Specifying the hydrogeological parameters range for a groundwater flow model in El-Qaa Plain aquifer, Sinai, Egypt

Abstract Hydrogeological parameters are very uncertain to specify in the groundwater flow models. Hence, it is important a range for these be further utilized by model users. In El-Qaa Plain, previous researchers have determined hydrogeological such as transmissivity, hydraulic conductivity, and mean annual recharge rate using geophysical methods, pumping tests, hydrological models, However, they also limited specific locations do not spatially distribute. this paper, an effort has been accomplished aquifer inverse modeling taking into account spatial heterogeneity. These ranges could taken consideration during flow. finite-difference applied ModFLOW model. Regularized pilot points method (RPPM) chosen technique accurate values of parameters. Model-independent parameter estimation uncertainty analysis (PEST) estimate The results show that geometric conductivity study area from proximity 1 2 m/day. Additionally, transmissivity nearly 200 500 m /day. A relationship between determined. Besides, maps generated showing heterogeneity conductivity. modelers predict potential pollution future.