Identification of the Spatial Distribution of Water Infiltration Areas Condition Using Geographic Information Systems in the Segeri Watershed

Abstract

Abstract Water infiltration areas are places where rainwater seeps into the soil and becomes groundwater through infiltration. Poor water absorption can cause an increase in the volume of surface water flow; therefore, it is necessary to identify water catchment areas that play an important role in maintaining the environment and stability of the water cycle using a Geographic Information System model. The Segeri Watershed is located in Pangkajene and Kepulauan Regency and Barru Regency, where land conversion occurs frequently, causing frequent flooding. This study aimed to identify the condition of the water catchment area in the Segeri Watershed and analyze the factors that most influence the condition of the water catchment area in the Segeri Watershed. This study used the overlay method to assess potential infiltration parameters and actual infiltration based on the Procedures for Compiling Forest and Watershed Land Rehabilitation Engineering Plans (RTkRHL-DAS,2009). Data were collected through spatial data processing, soil sampling, and land cover ground checks. The results of the study showed that the water infiltration area in th Segeri Watershed has four conditions: of the total area of the Segeri Watershed, which is 18,933.62 ha, approximately 44.25% has good conditions. The primary factor influencing the condition of the water absorption area in the Segeri Watershed is land cover; specifically, areas dominated by good conditions exhibit greater actual infiltration, particularly in regions covered by secondary dryland forest, which constitutes 20.24% of the total water catchment area

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