Trend analysis of rainfall of Sagar district, Madhya Pradesh

Abstract

This paper aims to analyze the trends in historical rainfall of Sagar district using parametric and non-parametric approaches. The analysis is carried out using 45 years data (1960-2004) of four rain gauge stations located in different Tehsils namely Sagar, Khurai, Rehli and Banda. Mann-Kendall analysis, Sen's slope method and Linear regression method are used for the trend analysis. The analysis is segregated into four parts, winter, monsoon, summer and annual rainfall. The results show that the Khurai station has significant rising trend in rainfall during the summer season while the Rehli station has significant falling trend during the summer season. The trend detected by Mann-Kendall analysis and Sen's method is also reflected in the linear regression approach. The magnitude of Sen's slope and regression analysis have also been presented and discussed.