Effect climate change on the potential erosion of the Singkoyo watershed

Abstract

Global climate change results in an increase/decrease in rainfall, resulting in frequent occurrence of extreme rains that cause floods and landslides as well as prolonged droughts.. This study aims to determine the effect of climate change on the erosion potential of the Singkoyo watershed. The data used in the form of rain data obtained from Singkoyo Station (2008-2020), geological maps, maps of the earth’s appearance and land use maps. The method used in analyzing the erosion potential is USLE. The climate change scenario is carried out by multiplying the average monthly rainfall by -20%, -10%, 10% and 20%. The result of this research is the reduction of rain by 10% and 20% resulted in decreased erosion potential by 3.7 tons/ha/year (13.3%) and 7.3 tons/ha/year (26.2%). An increase in rainfall of 10% and 20% resulted in the potential for erosion to increase by 3.9 tons/ha/year (13.9%) and 7.9 tons/ha/year (28.1%). The conclusion of this study is that the relationship between rainfall and erosion potential is linear, meaning that an increase in rainfall causes an increase in erosion potential and vice versa.