ANALISIS DEBIT PUNCAK PADA DAS AIR MANNA BAGIAN HILIR MENGGUNAKAN PENDEKATAN METODE HIDROGRAF SATUAN SINTETIS (HSS) SNYDER DAN HEC-RAS 5.0.7

Authors

  • Khairul Amri Universitas Bengkulu
  • M. Hafidz Ramadhan Universitas Bengkulu
  • Muhammad Fauzi Universitas Bengkulu

DOI:

https://doi.org/10.51988/jtsc.v2i2.32

Keywords:

Rainfall, Peak Discharge, HEC-RAS 5.0.7, Synthetic Unit Hydrograph, Snyder Return Period

Abstract

Floods is a disaster which is one of the causes of failure of watershed managemen. High rainfall is also a factor in flooding. As a result the river cross section is not able to accommodate the flow of water and cause the river to overflow. This research was conducted to determine the amount of peak discharge Sub-DAS Air Manna Bagian Hilir and identify areas prone to flooding. This study uses a synthetic unit hydrograph (HSS) Snyder and HEC-RAS 5.0.7. Hydrological analysis results obtained from the peak discharge at Sub-DAS Rindu Hati using HSS Snyder for a return period of 2, 5, 10, 25, 50 and 100 yearsthat is 743,627 m3/sec, 839,491 m3/sec, 897,761 m3/sec, 962,599 m3/sec, 1008,717 m3/sec, and 1052,800 m3/sec with a peak time of 5,915 hours. After analysis using software HEC-RAS 5.0.7, DAS Air Manna no longer able to accommodate flow rates occur.

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Published

2021-07-31

Issue

Vol. 2 No. 2 (2021): July

Section

Articles

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