Simulation of Runoff and Sediment Yield for a Kaneri Watershed Using SWAT Model

Vidula A Swami,Sushama S Kulkarni

doi:10.4236/gep.2016.41001

Abstract

Watershed as an entry point acts as a beginning to address the issues of sustainable rainwater management for improving livelihoods. Extraction of watershed parameters using Geographical Information System (GIS) and use of simulation models is the current trend for hydrologic evaluation of watersheds. In the present study, the open Source Tool Quantum GIS 2.2.0 was used for preparation of maps to verify the spatial extent of the area. The Soil and Water Assessment Tool (SWAT) having an interface with Arc-View GIS software (ArcGIS 10.1 with Arc SWAT 2012 extension) was selected for the estimation of runoff and sediment yield from Kaneri watershed, located in Western Maharashtra region. The coefficient of determination (R2) for the monthly and yearly runoff was obtained as 0.849 and 0.951 respectively for the calibration period 1979 to 2000 and 0.801 and 0.950 respectively for the validation period 2001-2013. The R2 value in estimating the monthly and yearly sediment yield during calibration period was computed as 0.722 and 0.788 respectively. The R2 for monthly and yearly sediment yield values for validation period was observed to be 0.565 and 0.684 respectively.

Highlights

Watershed as an entry point acts as a beginning to address the issues of sustainable rainwater management for improving livelihoods
( ) S= Wt SWo + ∑ Pday − Qsurt − AET − Qseep − Qgw where SWt is the final water content in millimeters, SWo is the initial soil water content on day i, Pday is precipitation on day i, Qsurf is surface runoff on day i, AET is the actual evapo-transpiration on day i, Qseep is the water flowing into the unsaturated zone form the soil profile on day i and Qgw is the return flow from the shallow aquifer and lateral flow on day i and t is time in days [3]
Soil and Water Assessment Tool (SWAT) model is used for prediction of runoff and sediment yield in the micro watershed Kaneri

Summary

Introduction

(2016) Simulation of Runoff and Sediment Yield for a Kaneri Watershed Using SWAT Model. Kulkarni can scientifically formulate strategies for water and soil conservation To achieve this goal, the choice and use of an appropriate watershed model is a must as stated by Sathian and Shyamala [1]. For assessing the impact of land management practices and climate on water flow and sediment yield in ungauged Kaneri watershed, Swami and Kulkarni [5] use SWAT (Soil and Water Assessment Tool) model in the study. Study Area Kaneri village is located in south Maharashtra region and is dominated by undulating plateau. It is located south-east to Kolhapur city on Pune-Bangalore highway in Maharashtra state. Permissible soil loss given by Mannering (1981), is from 4.5 to 11.2 tonnes/ha/year

Methods

Results

Conclusion