Analysis of <i>Krueng Keumirue sub-</i>watershed critical land degradation: a preliminary result of <i>Krueng Aceh wa</i>tershed using scoring and overlay approach.

Abstract The Krueng Keumirue sub- watershed is one of the crucial parts of the Krueng Aceh watershed. This watershed supplies the main water for Aceh Besar and Banda Aceh residents. One of the sub-watersheds in the region’s primary water source is Krueng Keumirue sub-watershed. However, the threat of land conditions leading to land degradation is the main problem threatening this watershed. The land in this area needs to be maintained to become a sustainable watershed. In a study of sub-watersheds that represent Krueng Aceh watershed conditions, the Krueng Keumireu Sub-watershed needs to be analyzed for its condition. The potential for land criticality is one of the considerations for studying this sub-watershed. This study used the scoring and overlay method to determine the level of land criticality in the Krueng Keumireu sub-watershed. The scoring and overlay method is a spatial analysis using thematic maps overlay technique related to factors that affect vulnerability assessment of critical land conditions. The scoring is based on weighting based on predetermined parameters. The results of this study show that the level of land criticality in the Krueng Keumireu sub-watershed consists of five classes of critical land conditions. The non-critical land class has a total area of 17,397.36 ha or 57.73% of the entire Krueng Keumireu sub-watershed. The critical potential class has an area of 8,332.16 ha or 27.65%, while the slightly critical class covers 4,007.11 ha or 13.30%. The critical class covers 392.01 ha or 1.30%, and the severe critical class only has an 8.47 ha or 0.03% area.