The Nubian Sandstone Aquifer System (NSAS) is made up of three major sub-basins: Kufra, Dakhla, and the N. Sudan Platform. It one world’s largest groundwater systems. aquifer’s hydrologic setting, connectivity its sub-basins, flow across these sub-basins are currently unclear. To address issues, we used a combined approach that included: (1) regionally calibrated model mimics early (>10,000 ...

a flow-duration curve (fdc) illustrates the relationship between the frequency and magnitude of streamflow. applications of fdc are of interest for many hydrological problems related to hydropower generation, river and reservoir sedimentation, water quality assessment, water-use assessment, water allocation and habitat suitability. this study was carried out in 11 selected watersheds with commo...

Soil conservation and control of erosion is a basic problem in all countries. The goal of this research is to estimate erosion and sediment yield in Ekbatan Dam drainage basin by Erosion Potential Method (EPM), using Geographic Information System (GIS). The basin is located in Hamedan Province, west of Iran, in a cold and semi- arid region, with an average annual rainfall of 334mm. The study ar...

Abstract Erosion and sedimentation are the most complicated problems in hydrodynamic which are very important in water-related projects of arid and semi-arid basins. For this reason, the presence of suitable methods for good estimation of suspended sediment load of rivers is very valuable. Solving hydrodynamic equations related to these phenomenons and access to a mathematical-conceptual mode...

in the case of iran with arid and semiarid climate and lack of freshwater, pay attention to water quality and its effective factors is necessary. karkheh watershed is more than 5 million hectares in area and with biggest soil dam in asia, which has widespread land use changes in last decades. the most important factors of water volume and water resources reduction are aridity and improper land ...

This study evaluated the performance of early, late and final runs IMERG version 06 precipitation products at various spatial temporal scales in China from 2008 to 2017, against observations 696 rain gauges. The results suggest that three can well reproduce patterns precipitation, but exhibit a gradual decrease accuracy southeast northwest China. Overall, show better performances eastern humid ...

Understanding how drought is impacted by both natural and human influences crucial to the sustainable utilization protection of water resources. We established a severity index (DSI) based on terrestrial storage anomaly (TWSA) derived from GRACE satellite detect characteristics trends over ten major river basins in China 2002 2017. The influence factors (terrestrial components, precipitation, e...