Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Application of Water Quality Index to Assess the Potability of the Phreatic Aquifer in Ouargla (Algeria)

Hammad Nabila, Bouselsal Boualem, Boussaada Nawel, Satouh Adel, Lakhdari Alia Sara

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 5

36--45

Groundwater is essential for sustainable development and drinking water supply in the Saharan regions. This work aims to assess the quality of water for domestic use and the hydrogeochemical characteristics of the phreatic aquifer of the Ouargla. Forty-two (42) wells capturing the phreatic aquifer are sampled and analyzed. The parameters analyzed are pH, EC, TDS, cations and anions. The water’s potability was evaluated using the Water Quality Index (WQI) method, using the main physicochemical parameters that have potential adverse effects on human health. The results obtained show three classes: the poor class (14.29%), the very poor class (19.04%), and the non-potable class (66.67%). The analysis of the Piper and the Gibbs diagrams, the Pearson correlation matrix and the diagrams of relationship between the major elements, as well as the indices of saturation of the main minerals, shows that the groundwater samples were arranged into two groups; Ca-Mg-SO4 -Cl (38.5%) and Na-Cl (61.5%), the geochemical processes occurring in the aquifer mainly include the dissolution of halite, gypsum, the cation exchange between water and clay minerals and anthropogenic inputs.

Determination of Groundwater Vulnerability Using the DRASTIC Method in Ouargla Shallow Aquifer (Algerian Sahara)

Satouh Adel, Boualem Bouselsal, Chellat Smaine, Benaabidate Lahcen

Journal of Ecological Engineering

2021

Vol. 22, nr 6

12--19

Groundwater is the main source for many uses around the city of Ouargla. In this study, the DRASTIC method was used to assess the vulnerability of the groundwater aquifer. Seven hydrogeological parameters of the model (D water depth, R efficient charging, A aquifer type, S soil type, T topography, I unsaturated zone and C hydraulic conductivity) were measured and mapped. The intrinsic vulnerability map of the shallow aquifer, using the DRASTIC method, shows a high to very high vulnerability to pollution; 91.6% of the study area has high vulnerability, 8.4% of it has very high vulnerability. The comparison of the DRASTIC maps with the land use map illustrates that the agglomerations and irrigated areas are the most vulnerable areas to pollution, due to the low depth of the aquifer and the infiltration of significant domestic and irrigation wastewater. The results show that the relationship coefficient between the DRASTIC index and nitrate concentration is R = 0.73. This indicates that the groundwater vulnerability mapping by using the DRASTIC method can be applied for sensible groundwater resources management and land-use planning in the study area.