El-Qaa plain in the South Sinai is one of Egypt’s promising regions for sustainable development. The groundwater forms the primary sources of development in this region. The present study aims to identify the groundwater resources in El-Qaa plain area, Southern Sinai, Egypt. ASTER-TIR indices (Carbonate Index, Quartz Index, and Mafic Index) combined for the first ones with geophysical and geospatial data using fuzzy overlay spatial model (FOSM) to define the potential zones of groundwater in the area of study. The resultant model was tested and validated using the available well data of groundwater in the area of study. The results revealed that over 65% of EL-Qaa area is high to moderate with groundwater potentiality. The favorable areas for groundwater storing are nearly situated in the areas of high infiltration (high pixel values of carbonate and quartz indices) in the northwestern part of EL-Qaa area. Also, the regions in the central western, mid, and northeastern portions of the area of study where fractured rocks are dominant and reasonably higher rainfall. The results demonstrated the potential capacity of ASTER-TIR indices to assess groundwater potential in arid and semi-arid regions when integrated with other geospatial data as a reconnaissance tool.

西西奈南部的基地基地是埃及可持续发展的有希望的地区之一。地下水是该地区发展的主要来源。本研究的目的是确定埃及西奈南部El-Qaa平原地区的地下水资源。首先使用模糊叠加空间模型（FOSM）将ASTER-TIR指数（碳酸盐指数，石英指数和黑手党指数）与地球物理和地理空间数据相结合，以定义研究区域内地下水的潜在区域。使用研究区域中可用的地下水井数据对所得模型进行了测试和验证。结果表明，EL-Qaa地区超过65％的区域具有地下水潜力，为高至中度。EL-Qaa地区西北部的地下水入渗有利区域几乎位于高渗透区（碳酸盐和石英指数的高像素值）。此外，在研究区域的中西部，中部和东北部地区，裂隙岩石占主导地位，降雨量较高。结果表明，与其他地理空间数据作为侦察工具集成在一起时，ASTER-TIR指数具有评估干旱和半干旱地区地下水潜力的潜在能力。