Calibration and validation of SWAT model using stream flow and sediment load for Mojo watershed, Ethiopia

被引：22

作者：

Biru Z. ^{[1
]}

Kumar D. ^{[2
]}

机构：

[1] Adama Science and Technology University, Oromia Regional State, P.O.Box-1888, Adama

[2] G.B. Pant, University of Agriculture and Technology, U.S. Nagar, Pantnagar, 263145, Uttarakhand

来源：

Sustainable Water Resources Management | 2018年 / 4卷 / 04期

关键词：

Calibration; Distributed watershed model; Efficiency measure; Mojo watershed; Sensitivity analysis; Validation;

D O I：

10.1007/s40899-017-0189-1

中图分类号：

学科分类号：

摘要：

The main aim of this study was to setup and evaluate the applicability of physically based soil and water assessment tool (SWAT) model with ArcGIS version 9.3 in assessing the runoff and sediment load from Mojo watershed having a total area of 2017.21 km2 situated in central Oromia Regional state, Ethiopia. In this study for stream flow simulation parameters involving surface runoff (CN2.mgt) and ground water (ALPHA_BNK.rte) are found the most sensitive parameter and the parameters representing channel process (SPCON.bsn, SPEXP.bsn &ADJ_PKP.bsn), geomorphology (SLSUBBSN.hru) and surface runoff (CN2.mgt, & HRU_SLP.hru), were found more sensitive for sediment load simulation. There are a good agreement between the observed and simulated discharge, which was verified using both graphical technique and quantitative statistics. The value of R2 = 0.75, NSE = 0.76, RSR = 0.49 and PBIAS = 10.9 obtained during calibration and R2 value 0.71, NSE value 0.70, RSR value 0.59 and PBIAS 9.5 obtained during validation as well as the uniformly scatter points along the 1:1 line during calibration and validation justify that the model is good in simulating runoff from Mojo watershed. For sediment load the computed statistical indicators R2 = 0.77, NSE = 0.76, RSR = 0.49 and PBIAS = 48.70 were obtained during calibration and during validation the computed statistical indicators were found 0.67 for R2, 0.65 for NSE, 0.59 for RSR and 50.5 for PBIAS. From the calibration and validation result, it can be concluded that the calibrated parameter values of SWAT model can be used for hydrologic simulation of the un-gauged watershed that is having the similar agro-climatic condition. © 2017, Springer International Publishing AG.

引用

页码：937 / 949

页数：12

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