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Contribution of Hydrogeochemical and Isotopic Tools to the Management of Upper and Middle Cheliff Aquifers

Journal of Earth Science 2020年第5期31卷 993-1006页

作者： Madene Elaid meddi hind Boufekane Abdelmadjid meddi Mohamed National Higher School for Hydraulics LGEE-ENSH BlidaAlgeria

In the alluvial aquifers of Upper and Middle Cheliff(North-West Algeria), the groundwater quality is deteriorating. The objective of this study was to characterize the physical and chemical properties of these aquifers;and to evaluate the groundwater quality and its appropriateness for drinking and agricultural use. An investigation was carried out by estimating of the physiochemical parameters(Ca^2+, Mg^2+, Na^+, K^+, Cl^-, SO4^2-, HCO3^-, NO3^-, Br^- and TDS) to identify the chemical characteristics of groundwater. Morever, the isotopic composition was examined to identify the sources of recharge of these aquifers. The groundwater geochemistry for the high water level(May, 2012 and June, 2017) and low water level(November, 2012 and October, 2017) was studied. Accordingly, water samples from 39 water sampling points were collected(October, 2017 and June, 2018), for the purpose of analyzing stable isotopes(18O, 2H). The results show that the groundwater is mainly characterized by Ca-Cl and Na-Cl type. The chemical quality of the water is from fair to poor with the presence of nitrates used in agricultural and urban discharge. Also, the Br/Cl ratio gives indications on the origin of the salinity. This salinity is due to the leaching of chlorinated fertilizers, the dissolution of evaporite deposits and the rise of deep salty water by the fault of Chellif. While, the diagram of δ2H=f(δ18O) indicates that the origin of the recharge of these aquifers is the Atlantic and Mediterranean oceanic meteoric rainwater.

关键词： hydro-chemistry management isotopic analysis groundwater Upper and Middle Cheliff Algeria

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Estimation and inter-comparison of infiltration models in the agricultural area of the Mitidja Plain, Algeria

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Journal of Arid Land 2023年第12期15卷 1474-1489页

作者： Amina MAZIGHI hind meddi Mohamed meddi Ishak ABDI Giovanni RAVAZZANI Mouna FEKI Higher National School of Hydraulics of Blida Blida 09000Algeria Department of Civil Engineering and Hydraulics University of JijelJijel 18000Algeria Department of Civil and Environmental Engineering Polytechnic University of MilanMilan 20133Italy

Infiltration is an important part of the hydrological cycle, and it is one of the main abstractions accounted for in the rainfall-runoff modeling. The main purpose of this study is to compare the infiltration models that were used to assess the infiltration rate of the Mitidja Plain in Algeria. Field infiltration tests were conducted at 40 different sites using a double ring infiltrometer. Five statistical comparison criteria including root mean squared error(RMSE), normalized root mean squared error(NRMSE), coefficient of correlation(CC), Nash-Sutcliffe efficiency(NSE), and Kling-Gupta efficiency(KGE) were used to determine the best performing infiltration model and to confirm anomalies between predicted and observed values. Then we evaluated performance of five models(i.e., the Philip model, Kostiakov model, Modified Kostiakov model, Novel model, and Horton model) in simulating the infiltration process based on the adjusted performance parameters cited above. Results indicated that the Novel model had the best simulated water infiltration process in the Mitidja Plain in Algeria. However, the Philip model was the weakest to simulate the infiltration process. The conclusion of this study can be useful for estimating infiltration rate at various sites using a Novel model when measured infiltration data are not available and are useful for planning and managing water resources in the study area.

关键词： infiltration rate infiltration model double ring infiltrometer Mitidja Plain Novel model

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The Precipitation Concentration in the Cheliff Watershed, Algeria:A Critical Analysis for Sustainable Water Resource Management

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Chinese Journal of Urban and Environmental Studies 2023年第3期11卷 6-38页

作者： Samiha BRAHIMI hind meddi Mohamed meddi Faiza HALLOUZ Abdelamir SAAED HAMOUDI Department of Hydraulics Faculty of Civil Engineering and Architecture Hassiba Benbouali University of Chlef LGEE Laboratory Higher National School of Hydraulics GEE Laboratory Blida 3. Djilali Bounaama University of Khemis Miliana

In this study, a statistical analysis of historical and projected values of the annual, seasonal, and supra-seasonal precipitation concentration index(PCI) was conducted for different stations in the Cheliff watershed. Statistical methods such as breakpoint and trend analysis using Pettitt and Mann–Kendall tests were used for the PCI values of annual, monthly, and supra-seasonal precipitation data between 1950 and 2014. The PCI values varied between 14.24% and 24.86% annually, between10.75% and 18.74% seasonally, and between 11.23% and 26.98% supra-seasonally. According to the Pettitt and Mann–Kendall tests, there was an insignificant change in precipitation distribution during the study period. Spatial analysis using the inverse distance weighting(IDW) method confirmed the minor variability in precipitation distribution in the study area. The Pearson correlation coefficient between oscillation indices and PCI values at different scales showed significant values with the Mediterranean Oscillation index(MOi), North Atlantic Oscillation(NAO), and Western Mediterranean Oscillation index(We MOi), highlighting their potential influence on annual PCI values. For the climate projection scenarios, projected PCI values align with historical PCI values. Application of Pettitt and Mann-Kendall tests to the projected PCI series shows that there will not be a significant change in future precipitation distribution.

关键词： PCI Cheliff trend analysis breakpoint IDW climate projection scenarios.

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