|
|||||
|
|
Groundwater resource sustainability in the Wadi Watir delta, Gulf of Aqaba, Sinai, Egypt |
|
| Authors: | Mustafa A Eissa James M Thomas Greg Pohll Ronald L Hershey Kamal A Dahab Maher I Dawoud Abdelfattah ElShiekh Mohamed A Gomaa |
| Institution: | 1. Desert Research Center, Division of Water Resource, Matariya, Cairo, Egypt 2. Desert Research Institute, Division of Hydrologic Sciences, Reno, NV, USA 3. Faculty of Science, Geology Dept., Menoufiya University, Monufia, Egypt |
| Abstract: | The Wadi Watir delta, in the arid Sinai Peninsula, Egypt, contains an alluvial aquifer underlain by impermeable Precambrian basement rock. The scarcity of rainfall during the last decade, combined with high pumping rates, resulted in degradation of water quality in the main supply wells along the mountain front, which has resulted in reduced groundwater pumping. Additionally, seawater intrusion along the coast has increased salinity in some wells. A three-dimensional (3D) groundwater flow model (MODFLOW) was calibrated using groundwater-level changes and pumping rates from 1982 to 2009; the groundwater recharge rate was estimated to be 1.58?×?106 m3/year. A variable-density flow model (SEAWAT) was used to evaluate seawater intrusion for different pumping rates and well-field locations. Water chemistry and stable isotope data were used to calculate seawater mixing with groundwater along the coast. Geochemical modeling (NETPATH) determined the sources and mixing of different groundwaters from the mountainous recharge areas and within the delta aquifers; results showed that the groundwater salinity is controlled by dissolution of minerals and salts in the aquifers along flow paths and mixing of chemically different waters, including upwelling of saline groundwater and seawater intrusion. Future groundwater pumping must be closely monitored to limit these effects. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |