Abstract
Precipitation is an essential component of the hydrological cycle, and its variability is the principal determinant of irrigation practices and other water developmental works. In the present study, gridded rainfall values of 0.5° × 0.5° resolution spanning 115 years (1901–2015) were taken for the recently formed Telangana state in India for analysis of annual and seasonal variability. The average annual precipitation varied between 691.64 mm and 1141.01 mm. The north and northeastern regions of Telangana were the most fed regions during the monsoon season, contributing 79% of the annual rainfall. Further, the departure analysis of rainfall revealed 14 excess years, 77 normal years, 22 deficient years, and 2 scanty years for the state. Mann–Kendall test and Sen’s slope test revealed an overall significant positive trend in most grid points, and the slope of the trend was lower in the northern regions for the annual rainfall series. Monsoon (89%) and post-monsoon series (59%) depicted a significantly positive trend. From the homogeneity analysis, the most probable change point year was found to be 1952. An increase of 11% and 10% in the annual and monsoon rainfall, respectively, was found after the shift for the entire region.KeywordsTelanganaMann–Kendall testSen’s slope testPrecipitationDeparture analysisRainfall trend
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