DefinePK

Abstract

The climate change propagates the magnitude and variability of rainfall received at local areas. Statistical analysis of rainfall measurements usually uses to observe the influence of this global phenomena on specifics location. This research aims to analyze the annual rainfall trend in East Java. The daily rainfall data from 237 locations used as the input for this study. The spatial and temporal variability of annual and monthly rainfall performed by Histogram visualization of rainfall data amongst sub-region. Three statistical methods (i.e., Median-Crossing, Mann-Kendall, and Rank-Sum Test) use for the analysis. Annual rainfall data range from 1980 to 2015 evaluated using those three statistical tests. The spatial variability of annual rainfall trends in specific regions visualised using the histogram. The result shows that a few locations have a positive trend of annual rainfall over the two decades. While other sites indicate no significant trend, this study also produces thematic maps showing the value of trends in each location.