National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A watershed is commonly defined as an area in which all water drains to a common point. From a hydrological perspective, a watershed is a useful unit of operation and analysis because it facilitates a systems approach to land and water use in interconnected upstream and downstream areas. Watershed projects aim to maximize the quantity of water available for crops, livestock and human consumption through on-site soil and moisture conservation, infiltration into aquifers, and safe runoff into surface ponds. Remote sensing (RS) and Geographic Information System (GIS) can be effectively used to manage spatial and non-spatial database that represent the hydrologic characteristics of the watershed. Hence, the present study temporal variability of runoff was conducted by using annual, monthly and seasonal rainfall – runoff analysis of 35 years of period (1980-2014) rainfall data of study watershed by using methods like Soil Conservation Service – Curve Number (SCS-CN) and Arc GIS 9.3 tool. Mutukula watershed receives rainfall in almost all the months, the rainfall data of 1980 to 2014 reveals that the watershed received good rain during June to November with a mean monthly rainfall of 51.6, 98.9, 100.4, 87.7, 115.3, 61.9 mm in June, July, August, September, October, November respectively. Watershed generates good runoff during June to November with a total mean monthly runoff of 0.1 mm during January and 1.3 mm rainfall during December. Watershed receives rainfall in all the three season, during Kharif season receives the highest average rainfall amount 402.3 mm, compare to other two seasons, in Rabi season 93.6 mm and Zaid season 104.3 mm. Seasonal runoff in Kharif season the highest amount of average runoff with 21.2 mm throughout the watershed, and fallowed by Rabi with 8.0 mm, Zaid with 4.1 mm.
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