes plate, to protect human health. Methods/Analysis: We have evaluated the quality of seven wells of the area of the plate of oulmes of the Moroccan Atlas during the year 2016; vary by carrying out the analysis for 16 physic-chemical and chemical parameters in the laboratory and "in situ". These parameters are pH, T, electric conductivity, salinity, potential of oxydoreduction, turbidity, dissolved oxygen, Ca 2+ , Mg 2+ , Na + , K + , Cl-, SO 4 2-, CO3 2and HCO 3-. These parameters are measured by the apparatus Hanna Instruments HI 98280 and Hach 2100 NTU, the anions and cations are measured by the atomic absorption. Findings: Electric conductivity 4110 µS/cm, salinity is worth 1 mg/l, turbidity 9 TNU, dissolved oxygen 6.63 mg/l, potential of oxydoreduction 118.9 mV, he concentration of calcium 300.7 mg/l, the potassium concentration 39.04 mg/l, the magnesium concentration 65.61 mg/l, the sulphate concentration 102.01 mg/l, nitrate concentration 10.34 mg/l, and bicarbonate concentration 1068 mg/l. Indeed, these got results reveal that the degree of pollution exceeds the threshold of the national and international standards of potability. Application: In front of this situation, this requires a control and a treatment to preserve the natural environment.

International Journal of Advanced Research, 2017

Proceedings of the 4th Edition of International Conference on Geo-IT and Water Resources 2020, Geo-IT and Water Resources 2020

Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-... more Dayet Erroumi lake is a site of biological and ecological interest. It is the only permanent low-lying continental lake in Morocco. The objective of this work is to assess the physicochemical quality of the lake in low water period. Six samples, noted from S1 to S6, were taken all around the lake from the banks. The physicochemical analysis of the water was carried out in November 2019. The temperature, pH, dissolved oxygen and electrical conductivity were measured in situ. The chemical composition was determined in the laboratory. The obtained results show that the pH of water is basic. The concentration of dissolved oxygen, nitrates and sulfate shows that the water is of good quality according to Moroccan surface water guidelines. The chemical composition is characterized by a dominance of chlorides and sodium. The chloride concentration is high. The value of the electrical conductivity (4 to 5 mmhos / cm) and of the total concentration of dissolved salts analyzed shows that the salinity of the water (> 2500 mg / l) is high. Water is therefore classified as brackish. This high mineralization is explained by the dissolution of the evaporitic rocks of the region.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021

This work is part of a program to study and monitor the impact of human activities in the cities ... more This work is part of a program to study and monitor the impact of human activities in the cities of Missour and Outat El Haj on the quality of the surface waters of the average Moulouya (Morocco). The aim of this study is to evaluate in time and space, the degree of metallic pollution of surface water of the average Moulouya during the period (September 2014, January, April and July 2015). The results of this study suggest that the waters of the ten stations in the study area are relatively contaminated with heavy metals. The contents of the analyzed metals are high and variable in the wastewater of the cities of Missour and Outat El Haj and in the waters of the Moulouya average. The anthropogenic impact on the ecosystems selected for this work is highlighted by: the high metallic contamination of the water of the stations located downstream of wastewater discharges of the cities of Missour and Outat El Haj, and the variation of the contents according to an increasing concentration gradient from station M1 to M9.

Innovations in Smart Cities Applications Edition 3, 2020

E3S Web of Conferences, 2021

The climatic changes that the middle Moulouya region of Morocco has undergone in recent years, de... more The climatic changes that the middle Moulouya region of Morocco has undergone in recent years, demographic growth and the development of urbanization have led to a significant decrease in the reserves of water that can be mobilized for domestic and agricultural uses. This deficit, between availability and need for water, will only increase with the increasing needs of the water consuming sectors. The main objective is to follow the physical-chemical evolution of raw wastewater in the city of Outat El Haj. Sampling took place over 12 months (2014-2015). The physical-chemical study of urban discharges from the city of Outat El Haj made it possible to define the pollution ratio per inhabitant between 17 and 21 mg/hab.day with BOD5 concentration between 525 mg/l and 2125 mg/l and pH values near neutrality. The ratio COD/BOD5 is from 1.92 to 2.04, shows the biodegradability of effluents, and may be treated by a biological system such as stabilization ponds as found nationwide. The values...

