Sandeep Kumar Patakamuri|Krishnaveni Muthiah|Venkataramana Sridhar
Long-Term Homogeneity, Trend, and Change-Point Analysis of Rainfall in the Arid District of Ananthapuramu, Andhra Pradesh State, India
Anna University, Chennai|Anna University, Chennai|Virginia Tech
objective study evaluate homogeneity trend trend change points rainfall data daily rainfall data collected arid district ananthapuramu andhra pradesh state india 1981 2016 subdistrict level aggregated monthly annual seasonal rainfall totals number rainy days quality checks homogeneity analysis total 27 rain gauge locations considered trend analysis serial correlation test applied time series identify serially independent series nonparametric mannkendall test spearmans rank correlation tests applied serially independent series magnitude trend calculated using sens slope method data influenced serial correlation various modified versions mannkendall tests prewhitening trendfree prewhitening biascorrected prewhitening two variants variance correction approaches applied significant increasing summer rainfall trend observed six 27 stations significant decreasing trends observed two stations southwest monsoon season two stations northeast monsoon season identify trend change points time series distributionfree cumulative sum test sequential mannkendall tests applied two opensource library packages developed r language namely modifiedmk trendchange implement statistical tests mentioned paper study results benefit water resource management drought mitigation socioeconomic development sustainable agricultural planning region