watershed forest water quality Debit puncak Remote sensing SIG carbon stock erosi field measurement koefisien aliran permukaan land use luas DAS metode Rational model rasional - ANN Bengawan Solo Brantas river basin Curah hujan DAS mikro Gajah Mungkur Hutan rakyat Hydrology Jenis Tanaman KPL Karakteristik Kolaborasi Kondisi Lahan Pergeseran musim Potensi Kayu Prediction Sumberdaya air Water Quality Wonogiri degradasi lahan degradation degraded discharge dominant parameters forests and land rehabilitation kekeringan konservasi tanah land land degradation partisipasi perencanaan perencanaan penggunaan lahan performance permanent vegetation planning