Impact of Land Use Change Study on Reservoir’s Sediment Yield using SWAT Model Platform

Girma Kebebew Tufa,Bogale G Mariam,

doi:10.35940/ijeat.e9877.1010120

Abstract

The overall goal of this study is to evaluate the effect of land use on reservoir’s sediment yield by applying Arc SWAT model interface with GIS and identify the vulnerable sub basin in Neshi dam watershed. Different input data were collected from different sources including Ministry of Water, Irrigation and Energy, and Ethiopia National Meteorological Agency. The study was done using historical records of nineteen years for Neshi Watershed. The calibrated flow and sediment for the 1992-2001 years gave R2 0.77, 0.92 and NES 0.64, 0.96, respectively. The validated flow and sediment for the 2002-2008 years gave R2 0.72, 0.93 and NES 0.75, 0.95, respectively.In this study the SWAT model yields average annual sediment load of 634.49, 516.82 and 542.56 ton/ha/yr for land use change of 1990, 2010 and 2017, respectively at Neshi outlet dam site. Therefore, the issue of land use change impact on sediment yield on reservoir as part of the integrated adaptation mitigation measures program in order to achieve sustainable development is very relevant. The output of this study can help planners, decision makers and other stakeholders to plan and implement appropriate soil and water conservation strategies.

Highlights

Assessment and analysis of soil erosion, sediment yield and their intake and deposition in reservoir is essential
(Taye, H. 2016) has considered dynamics of Land Use and Cover Changes (LUCC) with SWAT model that are related to land use change in the sub basin on stream flow, he has not considered about sedimentation effect under land use/cover changes for Amerti-Neshi reservoir A
Objective of the Study The overall objective of this study is to evaluate the impact of land use changes on Neshi reservoir’s sediment yield, by using Arc SWAT model

Summary

Introduction

Assessment and analysis of soil erosion, sediment yield and their intake and deposition in reservoir is essential. 2016) has considered dynamics of Land Use and Cover Changes (LUCC) with SWAT model that are related to land use change in the sub basin on stream flow, he has not considered about sedimentation effect under land use/cover changes for Amerti-Neshi reservoir A. Statement of the problem The absence of Land use planning in Fincha Amerti-Neshi watershed may have resulted in erosion problems due to population density and changing forests into agricultural land. B. Scope of the Study The scope of this study is to determine reservoir sediment yield at the U/stream and watershed of the reservoir to recommend appropriate mitigation measure for storage loss of Neshi reservoir.

Objectives

Methods

Results

Conclusion