ESJ58 一般講演（口頭発表） B2-07
*FIRDAUS, RACHMAD,
The existence of Cirasea watershed is important for regional development on upland Citarum watershed, West Java. One of the main problems is the fact that there is a critical land that can disturb the sustainability of conservation and cultivation functions. The existing handling efforts were not successful because its handling efforts were only based on biophysics aspects. The objective of this study is to determine critical land level as an input for priority on handling critical land. There were two main analyses such as analysis of erosivity universal soil loss equation method and analysis of population pressure to the land using population pressure index method and overall analysis using GIS tools. The result shows that most part of area is a high critical land. It is affected by the high level of erosion hazard and population pressure. There is an obvious difference between the determination of critical land based on only biophysics and that synthesizing biophysics and social economic aspects. That variation is shown by the difference of the village numbers and its width area in each category. There are seven typologies that can be inputs for the handling priority. Finally, land use directions are divided into three types: a) conservation area (15 villages), b) limited cultivation area (19) and c) cultivation area (23).