The Influence of Land Use and Slope Variation to Soil Infiltration Rate on Semarang City, Indonesia

From 2018 to 2022, there have been 3 floods in Gunungpati District. One factor that influences flood in this area is the infiltration rate. Many factors influence infiltration rates, two of them being land use and slope. This study aimed to determine the distribution of land use and slope gradient in Gunungpati District using GIS-based spatial analysis. The results show that land use in the research area is divided into 5 classes: primary and secondary dry land forests; plantations; shrubs and grasslands; dryland farming; and settlements, paddy fields, bodies of water, and open land. Land use is dominated by settlements, paddy fields, bodies of water, and open land (33.7% of the total area). The slopes in the study area are divided into 5 classes: flat (<8%), gentle (8—15%), wavy (15—25%), steep (25—40%), and very steep (>40%). The wavy class dominates the slopes (29.3% of the total area). Based on these results, a moderate infiltration rate dominates the infiltration rate in the study area.