نمذجة موارد المياه في الدلتا باستخدام الاستشعار عن بعد ونظم المعلومات الجغرافية

Water has become a critical issue because of its scarcity all over the world. Water scarcity obstacles the development of urban expansion. Egypt is one of the most countries that suffer from water shortage problems. Egypt is one of the riparian States on the Nile River as a downstream country with a fixed share of the Nile water reaching about 55.5 billion cubic meters (BCM)/year. Evapotranspiration (ET) constitutes a large portion of the hydrologic cycle and considered as the important parameter in the water budget in the arid areas. Estimation of evapotranspiration is a major component of water resources management. Traditional techniques of calculating daily evapotranspiration based on field measurements are valid only for local scales. In this study, earth observation satellite sensors are used in conjunction with Surface Energy Balance Algorithm for Land (SEBAL) model to overcome difficulties in obtaining evapotranspiration measurements on a regional scale. The estimation of pixel-scaled ET was conducted via SEBAL using Landsat-8 images and meteorological data. Compared with the recorded pan evaporation