Mehaiguene Madjid | Université De Khemis Miliana Ude Km Algéria (original) (raw)

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Papers by Mehaiguene Madjid

Agricultural Science Digest – A Research Journal, Oct 7, 2022

Background: This study aims was to assess the water quality and efficiency of the Ouled Mellouk d... more Background: This study aims was to assess the water quality and efficiency of the Ouled Mellouk dam treatment plant (North Western Algeria). This plant consists of conventional water treatment units, like other treatment plants in Algeria, these were coagulationfloculation, sedimentation, filtration and disinfection. Methods: The study was based on analyzes and monitoring of the main physico-chemical and bacteriological parameters of raw and treated water monthly from January to December 2018. Result: Raw water has relatively high hardness (49F). Turbidity was high (23.93 NTU), manganese has a max of 0.407 mg/l.These values exceeded the Algerian standards limits. Nutrients and organic matter were in increase and coliforms were present with high levels. All analysed parameters were in decrease in treated water, with the exception of sulphate which was in increase and they were within the Algerian standards. The plant has a moderate removal efficiency of 48%, with a high removal effeciency of coliforms (100%), of turbidity (94.62%) and manganese (88.69%).

Precipitation tendencies analyses have been of great concern during the past century, mainly beca... more Precipitation tendencies analyses have been of great concern during the past century, mainly because of the attention given to global climate change from the scientific community. Along with trends in rainfall amount, precipitation fluctuations play a dominant role in a number of water related issues, especially for those areas, such as the Mediterranean basins, hugely characterized by an extreme rainfall variability and stressed by the combination of a dry climate and an excessive water demand. In this paper, a preliminary analysis aimed at the characterization of inter-annual and intra-annual precipitation variability, is reported for two study region, experiencing a typical Mediterranean climate.

This work aims to assess the quality of water dams based on the monitoring of physicalchemical pa... more This work aims to assess the quality of water dams based on the monitoring of physicalchemical parameters for a period of 10 years (1999-2008). Quality sheets of dam water in the region of Upper Cheliff (Ghrib, Deurdeur, Harreza and Ouled Mellouk) show a degradation of the quality over time. Indeed, the registered amount of COD often exceeds 50 mg/ l, and the OM also exceeds 15 mg/l. The waters of dams show a very high salinity (TDS = 2574 mg/l in 2008 for the waters of the dam Ghrib, standard = 1500 mg/l).The concentration of nitrogenous substances (NH4, NO2) in water is high in 2008 at Ouled Mellouk dam. On the other hand, we studied the relationship between the evolution of quality parameters and filling dams. We observed a decrease in the salinity and COD following an improvement of the filling state of dams. While increased levels of nitrates and phosphorus in the waters of four dams studied during the rainy season compared to the dry period.

World Academy of Science, Engineering and Technology, International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering, 2017

In the face of ever-increasing water scarcity and the scarcity of rainfall, the use of treated wa... more In the face of ever-increasing water scarcity and the scarcity of rainfall, the use of treated water for agricultural purposes is proving to be one of the non conventional solutions that may even solve the problem of lack of water irrigation in the region and alleviate the recorded water deficit. In this work, we have calculated the potentially irrigable areas from the quantities of treated wastewater and the water requirements of the different types of crops grown in the Arib perimeter. A comparison between the irrigable areas and those actually cultivated in the perimeter allowed us to note that an unconventional water resource of the Ain Defla station evaluated at 2747 m3/day (82410 m3/month) allows to irrigate the majority of the area occupied by vegetable crops grown (tomato, onion, ...) namely 213 ha. While it will satisfy only 12% of the actual area occupied by the potato. In the case of fruit trees, the water resource will satisfy only 50% of the citrus fruits or 42% of the ...

