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Spatial and Temporal Assessment of Rainfall Variability Using GIS Approach in Trichy District of Tamil Nadu

P. Ponnuchakkammal1 , B. Violet Joy2 , P. Aravind2 and A. Raviraj3 *

DOI: http://dx.doi.org/10.12944/CWE.16.3.19

Precipitation is one of the transportation components in hydrological cycle. The magnitude of precipitation swings with time and space. Majorly India receives precipitation in the form of rainfall. Precipitation plays a key role in the rainfed agriculture. The present study deals with the rainfall characteristics of Tiruchirappalli district, Tamil Nadu. Seasonal rainfall data from eighteen rain gauge stations (1971-2012) have been taken for analysis of seasonal and annual rainfall pattern of Tiruchirappalli district. Mean rainfall of the district is about 696 mm. The highest rainfall of 1247 mm recorded in the year 2005 and the lowest precipitation of 227 mm recorded in the year 1976. About 48 percent and 35 percent of the rainfall received in North East and South West Monsoon, respectively.  Spatial rainfall distribution was studied with the help of Kriging interpolation technique and respective maps were prepared with Geographical Information System. The percentage departure of annual rainfall is classified under the category of excess, normal and large excess category. South East and central part of Tiruchirappalli receives moderate to low rainfall. North East parts of Tiruchirappalli district such as pullambadi, Lalgudi and nearby areas received maximum rainfall during North East Monsoon and South West Monsoon. In winter season Manapparai and Vaiyampatti region received more rainfall while in summer season Thottiam and Mayanur area received more rainfall. The two major highlighted crops in Trichy district are Banana and Onion. Tiruchirappalli district is one of the Banana growing belts in Tamil Nadu. Spatial distribution of rainfall maps will be helpful to form a crop plan for different crops to increase the agricultural productivity of Tiruchirappalli district and to ensure the food security.

Annual Distribution; GIS; Kriging; Rainfall Variability; Seasonal Distribution; Tiruchirappalli

Copy the following to cite this article:

Ponnuchakkammal P, Joy B. V, Aravind P, Raviraj A. Spatial and Temporal Assessment of Rainfall Variability Using GIS Approach in Trichy District of Tamil Nadu. Curr World Environ 2021;16(3). DOI:http://dx.doi.org/10.12944/CWE.16.3.19

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Ponnuchakkammal P, Joy B. V, Aravind P, Raviraj A. Spatial and Temporal Assessment of Rainfall Variability Using GIS Approach in Trichy District of Tamil Nadu. Curr World Environ 2021;16(3). Available From: https://bit.ly/31ucedy

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