The infiltration capacity and rate at the grass, building yard and green open space areas of Universitas Gadjah Mada campus

Land use and soil greatly determine the rate of infiltration. There are three land uses according to vegetation cover and buildings at the Universitas Gadjah Mada (UGM) campus, namely grassland, building yard and green open space area. The purpose of this study is to determine the capacity and rate of infiltration at the UGM campus area and to design the proposed land use that increases infiltration. This research uses a double-ring infiltrometer, soil samples consist of disturbed and undisturbed. Analysis of infiltration capacity using Horton’s formula, then we analysed the physical and chemical properties of the soil at the laboratory. Based on the results of the study, it concludes that the infiltration capacity of grassland is 12.52 mm/hour, the building yard is 10.89 mm/hour, and the green open space area is 14.02 mm/hour. The infiltration rate of the three land uses is slightly slow. The soil texture is mostly silty clay, crumb soil structure and organic matter content ranges from 1-2.1%. The recommended land use plan for the area of UGM is planting more trees.