Rainfall Characterization in Different Blocks in Mahasamund District of Chhattisgarh

Abstract

The study on focused on the title of Rainfall characterization in different blocks in Mahasamund district of Chhattisgarh is' important to scientific communities for understanding the characteristics, variability and climate change trends of rainfall over the study area. It also important for identify the maximum and minimum rainfall months and seasons, and seasonal rainfall contribution of the study area. In general, the study was to initiate scientific community for studying impact of rainfall on agriculture, water, health, and etc. over the region. The study utilized 30 years (1992-2021) of daily weather data for five blocks Mahasamund, Bagbahara, Pithora, Basna and Saraipali to analyze trends and anomalies in rainfall. Gridded data were downloaded from NASA POWER dataset. Statistical measuring techniques such as mean, standard deviation, coefficient of variation and linear regression were employed, along with Weather Cock software (15.0). The analysis showed that monthly rainfall July recorded the highest rainfall of 348.4 mm and November was the lowest 3.3 mm rainfall. Saraipali block received the highest annual average rainfall 1315.3 mm and Bagbahara the lowest of 1066.0 mm. The seasonal rainfall analysis shows south west monsoon average 1067.6 ± 71.5 mm CV with 7%, highest in Basna 1150 mm. North east monsoon average 51.0 mm with Saraipali received the highest 70.8 mm. Winter and summer rainfall were low and variable, average 21.0 mm and 32.8 mm, respectively across the district. Trend analysis showed non-significant annual rainfall increase in Bagbahara @6.3 mm/year and Basna @7.5 mm/year while Mahasamund @-1.9 mm/year, Pithora @-6.4 mm/year and Saraipali @-4.4 mm/year showed slight decrease. (SWM) trends followed a similar pattern. Overall, rainfall changes are minimum and do not significantly affect agriculture or livelihoods.