E3S Web of Conferences, 2021

The Lake Sidi Boughaba is a Ramsar site (1980) located on the Atlantic coast of north-west Morocc... more The Lake Sidi Boughaba is a Ramsar site (1980) located on the Atlantic coast of north-west Morocco. It is oriented NNE - SSW and located in a secondary interdunal depression formed in a complex of the main wetlands of Morocco. The waters of this lake are deteriorating in quality, with increasing salinization. To identify the processes and chemical reactions that govern salinization, the main major elements as well as the pH, electrical conductivity and salinity were monitored during the winter and summer seasons of the years, 2016-2017 in 6 sites distributed throughout the year. The interpretation of the analysis data is carried out using the correlation of the major elements with the chlorides, the Piper diagram and the variation of the ionic ratios Na/Cl, SO4/Cl, Mg/Ca and the calculation of the saturation index. The saturation index is calculated by the software PHREEQC 2.8, used for modelling the state of saturation of minerals. The results of these analyzes revealed a variety o...

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

The adoption of an ecological sanitation system, meeting the requirements hygienic and sanitary, ... more The adoption of an ecological sanitation system, meeting the requirements hygienic and sanitary, constitutes a feasible and technically and economically acceptable solution in the future smart city. This new sanitation concept has the advantage of solving the problems of pathogens of human waste at source, thus offering the possibility of reusing them after treatment (recycling) in order to improve the standard of living of the population and protect the environment. The aim of this study is to evaluate the efficiency of a vertical Multi-Soil-Layering system (MSL) system to treat domestic wastewater under three hydraulic loading rates: 250 L/m 2 /day, 350 L/m 2 /day and 500 L/m 2 /day, in Moroccan conditions. To do this, a vertical MSL system measuring 20cm x 60cm x 78cm (L ×W× H) was designed to treat domestic wastewater and his performance was investigated. The results showed high removal of organic matters and nutrients under the three hydraulic loads tested; the performance averages recorded are upper than 84 % for organic matters, 83.1±7.2 % for ammonium and 72.4±14.1 % for orthophosphate. The quality of the treated wastewater was evaluated according to Moroccan reject limit value. Consequently, this system could be considered an effective solution to be adopted for decentralized domestic wastewater treatment in Moroccan conditions.

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

Domestic wastewater (toilet water and household water from kitchens) is evacuated in unit or sepa... more Domestic wastewater (toilet water and household water from kitchens) is evacuated in unit or separate networks to the purification station (STEP) in order to eliminate their waste; organic and mineral matter, dissolved and suspended before discharging them into the natural environment or reusing them in irrigation. The main purpose of this work is to operate the wastewater treatment plant in the Ben Slimane Airport area by using activated sludge, this process consists of destroying pollutants and microorganisms by bacteria formed in the clarifier. Moreover, the operation of the station was considered by controlling the sensors installed in each basin to promote their optimization, in addition, the physicochemical analysis was carried out in the STEP laboratory. The results found for the parameters studied showed the very effective reduction of the organic load of the wastewater treatment plant, so these values meet the discharge standards defined by Moroccan legislation.

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

The availability of land and the climatic conditions encouraged by the geographical situation of ... more The availability of land and the climatic conditions encouraged by the geographical situation of Morocco, have pushed this country to adopt since the 90s natural leaning as being the technical solution most suited to the economic and climatic context, thus, many treatment stations wastewater has already been carried out. In order to assess the performance of the natural lagoon-type treatment plant in the town of Outat El Haj, we studied the physicochemical parameters of the raw and purified water from the plant. For this, we carried out a set of measurements such as: Temperature, pH and Electrical Conductivity (EC) (parameters on site), Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Suspended Solids (TSS), Dissolved Oxygen, Hydrotimetric Titer (TH), Cl-Chloride, Organic Matter (OM), Orthophosphates, and Nitrates, in order to examine the reliability of this purification process in the study area. The purification yields observed in the treatment plant vary from 23 to 94.6% as an abatement for BOD5. This average yield varies between 22.3 and 89.8% for COD, between 22.6 and 90.6% for OM, and between 9.2 and 65.5% for suspended matter (suspended matter). The purification performance is negative to very low in nitrogen and Orthophosphates. The results of the analyzes showed that the purification yields of the natural lagoon-type station, low, variable and remain dependent on the season.

