BibTeX:

@article{IJIRSTV1I8033,
     title={Rainfall Trends and Pattern of Sweta Nadhi Basin, Salem District, Tamil Nadu, India Using GIS},
     author={S. Priyadharshini and Dr. S. Aruchamy},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={8},
     pages={98--107},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I8033.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

The study of rainfall pattern is very important for the agricultural planning of any region. Rainfall being the predominant form of precipitation causing stream flow, especially the flood flow in a majority of rivers in India. In the present study, an attempt has been made to assessment the rainfall variation and monitoring with respect to spatial distribution in sweta basin. In this work were exiguities by GIS Technique. To achieve the aim of rainfall variations during winter (Jan. & Feb.), summer (Mar. to May), southwest monsoon (Jun. to Sep.) and northeast monsoon (Oct. to Dec.) were analyzed for the period from 1980 to 2010. The study is based on 30 years of the monthly rainfall data for 16 rain gauge stations. While analyzing the long term average of monthly and annual rainfall, the annual rainfall of the region is 746.77mm, of which the winter, summer, southwest and northeast monsoon records 10.39, 111.65, 274.88and 349.85mm respectively. The results suggest that the model reproduces the number and spatial distribution maps of rainfall extremes with some accuracy, but that mean rainfall and rainfall variability is estimated over dry regions of Sweta basin, Swetha nadhi is the minor basin of Vellar major basin, South India.

Rainfall, Spatial Distribution, Annual and Seasonal Rainfall, Rainfall Variability, Precipitation Ratio And Sweta Nadhi Basin.