PENGEMBANGAN MODEL ANSWERS UNTUK PERHITUNGAN EROSI DAN SEDIMENTASI PADA SUB-DAS SECANG DAN SUB-DAS KEDUANG
| Main Authors: | , rahmawati, , Dr. M. Pramono Hadi, M.Sc |
|---|---|
| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/100081/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=56306 |
Daftar Isi:
- model ANSWERS (Areal Nonpoint Source Watershed Environment Response Simulation) is a ofdistributed hydrological which have the ability to predict the spatial erosion and sedimentation in certain or specific watershed. The objective of this study were: 1) To evaluate the performance of the ANSWERS model to predict erosion and sedimentation 2) To deploy and evaluate the ANSWERS model to predict erosion and sediment.tion done Development of a model made by rewriting the source code in FORTRAN 90 ANSWERS. The model has been developed further in trials using secondary data at Sub-Watershed Secang and Sub-watershed keduang. The analysis usedin this research are the sensitivity analysis, the spatial analysis and temporal analysis. Validation and verification by calculating the actual erosion based on outcrop plant roots. The study results the demonstration of the ANSWERS v.1.01 in Subwatershed Secang provide information of erosion value generated by 8 tonnes / ha and the sedimentation of 1.3 ton / ha, while for Sub-watershed Keduang, erosion value obtained by 5 tons / ha and sedimentation of 3.3 tons / ha. The developed ANSWERS curently has ability to process more than 100,000 pixels compared to the previous version which only 1000 pixels. The results could also simulate the development of 12 rain stations while the previous version only capable to stimulate 3 stations. Simulation in two areas of research using the developed ANSWERS indicate the total erosion obtained in Sub-watershed Secang is 9.1 tons / ha while in Sub-watershed Keduang is 62.9 tons / ha. Results validation showed the difference between average and actual erosion model using the developed ANSWERS is about 163.87 t / ha / yr, while using the ANSWERS v.1.01 difference obtained by an average of 311.6 tonnes / ha / yr.