Interdisciplinary Perspectives on Infectious Diseases, 2020

Background. Leishmaniases are vector-borne diseases with health risks. They cause a big health pr... more Background. Leishmaniases are vector-borne diseases with health risks. They cause a big health problem. These parasitic diseases are transmitted by the parasite of the genus Leishmania through sandflies. Objective. The aim of this work is to study the distribution of the incidence of cutaneous leishmaniasis (CL) cases and the impact of urbanization and socioeconomic factors and their effects as leishmaniasis risk factors. Methods. We conducted a retrospective study of CL cases collected at the level of Sefrou Province during the period from 2007 to 2011. The data was collected from registers of the Medical Delegation of Sefrou Province. The socioeconomic data, namely, the poverty rate, the popular density, and the type of environment (urban/rural) of Sefrou Province, were obtained from the High Commission for Planning. Statistical analysis was performed by SPSS software (version 20). The data were registered in a Microsoft Excel 2010 file. Statistical analysis was based on one-way a...

Journal of Parasitology Research, 2020

Leishmaniasis diseases are endemic in Morocco. An entomological survey was conducted in Aichoun l... more Leishmaniasis diseases are endemic in Morocco. An entomological survey was conducted in Aichoun locality for 1 year from September 2013 to August 2014. The objective of this study was to investigate the sand fly fauna, mainly the species composition and the monthly species prevalence in accordance with bioclimate factors. Sand flies were collected twice a month, using sticky traps and CDC light traps. During a one-year study, 4472 specimens of sand fly were caught (72.56% male/22.44% female) that were composed of seven species divided into two genera: Phlebotomus (99.46%) and Sergentomyia (0.53%). Ph. sergenti was the most prevalent species (46.64%), followed by Ph. perniciosus (38.19%), Ph. longicuspis (9.32%), Ph. papatasi (5.23%), and Ph. ariasi (0.06%). The genus Sergentomyia was even less frequent. The population dynamics showed a bimodal trend with two peaks: the first one in October (12.03% of specimens) and the second in June (27.92% of specimens). The study of the effects o...

Indian Journal of Science and Technology, 2019

Objectives: The work is to evaluate and control the physicochemical quality of the groundwater in... more Objectives: The work is to evaluate and control the physicochemical quality of the groundwater in the medium Oulmes plate, to protect human health. Methods/Analysis: We have evaluated the quality of seven wells of the area of the plate of oulmes of the Moroccan Atlas during the year 2016; vary by carrying out the analysis for 16 physic-chemical and chemical parameters in the laboratory and "in situ". These parameters are pH, T, electric conductivity, salinity, potential of oxydoreduction, turbidity, dissolved oxygen, Ca 2+ , Mg 2+ , Na + , K + , Cl-, SO 4 2-, CO3 2and HCO 3-. These parameters are measured by the apparatus Hanna Instruments HI 98280 and Hach 2100 NTU, the anions and cations are measured by the atomic absorption. Findings: Electric conductivity 4110 µS/cm, salinity is worth 1 mg/l, turbidity 9 TNU, dissolved oxygen 6.63 mg/l, potential of oxydoreduction 118.9 mV, he concentration of calcium 300.7 mg/l, the potassium concentration 39.04 mg/l, the magnesium concentration 65.61 mg/l, the sulphate concentration 102.01 mg/l, nitrate concentration 10.34 mg/l, and bicarbonate concentration 1068 mg/l. Indeed, these got results reveal that the degree of pollution exceeds the threshold of the national and international standards of potability. Application: In front of this situation, this requires a control and a treatment to preserve the natural environment.

International Journal of Advanced Research, 2017