Kebutuhan luas hutan mininum untuk pengendalian tata air dan degradasi lahan sesuai morfogenesis dan karakteristik bentang lahan daerah aliran sungai
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2008
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/27422/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=10481 |
Daftar Isi:
- Flood, landslide, drought hazards and increasing of critical land become great threats for Indonesia. Those were believed caused by forest degradation and decreasing of forested area in watershed. The problem is a watershed has landscape's characters that varied and complex. Thus, how large is minimum forest land required to control water balance, soil erosion, and land degradation? This research aimed to review minimum forest land required to control water balance, soil erosion, and land degradation in a watershed. The research was done in 21 subwatersheds in Upper Solo watershed. Calculation of minimum forest land was done by calculating total area of state forest and community forest resulted from optimization of land use. Optimization of land use was done by quantitative modeling using linear programming by applying Quantitative Systems for Business Plus (QSB+) program. Results of the study showed that minimum requirement of forest land area of each watershed was unequal and varied much, depended on landscape's morphogenesis, soil erodibility, slope, and composition of actual land use. Comparatively, minimum forest land area required based on watershed landscape's morphogenesis were HDenudasional > HVolcanic> HKarst> HStructural> HFluvial. Minimum forest land for sub-watershed dominated by denudational landscape range from 25,71 to 70,56% with average 42,89%