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Paper Details

Paper Title
Estimation of Surface Runoff Using GIS-Based NRCS-CN Method in Upper Manimuktha Subwatershed,Tamilnadu,India
Spatial and temporal runoff measurements are required for planning, developing and managing a watershed sustainably. Among the methods for estimating runoff from rainfall, the SCS (NRCS)-CN method is most used practical method due to its requirement of single parameter estimation called Curve Number (CN). In the present study, the runoff from the upper Manimuktha sub-watershed (4C1A2e), an ungauged watershed in Villupuram district of Tamilnadu, India, has been assessed. IRS 1C LISS-3 satellite images (1995, 2003 and 2012) were used to obtain land use/land cover information. Hydrologic Soil Groups (HSG) map was prepared from the soil map of the study area. After integrating land use/land cover and hydrologic soil layers, weighted curve numbers were obtained and mapped by using ArcGIS 10.5 software. The daily rainfall data were collected from Gomukhi dam and Manimuktha dam raingauge stations for 25 years (1992-2017) and converted to weighted spatial distributed rainfall by Thiessen polygon method and used to calculate the daily, monthly and annual runoff. The average annual minimum and maximum rainfall were 548.23mm (in 2016-2017) and 2151.61 mm (in 2005-2006) and the corresponding runoff were 64.28mm (in 2016-2017) and 1134.02 mm (in 2005-2006). This study will be useful to estimate runoff from an ungauged watershed having same characteristics.
Watershed, SCS(NRCS)-CN method, HSG,AMC and Land use/cover
Others Details
Paper Id : 58437
Author Name : Velayudha Das M
Co-Author Name(s) : Poongothai S
Volume/Issue No : Volume 05 Issue 03
Page No : 68-79
DOI Number : DOI:10.21090/IJAERD.58437
Publication Date : 2018-03-07
License : This work is licensed under a Creative Commons Attribution 4.0 International License.
website :
Impact Factor : 4.72, SJIF-2016
ISSN Details : eISSN: 2348-4470, pISSN:2348-6406