Rainfall-runoff modelling of Ajay river catchment using SWAT model

7th International Conference on Environment and Industrial Innovation

生态环境科学;工业技术

Kangsabanik, Subhadip^1 ; Murmu, Sneha^1

Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah

711103, India^1

关键词: Coefficient of correlation;    Digital elevation model;    Distributed-parameter model;    Hydrological response unit;    Maximum and minimum temperatures;    Rainfall;    Runoff modelling;    Soil and water assessment tool;    Soil and Water assessment tools;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/67/1/012033/pdf
DOI  :  10.1088/1755-1315/67/1/012033

来源: IOP

【 摘 要 】

The present study is based on SWAT (Soil and Water Assessment Tool) Model which integrates the GIS information with attribute database to estimate the runoff of Ajay River catchment. Soil and Water Assessment Tool (SWAT) is a physically based distributed parameter model which has been developed to predict runoff, erosion, sediment and nutrient transport from agricultural watersheds under different management practices. The SWAT Model works in conjunction with Arc GIS. In the present study the catchment area has been delineated using the DEM (Digital Elevation Model) and then divided into 19 sub-basins. For preparation of landuse map the IRS-P6 LISS-III image has been used and the soil map is extracted from HWSD (Harmonized World Soil Database) Raster world soil map. The sub basins are further divided into 223 HRUs which stands for Hydrological Response Unit. Then by using 30 years of daily rainfall data and daily maximum and minimum temperature data SWAT simulation is done for daily, monthly and yearly basis to find out Runoff for corresponding Rainfall. The coefficient of correlation (r) for rainfall in a period and the corresponding runoff is found to be 0.9419.