Groundwater and Characteristics of the Tertiary-Quaternary Aquifer System West of Mallawi, Upper Egypt

2021 ◽  
pp. 153-175
Author(s):  
Sawsan Moselhy Mohamed Ibrahem
Keyword(s):  
Upper Egypt ◽  
Quaternary Aquifer ◽  
Aquifer System

Hydrochemical evaluation of the quaternary aquifer and its suitability for different purposes at south Al Waqf city, Qena, Upper Egypt

2021 ◽  
Vol 12 ◽  
pp. 100517
Author(s):  
Ahmed A. Elnazer ◽  
El-Montaser M. Seleem ◽  
Salah A.M. Zeid ◽  
Ismail S.A. Ismail ◽  
Hossam A. Bahlol ◽  
...  
Keyword(s):  
Upper Egypt ◽  
Quaternary Aquifer

The legacy and drivers of groundwater nutrients and pesticides in an agriculturally impacted Quaternary aquifer system

2021 ◽  
Vol 753 ◽  
pp. 142010
Author(s):  
Haile A. Shishaye ◽  
Douglas R. Tait ◽  
Damien T. Maher ◽  
Kevin M. Befus ◽  
Dirk Erler ◽  
...  
Keyword(s):  
Quaternary Aquifer ◽  
Aquifer System

scholarly journals Groundwater Quality Assessment of a Multi-Layered Aquifer in a Desert Environment: A Case Study in Wadi ad-Dawasir, Saudi Arabia

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3020
Author(s):  
Alaa A. Masoud ◽  
Ali A. Aldosari
Keyword(s):  
Saudi Arabia ◽  
Groundwater Quality ◽  
Climatic Factors ◽  
International Standards ◽  
Total Hardness ◽  
Integrated Analysis ◽  
Rock Interaction ◽  
Quaternary Aquifer ◽  
Aquifer System ◽  
Total Dissolved Solid

Sustainable management of groundwater in desert environments dictates better knowledge of the quality status and the controlling processes. To this end, an integrated analysis of hydrochemical and statistical assessment was carried out for 692 groundwater samples collected from the multi-layered aquifer system in Wadi ad-Dawasir area (Saudi Arabia). The four water-bearing formations arranged upwards, namely Lower Wajid, Upper Wajid, Khuff-Kumdah, and Quaternary, were investigated. The prime objective was to delineate the baseline conditions and the dominant process controlling the groundwater evolution that can help make resource management better. We used fifteen indicators, namely the total dissolved solid (TDS), total hardness, Eh, pH, temperature °C, turbidity, Fe2+, dissolved oxygen (DO), NH4, HCO3−, NO3−, F, NO2−, PO42−, and SiO2. Descriptive statistics, violation of the international standards, geostatistical modeling, and factorial analyses (FA) were performed. Geologic, soil, topographic, and climatic factors controlling the quality were investigated. The Quaternary aquifer was the most polluted by TDS, total hardness, NO3−, SiO2, Fe2+, F, and HCO3−. Khuff-Kumdah showed largest means of DO and NH4. Upper Wajid was the largest in NO2−. Lower Wajid proved largest in PO42−. Violation of the international standards clarified largest emergence of the pH for the Lower Wajid; Fe2+ and NO3− for the Upper Wajid; and total hardness, TDS, Fluoride, turbidity, and NH4 for the Quaternary aquifer. Rock interaction and evaporation are the dominant processes that contributed largely to the hydrochemical evolution of the groundwater. FA distinguished six main factors that explained for over 60.8% of the total groundwater quality variation lead byF1 (44.23%) that clarified strong positive loads of TDS (0.98), total hardness (0.95), nitrate NO3− (0.84), turbidity (0.78), NH4 (0.67), moderately loaded by fluoride (0.47), and Fe2+ (0.31).

scholarly journals Pumping optimization of coastal aquifers using probabilistic search – case study: Quaternary aquifer of El-Arish Rafah, Egypt

2019 ◽  
Vol 51 (1) ◽  
pp. 90-104
Author(s):  
Hamdy A. El-Ghandour ◽  
Emad Elbeltagi
Keyword(s):  
Coastal Aquifers ◽  
Search Algorithm ◽  
Optimization Technique ◽  
Computation Time ◽  
Global Solutions ◽  
Quaternary Aquifer ◽  
Aquifer System ◽  
Probabilistic Search ◽  
The North ◽  
Groundwater Basins

Abstract The increased pumping of freshwater from coastal aquifers, to meet growing demands, causes an environmental problem called saltwater intrusion. Consequently, proper management schemes are necessary to tackle such a situation and permit the optimal development of coastal groundwater basins. In this research, a probabilistic search algorithm, namely Probabilistic Global Search Lausanne (PGSL), is used to calculate optimal pumping rates of unconfined coastal aquifer. The results of using PGSL are compared with a stochastic search optimization technique, Shuffled Frog Leaping Algorithm (SFLA). The finite element method is applied to simulate the hydraulic response of the steady state homogenous aquifer. The lower and upper (LU) decomposition method is adapted to invert the conductance matrix, which noticeably decreases the computation time. The results of both the PGSL and the SFLA are verified through the application on the aquifer system underlying the City of Miami Beach in the north of Spain. Multiple independent optimization runs are carried out to provide more insightful comparison outcomes. Consequently, a statistical analysis is performed to assess the performance of each algorithm. The two optimization algorithms are then applied on the Quaternary aquifer of El-Arish Rafah area, Egypt. The results show that both algorithms can effectively be used to obtain nearly global solutions compared with other previous published results.

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