Rainfall Precipitation Pattern from 2001-2021 over Andhra Pradesh Region in India

Abstract

The research focuses on a key meteorological variable, precipitation, in order to analyze the changing trend of rainfall in Andhra Pradesh, India. The State highly depends on rainfall for its agricultural activities, but the occurrence of rainfall is unprecedent and variable, causing adverse implications on the cropping system as well as negative effects on natural water resources. Daily data from the years 2001 to 2021 were analyzed to determine monthly, seasonal and yearly rainfall variability using statistical methods such as mean, standard deviation (SD) and coefficient variability (CV). District wise monthly, seasonal and annual rainfall trends have been drawn using 21-year daily data. The statistical analysis of whole reference time series data reveals that maximum mean South West Monsoon (SWM) rainfall is received in the north and central coastal districts of Srikakulam, Visakhapatnam, Vizianagaram, East Godavari, West Godavari and Krishna. North East Monsoon (NEM) rainfall contributes significantly in mean annual rainfall of southern coastal district and Rayalaseema sub division of the State.