Within the broad water catchment area, land use is mainly governed by the counties and the Foresty Bureau, but flood / landslide control work is divided among central government agencies, including the Water Resources Agency (WRA) (the reservoir area), the Forestry Bureau (state-owned forest land), the Soil and Water Conservation Bureau (SWCB) (slopeland), and the Ministry of Transportation and Communications (roadways).
綿延起伏的廣袤集水區中，土地使用的管理機關主要是縣政府和林務局（林班地）；整治單位則分屬中央各部會：水庫蓄水範圍由經濟部水利署負責，國有林班地由農委會林務局主管，二者以外的山坡地則由農委會水土保持局負責，至於道路水土保持，又另由道路主管機關（交通部）辦理。