Advances in Life Sciences 5(2), Print : ISSN 2278-3849, 553-564, 2016 Spatial Analysis of Rainfall Variation in Dharmapuri District Tamilnadu using GIS K. BALATHANDAYUTHAM1, D.TAMILMANI2 AND C. MAYILSWAMI3 1Department of Agronomy, PAJANCOA & RI, Karaikal 2Department of Soil and Water Conservation Engineering, AEC & RI, Kumulur 3Water technology Centre, TNAU, Coimbatore, Tamilnadu, India email:
[email protected] ABSTRACT scanty in different parts. It also has great regional and temporal variations in distribution. The study Among the climatic elements the rainfall is the first of rainfall distribution pattern and its temporal index, ever thought of by farmers and climatic analyzers as it is the most important single factor variations is very important, as the country’s which determines the cropping pattern of an area in economy is highly dependent on agriculture. general and the type of crop to be cultivated and its Therefore, the study has been conducted in order success or failure in particular. It is therefore to help policymakers and developers to make more necessary to study the spatial and temporal variation informed decisions, especially, the results will help of rainfall for judging the agricultural production farmers to take necessary steps for cultivation potential and sustainability of agricultural process. production system. However, rainfall has one the Recent studies Balathandayutham et al., 2014 highest spatial-temporal variability especially in has analysed rainfall variation analysis of mountain region where in addition, there is scarcity Parambikulam Aliyar Palar (PAP) basin, Tamil of information. Planning suitable measures for Nadu, India. He has interpreted monthly, seasonal mitigating the problems requires through knowledge of the rainfall pattern.