Hydrologie : recherche actuelle

Spatial Distribution Effect of Eco-Hydrological Indicators on Water Resources Flow for the Conservation Planning in Eastern Sudan

Abstract

Solafa Babiker*, Israa Gafar and Elbasri Abulgasim

This study aims to model and combine the eco-hydrological components to evaluate its impact on the potential water flow of selected catchment in eastern Sudan. Spatial variability of landcover types and magnitudes was assessed using landsat and sentinel 2 imageries for years 1996, 2011 and 2018, topographic and soil type factors were used to assess the potentiality for runoff at sub catchment level using CN approach. Rainfall records, CN map and one gauge readings for stream discharge were used to simulate the hydrograph using 10 years return period and assess volumetric flow at sub-catchment level.

Evaluation of the potentiality of the area for high runoff and prediction of water quantity produced by the catchment is crucial for dry lands in Africa generally and in Sudan. Land cover changes show the dominance of agricultural lands and reduction in natural vegetation through the studied periods in addition to soil and topography factors, curve number was generated and reflect high potentiality for generating runoff. Hydrograph analysis was generated and the runoff peak by means of volume and time during the storm event was generated. The studies demonstrate this approach that could be used for promising areas for water management and planning purposes.