Climatic changes over Krishna district in present and future climate Scenarios

IJEP 43(4): 356-367 : Vol. 43 Issue. 4 (April 2023)

Sunny Agarwal1 and G.C. Satyanarayana2*

1. Koneru Lakshmaiah Education Foundation, Department of Civil Engineering, Guntur, Andhra Pradesh – 522 502, India
2. Koneru Lakshmaiah Education Foundation, Centre for Atmospheric Science, Guntur, Andhra Pradesh – 522 502, India


In the present study, statistical analysis of rainfall data was done for different mandals of Krishna district, Andhra Pradesh to understand the spatio-temporal variability over the region. Daily observed rainfall events (1989-2018) and future downscaled climate scenarios (2019-2048) RCP 4.5 and 8.5 were considered to calculate mean, standard deviation, coefficient of variation and slope on an annual and seasonal basis. The number of mean rainy days and their trend was calculated for annual and southwest monsoon. Rainfall anomalies were computed to identify excess and deficit rainfall years and the highest maximum daily rainfall for the study area. Also, rainfall composite anomaly was calculated for annual rainfall to understand spatial and temporal variability of rainfall using spatial interpolation technique (inverse distance weight). It was observed that the upper portion of the district shows a higher amount of excess rainfall as compared to the lower portion for annual rainfall and southwest monsoon. For the north-western and southeastern portions of the district, minimum deficit rainfall was observed for southwest monsoon as compared to annual rainfall.


Spatial, Temporal, Anomalies, Rainfall, Statistical


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