Climate change impacts on the Palu watershed’s precipitation characteristics

Abstract

Abstract Climate change occurs naturally and due to accelerated elements due to human activities, which result in deviations from the average climate trend (increasing or decreasing). This study was conducted to identify the effects of climate change on the precipitation characteristics in the Palu watershed (DAS). The climate change analysis method used is Mann-Kendall-Sens. The analysis of the nature of rain uses the standard deviation, which shifts the wet month from the wet month to the dry month using the Oldeman method. This study uses secondary data, namely rainfall data from 1985–2020, from five rainfall stations. The results of this study indicate climate change in the Palu watershed, which is characterised by a negative Z value (decreasing) in January and a positive Z value (increasing) in June. The results of the analysis of the nature of rain in January for the 1985-1995 period were normal (N), the 1996-2006 period was below normal (BN) and the 2007-2020 period was below normal (BN). In June, the 1985–1995 period was below normal (BN), the 1996–2006 period was normal (N), and the 2007–2020 period was normal (N).