Hydrogeological studies on some areas in the New Valley Governorate, Western Desert, Egypt
Ahmed Mostafa Seif EI-Nasr;
Abstract
ABSTRACT
A regional groundwater flow model for the Nubian Sandstone Aquifer System in Egypt was
developed. Then this model was calibrated using the available hydrogeological data from the observation wells. The validated regional model is then considered as the base model in which the grids can be refined at any Oasis to involve the detailed hydrogeological data. Such local scale (or the refined grid) model is then used for the prediction of the impact of a certain water policy in the next hundred years. To achieve this target the following steps were completed before the stage of model development:
1. Hydrogeological data collection: In this step, a complete database of the hydrogcological and drilling information of 850 water wells drilled in the period 1960-2000 was formulated. These data were collected from different sources including Groundwater Center in Kharga, Branch of National Academy of Science in Kharga, Geology Department of Martin-Luther University in Germany and all the previous published literatures (e.g. Ezzat, 1974, 1976). Since these data are present in different format, its processing and handling took two years to be prepared for the model parameters input. Some of these data were reinterpreted to estimate the hydraulic and hydrogeochemical parameters of the Nubian Sandstone Aquifer System.
2. Model development ~nd calibration: A time-dependent numerical model for
the Nubian Aquifer System in Egypt was developed. Groundwater flow in this Aquifer was simulated for different periods 1960-1980, 1960-1990, where the digitized groundwater contours of Ball, (1927) were considered as the initial conditions and the artificial groundwater extractions in these periods were imposed. The resulted groundwater contours for 1980,1990 were compared to observed groundwater contours. The transmissivity and storage· coefficient were adjusted within the allowable limits until a good match was obtained between observed and calculated hydraulic heads.
A regional groundwater flow model for the Nubian Sandstone Aquifer System in Egypt was
developed. Then this model was calibrated using the available hydrogeological data from the observation wells. The validated regional model is then considered as the base model in which the grids can be refined at any Oasis to involve the detailed hydrogeological data. Such local scale (or the refined grid) model is then used for the prediction of the impact of a certain water policy in the next hundred years. To achieve this target the following steps were completed before the stage of model development:
1. Hydrogeological data collection: In this step, a complete database of the hydrogcological and drilling information of 850 water wells drilled in the period 1960-2000 was formulated. These data were collected from different sources including Groundwater Center in Kharga, Branch of National Academy of Science in Kharga, Geology Department of Martin-Luther University in Germany and all the previous published literatures (e.g. Ezzat, 1974, 1976). Since these data are present in different format, its processing and handling took two years to be prepared for the model parameters input. Some of these data were reinterpreted to estimate the hydraulic and hydrogeochemical parameters of the Nubian Sandstone Aquifer System.
2. Model development ~nd calibration: A time-dependent numerical model for
the Nubian Aquifer System in Egypt was developed. Groundwater flow in this Aquifer was simulated for different periods 1960-1980, 1960-1990, where the digitized groundwater contours of Ball, (1927) were considered as the initial conditions and the artificial groundwater extractions in these periods were imposed. The resulted groundwater contours for 1980,1990 were compared to observed groundwater contours. The transmissivity and storage· coefficient were adjusted within the allowable limits until a good match was obtained between observed and calculated hydraulic heads.
Other data
| Title | Hydrogeological studies on some areas in the New Valley Governorate, Western Desert, Egypt | Other Titles | دراسات هيدروجيولوجية لبعض المناطق لمحافظة الوادى الجديد، الصحراء الغربية،مصر | Authors | Ahmed Mostafa Seif EI-Nasr | Issue Date | 2002 |
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