Trend Analysis of Rainfall in Prakasam District of Andhra Pradesh State in India
M. Satya Swarupa Rani *
Department of Agrometeorology, Krishivignan Kendra, Darsi, Prakasam, Andhra-523247, India.
R. Asha
Department Agril. Economics, Acharya N G Ranga Agricultural University, Agricultural College, Bapatla, India.
G. M. V. Prasadarao
Department of Entomology, Krishivignan Kendra, Darsi, Prakasam, Andhra-523247, India.
*Author to whom correspondence should be addressed.
Abstract
Globally, precipitation trend analysis in different space and time has great impact on crop-planning activities. To get accurate unbiased results a long-term climate analysis of a particular area required in large variability in both spatially, temporally. For sustainable crop production long term weather analysis act as vital role in alternation of existing cropping patterns. This study aimed at analysing the trend of rainfall events in Prakasam district of Andhra state of India the data consists of annual precipitation time series from 1991-2019. Initially study concerns with analysis of data base using descriptive statistics, later trend change was detected by using non parametric tests. The results indicate an increased trend in June and monsoon season, with a decreased trend in July and winter season at 5% level of significance.
Keywords: Rainfall, descriptive statistics, non parametric test, trend analysis, Prakasam, Andhra Pradesh.