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Ain Shams University (2021)

SUSTAINABLE GROUNDWATER MANAGEMENT IN SOUTH EASTERN DELTA FRINGES /

Emam,Enass Ahmed Elimy

Titre : SUSTAINABLE GROUNDWATER MANAGEMENT IN SOUTH EASTERN DELTA FRINGES /

Auteur : Emam,Enass Ahmed Elimy

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Civil Engineering 2021

Résumé
Groundwater resources planning, as a part of the water resources management, is strongly interrelated to the other planning areas (Agricultural, Industrial, Urbanization development). Accordingly, the multiplicity of objectives formulated from these perspectives has strong implications for the planning and development of groundwater. Eastern Nile delta region is considered one of the highest development areas in Egypt for more than the last forty decades. South Eastern Nile delta fringes especially will be selected to be the area of interest. Special attention will be given to the existing large reclamation lands (surface water, and/or groundwater reclamation lands) in both low and high rolling desert lands. where the low ones are located south and adjacent to the Ismailia canal. Under the expected stress of extensive shortage in surface water of the Nile water system, rapid population, and urbanization, accordingly, there is an importance of the global water resources planning such as groundwater can be used conjunctively with surface water and unconventional resources (treated drainage and waste water). The main issue addressed in this research is to manage the Nile Delta aquifer operation during a water crisis for the sustainability of the water resources and existing large reclamation projects (mainly based on surface water). Therefore, this work aimed to 1) Set up groundwater development strategies during the water crisis which is accompanied by reduction of inflow of the river and its branches in the flood plain of Eastern Nile Delta. 2) Obtain a recommended strategy for groundwater development in the area of interest for the safe operation of the aquifer, maintaining the sustainability of water resources. In the current research, integration of GIS and remote sensing (RS&GIS) was used in the South Eastern Nile delta region to monitor the change in land use/cover and to assess the change in the agricultural lands in the desert areas. Three satellite images for years 1992, 2002, 2015 were used to produce the land use/cover maps using the maximum likelihood method by selecting four classes for land cover (Agricultural, water, desert, and urban). The accurate assessment of the land use classification was evaluated and three maps for change detection analysis were produced between the years (1992-2002), (2002-2015), and (1992-2015). The final assessment concluded that the area of agricultural lands of the existing reclamation projects started before 1992 were increased by 17527.6 (feddan) from the year 1992 to 2015 while the reclamation lands that planned by the Land master plan from (1992 to 2017) were to 115436 feddan for the same period of years. This research depended on the numerical flow model as a helpful and strong tool to test several scenarios under three strategies to assess the impacts of such strategies on the groundwater system during the expected shortage of surface water. A three-dimension groundwater model (visual MODFLOW.pro) was applied considering the prevailing condition of hydrogeological conditions of the aquifer characteristics, the Hydraulic properties of irrigation and drainage system & expected changes under expected water shortage, and the change of land use.

Présentation étendue (EULC)

Page publiée le 25 mars 2022