ANALISIS AGIHAN HUJAN BERDASARKAN DATA HIDROGRAF

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2006
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/29343/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=12406
• Institution: Universitas Gadjah Mada

The rainfall pattern is generally analyzed based on automatic rainfall recorder data. Ilowever, those data are usually unavailable, in the other hand there are automatic water level recorder data (flood hydrograph) at the certain locations of a river basin. Using the hydrograph data, the inverse hydrology could be applied to derive its rainfall pattern. This research uses 52 flood events collected Qt Cimam(k river bqsin in West Java that includes 5 sub-river basins. The filter separation autoregressive method is selected to separate the hyd.rograph to its components i.e. baseflow and direct runoff components. The resulted direct runoff is then used for deriving the effective rainfall using inversely estimated rainfall (IER) method. The resulled IER is further analyzed to obtain its pattern. The resulted patterns together with other rainfall patterns are appliecj to compute design floods by using unit hydrograph method. The statistical criteria are applied to measure the design flood accuracy by comparing the results with the flood frequency analysis. The results sholl that the fER pattern is relatively similar with the observed rainfall pattern. Those patterns gilve more accurate design flood hydrograph than other rainfall patterns tested