World Academy of Science, Engineering and Technology, International Journal of Agricultural and Biosystems Engineering, 2015

More than 56227 km 2 or 22% of the North Algéria area, stretching between the Mediterranean Sea i... more More than 56227 km 2 or 22% of the North Algéria area, stretching between the Mediterranean Sea in the North and the Atlas Saharan in the south. The basin of Cheliff-Zahrez presents a compartmentalised relief, reflection of the clear topographic opposition Telheight plateau. It is just juxtaposed with the other hydrological units which also covering the lower and higher plains: the basins of Algiers -Soummam-Hodna in the East and the basin Orani-Chott Chergui in the West. The precipitation in the basin varies from 200 to 600 mm/year; it is concentrated on the south sides of the both mounts: Dahra and the Zaccar, the maximal yearly rainfall is about 700 mm, while it hardly passes the 100 mm in the Zahrez basin (arid zone).

Algeria and in particular the western part has experienced several periods of drought during this... more Algeria and in particular the western part has experienced several periods of drought during this century. The last one was characterized by its intensity and its significant impact on water resources and crop yields. The decrease in rainfall associated with the significant increase in temperature over the past two decades has affected cereal yields in general and durum wheat in particular. Studies of drought are many and varied; several authors have studied the rainfall deficit and its impact on water resources. Analysis of the recurrence and persistence of this phenomenon by scientific methods seeks to make an estimation of the probabilities, which could contribute to the planning of water resource management and mobilization strategies.

Low flow hydrological regimes and their characterization are crucial for an efficient development... more Low flow hydrological regimes and their characterization are crucial for an efficient development of water resources management tools, especially in those areas stressed by the combination of a dry climate and an excessive water demand, such as the Mediterranean basins. Consequently, a lot of effort has been made by the worldwide scientific community toward the prediction of low flows features in ungauged catchments. The aims of the present study are: (1) the quantification of low flows characteristics, both at the annual and seasonal scale, in particular with regard to the BFI, one of the most important low flow features, and (2) the application of a simple regional approach to predict the BFI at ungauged sites. The investigated area is located in North West Algeria and has an extension of about 130000 Km 2 . The relevant extension and the poorly dense monitoring network, which consist in 24 hydrometric stations, require the identification of homogeneous regions, for further application of simple linear regional regression models. Regions delineation is accomplished through the Principal Component Analysis method (PCA) and the cluster analysis, based on geographic, physiographic and climatic data. Five homogeneous and geographically contiguous areas have been identified, and comparisons between global and local regional linear regression models, indicate a large percentage of BFI which explain variance in each area.

Geographia Technica

Our study focuses on the regionalization of rainfall in northwestern Algeria. This region is the ... more Our study focuses on the regionalization of rainfall in northwestern Algeria. This region is the most affected by rainfall reduction since the second half of the 1970s. The regionalization of spatial variability of precipitation is studied over two separate periods in order to improve the quality of information. Two statistical techniques were used, i.e., the Principal Components Analysis with rotation and the non-hierarchical clustering (k-means clustering). The regionalization of rainfall using 46 stations with 74 years of observations allowed us to identify four groups characterizing the different climatic regions in the studied area. To refine this regionalization, we have introduced new stations (182 stations) with a shorter period of observation (36 years, from 1968 to 2003). This new procedure allowed us to highlight new regional groups. The homogeneity test of Krauss (1977) improved by Fernandez Mills et al. (1994) showed some weakness in the homogeneous structure of rainfall fields of these groups, especially the temporal component. The major element in limiting these groups is the longitude (the correlation coefficient between this parameter and rain is of the order of 0.66). To show the influence of the distance from the Mediterranean Sea and the altitude, the K-means clustering technique was applied on each one of these six groups. This procedure allowed us to divide the region into twelve groups. The homogeneity became clearer except in the groups where the temporal variability of rainfall is significant, which caused the reduction of Krauss coefficient value. When using this technique in these groups, we have demonstrated the importance of the longitude, the distance from the Mediterranean Sea and the topography characterized by its altitude in the regionalization of rainfall on an annual basis.

Environmental Earth Sciences, 2014