Spatio Temporal Analysis of Rainfall Variation, Precipitation Ratio, and Rainfall Anomaly Index (RAI) in and around Neyveli Lignite Mine Area, Tamil Nadu

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Lalithambigai G., Vasudevan S., Sathyamoorthy G., Selvaganapathi G., Umasankar U.


The Meteorological Parameters like Rainfall in and around the Neyveli lignite mine area are Subject to wide variability in time and space.This variability has assumed a more Pronunced dimension due to climate changes. The Rainfall Variation is Characteristics changes critical for agriculture, the environment, and Water Resources.  The present study aims to understand the spatial distribution of rainfall and its influences in the Rainfall Variation and Precipitation Ratioon time scale of 12 months at eleven stations andthe Rainfall Anomaly Index (RAI). For evaluation,the rainfall data of 11 rain gauge stations from 2000-2019 were collected fromNeyveli Lignite Corporation India Limited (NLCIL).Map of spatial variations of Annual and Seasonal Rainfall Mean Rainfall, Precipitation Ratio,Rainfall Variability,Rainfall Anomaly Index(RAI) in the interpolation of datasets was performed by the inverse distance weighted IDW,Thiessen polygon function inbuilt within from produced ARCGIS10.1 software.

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