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Ain Shams University (2017)

HYDROLOGIC MODELING AND ENVIRONMENTAL MANAGEMENT OF GROUNDWATER RESOURCES WADI EL FARIGH AREA EGYPT

Omar, Mona Mohamed Mostafa

Titre : HYDROLOGIC MODELING AND ENVIRONMENTAL MANAGEMENT OF GROUNDWATER RESOURCES WADI EL FARIGH AREA EGYPT

Auteur : Omar, Mona Mohamed Mostafa.

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Environmental Sciences 2017

Résumé partiel
Wadi El Farigh area is built up of sedimentary rocks belonging to the Tertiary and Quaternary times. They are formed of different rock units composed of sands, gravels and clays. The Lower Miocene rocks are exposed in most of the studied area. The main water bearing formation in the studied area is the Lower Miocene aquifer. The groundwater exists under unconfined conditions. The Lower Miocene aquifer rests unconformably on the basalt sheets of the Oligocene age and the saturated thickness ranges from 110 m to 330 m. The average relative humidity in winter season reaches 64.5 %, while it reaches 59.2 % in summer season. Average wind speed in winter season reaches 3 m/sec, while it reaches 3.4 m/sec in summer season. The amounts of rainfall rate reaches 238.8×106 m3/year. The studied area falls within the Desert Zone. The total of the actual evapotranspiration reaches 133.23 × 106 m3/ year. The soils of the studied area are classified according to the obtained hydraulic conductivity values into four zones, moderately slow hydraulic conductivity, moderately rapid hydraulic conductivity, rapid hydraulic conductivity and, very rapid hydraulic conductivity. Discharge is evaluated to be about 90.31 × 106 m3 for the summer season and 57.51 × 106m3 for the winter season with total amount of 147.82 × 106m3 / year. The local recharge of the Lower Miocene aquifer takes place through lateral seepage from the West Nile Delta aquifer in the eastern part and lateral flow from the Oligocene aquifer in the western part. In the northern part, local recharge of the Lower Miocene aquifer in the studied area takes place from lateral leakage from the Pliocene aquifer, while in the southern part there is no source of recharge. The groundwater of Lower Miocene aquifer is the main source for agricultural and domestic purposes in the studied area. However, due to an imbalance of groundwater regime in the lower Miocene aquifer, it was necessary to carry out a detailed scientific research to protect and manage the groundwater resources in the studied area quantitatively and qualitatively. One major target is to prevent the lowering in the groundwater level which may lead to deterioration in groundwater quality. The present study aims to develop groundwater flow model to manage the groundwater resources in the Lower Miocene aquifer in the studied area for the year 2013, and to predict the hydrological situation up to the year 2024 and 2034, as well as to evaluate the water budget.

Présentation étendue (EULC)

Page publiée le 11 février 2019