EVALUASI LAHAN UNTUK MENILAI KINERJA SUB DAERAH ALIRAN SUNGAI RAWAKAWUK (Land evaluation to assess performance of Rawakawuk Sub Watershed)

Land is an important resource in a watershed because of its position as a processor. The condition of a watershed depends on the land management and its compliance with its performance. The purpose of the research is to evaluate the performance of Rawakawuk Sub Watershed from the land aspects. Guidelines of Watershed Evaluation and Monitoring, i.e. the Regulation of Director General of Land Rehabilitation and Social Forestry or PerDirjen 04/V-Set/2009 was used to analyze parameters of Vegetation Cover Index (VCI), Land Use Suitability Index (LUSI), and Erosion Index (EI). The results showed that the study area  has 53% of pine and teak monoculture, and 20,7 % of agroforestry private forest, therefore the VCI is 73,2%. The LUSI is 93,7% which implies that 93,7% of the area is suitable to its land capability. In addition, 36,1% of the area is exposed to very severe erosion. Since the solum depth is relatively deep (>90 cm), the tolerable soil erosion is high and EI tends to be small. Around 60,3% of the area has an average EI of 71,1 which is classified as moderate. Based on the cumulative value of VCI, LUSI and EI, Rawakawuk Sub Watershed can be classified as slightly good. However, conservation practices should be applied to the very severe erosion areas.