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Intensity-Duration-Frequency (IDF) Curve and the Most Suitable Method to Determine Flood Peak Discharge in Upper Werba Sub-Watershed

Kusumastuti, Cilcia and Sudjarwo, Prasetio and CHRISTHIE, MARVIN and KRISNA, TIMOTIUS (2019) Intensity-Duration-Frequency (IDF) Curve and the Most Suitable Method to Determine Flood Peak Discharge in Upper Werba Sub-Watershed. Civil Engineering Dimension, Vol 21 (No 2 (). pp. 70-75. ISSN 1979-570X

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      Abstract

      Design flood is one of the important factors for flood risk assessment and water infrastructures planning and development in a certain location. There are several methods to estimate it, one method which has been commonly and widely use is using flood frequency analysis. This research aims to develop Intensity-Duration-Frequency (IDF) curves in Upper Werba Sub-Watershed, West Papua Province, Indonesia, to estimate design rainfall intensity. The design rainfall intensity is used to estimate peak of flood discharge using Rational Formula in the sub-watershed. Other methods, i.e. Soil Conservation Service (SCS) and Nakayasu Synthetic Unit Hydrograph are also presented in this paper to provide comparison of the estimated peak of flood discharge. The result shows that the Rational method provide the closest magnitude of estimated flood discharge in Upper Werba Sub-Watershed to the observed streamflow. Therefore, it is suggested that the Rational method can be used for water infrastructure planning and development in the sub-watershed.

      Item Type: Article
      Uncontrolled Keywords: IDF curve, Rational method, streamflow, Synthetic Unit Hydrograph, watershed
      Subjects: T Technology > TA Engineering (General). Civil engineering (General)
      Divisions: Faculty of Civil Engineering and Planning > Civil Engineering Department
      Depositing User: Admin
      Date Deposited: 29 Oct 2019 18:34
      Last Modified: 10 Jan 2020 21:30
      URI: http://repository.petra.ac.id/id/eprint/18529

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