In spite of the abundance of water resources in the watershed of Khenchela region, the strong urban growth and the expansion of agricultural land resulted in a considerable increase in water needs. This fact exposed groundwater and surface vulnerability to an overlooked growing pollution.In this vein, this study aims to determine the global quality of groundwater oriented to drinking water supply in Khenchela city. It focuses particularly on looking for minerals, nutrients and salt concentration and to assess their spatial and temporal variability. This area has been the subject of several previous studies due to the importance of its watershed (hydrology, geology, geomorphology, bacteriology...). The dosage of the considered parameters revealed vulnerability of water of the North and the North Western part of the watershed to the strong mineralization and excess of organic minerals. This requires in the short term an obligation to treat this water before distribution. A permanent monitoring and the use of other evaluation means for quality protection of this vulnerable resource have been taken into account.
In the world, the water quality is undergoing deterioration due to urban and industrial wastes, and intensive use of chemical fertilizers in agriculture. Unfortunately, as in most countries of the world, Algeria is experiencing a severe crisis of its environment apart from the problem of depletion of water resources. The plain west of Annaba is particularly subjected to a general industrial pollution. The pollution problem in this region has really started to become worrying not earlier than in 1980, when the economic crisis has led some industrial units to sacrifice the “Environment” criterion for the benefit of the production. We were particularly interested in this work in waters of the superficial aquifer and wadis like Boudjemaa, Bouhdid, Sidi Harb, and Forcha whose waters are most often used to irrigate the surrounding agricultural land. Comparison of analytical results from two periods – 2006–2016 for the: EC, pH, Ca2+, Mg2+, Cl−, NO2 and 2006–2010 for the: Fe, Cr, Cu2+, Pb+ show a degradation of water quality in this region, which represents a very vulnerable area with a risk to pollution of groundwater.
The intrinsic vulnerability of groundwater aquifers refers to their sensitivity to all contamination coming from soil surface irrespective of the nature of the polluting. In order to improve the protection of groundwater, there must be a reduction in the infiltration of contaminants towards the reservoir through the impacting factors determination of this phenomenon by means of research. There are collected models that include particular number of factors which allow the determination of a sign of groundwater vulnerability of all superficial pollutions.The goal of the study centers on ascertaining the state of vulnerability and the risk of groundwater pollution of the Collo region with a new proposed method by Kherici. Generally, assessment methods of vulnerability and the danger of groundwater pollution employ parametric systems with numerical quotation, cartographic superposition where the analytical methods are based on equations. In this study, we consider the combination of criteria dependent on natural factors (thickness of the unsaturated zone, geologic facies, degree of auto-purification) and the causes of groundwater vulnerability to man-made pollution (anthropogenic factors).
Purpose This paper represents an analytical study conducted in the laboratory. The purpose of this paper is to monitor changes of some parameters related to water treatment in Hamman Bebagh (Bouhamdane Watershed). Design/methodology/approach This study was focused on three sites: river water, dam water and treated water during the first six months of 2014 (January-June). It included 16 physico-chemical parameters (PH, T, conductivity, etc.) and two bacteriological (E. coli, fecal streptococci). These parameters were analyzed to make a comparison between stagnant dam water (before and after treatment) and river water. Findings The obtained results over the whole period of analysis indicated that treated dam water was less loaded with organic materials, solids, dissolved salts (Cl−, Ca2+, and Mg2+) that were deposited at the bottom of the dam than dam water before treatment. On the other hand, river water was found to be more charged of suspended matter than the dam water and the treated water since flowing water carried all materials in its course. In terms of bacteriological quality, treated water was found to be free from all traces of bacteria analyzed that were present in the dam and the river before the treatment. Originality/value This study was proposed in order to see if it is necessary to establish a second treatment plant in the medium term. On the basis of this analysis, the end results have shown that the treatment plant was effective enough to reach the desired goal (treated water which respects the norms of OMS).
This study was conducted using quantitative methods of physicochemical and bacteriological analyses to investigate the chemical characterization of surface and groundwater from the Bouchegouf Aquifer (Algeria) and the delimitation of protective perimeters for catchment wells. The objective is to determine the impact of the various anthropogenic activities on the degradation of water quality and, therefore, the delimitation of protective perimeters for catchment wells. The analytical results have revealed a significant threat both to the receiving environment (Mellah and Seybouse streams) and the alluvial aquifer.Also, the pollutant load expressed by the elevated concentrations of specific physicochemical and bacteriological parameters, mainly at the discharge point of the yeast factory, can have harmful effects on fauna, flora, and human health (water-borne diseases), if they are present in large quantities. Furthermore, the simulation of underground flows showed that the groundwater was strongly affected by drainage from the Seybouse wadi. Hydrodispersive modelling highlights pollution risks which can be linked to the use of pesticides, domestic wastewater, and especially by discharge from the yeast factory. Additionally, road traffic can also cause a risk of accidental pollution.
The contamination of groundwater by toxic compounds even in low concentrations can compromise the exploitation of the resource for long periods. This work is in this theme. Indeed, the objective of this study is the determination of the impact of some heavy metals on the quality of water resources generated by the discharges of some industrial units in the region of El-Kalitoussa. The results obtained have identified the real threat of industrial pollution on the receiving environment (wells, boreholes and lake). However, the state of contamination of groundwater by heavy metals has been achieved by processing analytical results according to a methodology mono and bidimensional using computer tools. This metallic pollution is highlighted by an abnormally high average content in the majority of the analyzed water points for iron, lead and nickel. While copper has an average concentration at the tolerance limit. However, the highest concentrations of heavy metals measured show that the closer the wells and boreholes are to industrial waste, the more vulnerable they become to possible contamination.
The Oued Souf free aquifer located in the South East of Algeria represents the main water resource used mostly for urban and agricultural activities. The intensive use of chemical fertilizers has led to serious environmental problems such as contamination of the free aquifer in the region. Thus, aquifer vulnerability has been assessed using several different methods (DRASTIC, GOD, and the Susceptibility Index ‘SI’) based on a geographic information system (GIS). For each method, two vulnerability maps have been developed in the years 2002 and 2012. These maps show that the study area is more exposed to urban, and especially agricultural, pollution. Two classes of vulnerability (moderate and high) have been identified by both DRASTIC and GOD methods. A combined analysis reveals that the moderate class showing 48% (for the GOD method), and the high class showing 57% (for the DRASTIC method) are the most dominant. However, the Susceptibility Index method (SI) revealed that the vulnerability varies from moderate to very high-level classes. In 2012, about of 53% of the study area was dominated by moderate vulnerability classes. The high vulnerability class also includes a considerable part of the land (41%) around urban or strongly agricultural areas, while only 6% is under very high vulnerability groundwater contamination. In addition, a marked decrease in the vulnerability level was noticed in 2012 compared to 2002. This decrease is mainly due to the lowering of the water table after the installation of a vertical drainage network to evacuate the surplus water to the depression and Chotts areas in the North of the region. These results provide a guide for decision-makers involved in the protection of groundwater pollution in such a vulnerable area.
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