STUDY FLOOD HYDROGRAPH IN THE TANJUNG PARAK WATERSHED ON THE CONSTRUCTION OF PULAU TIGA RESERVOIR

Study Flood Hydrograph In The Tanjung Parak Watershed On The Construction Of Pulau Tiga Reservoir

  • Mashuri Program Studi Teknik Sipil, Jurusan Infrastruktur dan Kewilayahan, Institut Teknologi Sumatera
  • Miskar Maini Program Studi Teknik Sipil, Jurusan Infrastruktur dan Kewilayahan, Institut Teknologi Sumatera
  • Aulia Hidayat Burhamidar Jurusan Teknik Pertambangan, Fakulltas Teknik, Universitas Negeri Padang
DOI: https://doi.org/10.35814/infrastruktur.v8i1.3186
Abstract views: 93 | pdf downloads: 120
Keywords: Hydrograph, ITB-1, Nakayasu, Pulau Tiga Reservoir, SCS

Abstract

The Purpose of construction the reservoir to control flood and rainwater reservoir . In Rainy Season, Pulau Tiga Village always flood due to overflow of the Tanjung Parak river and at dry season, people have difficulty getting raw water. For this reason, it is necessary to build reservoir as an effort to control flooding and water absorption especially in rainy season and as rainwater reservoir to demand raw water people.The reservoir planning requires the study of the flood hydrograph in the Tanjung Parak Watershed using the synthetic unit hydrograph method. The SCS, Nakayasu, and ITB-1 method were used in flood hydrograph analysis. The performance of all HSS modeling are very good and qualified based on volume control value/ direct runoff (dro) is close to 1 where the HSS SCS method is 0,99891 with volume 749,18 m3, the nakayasu HSS method is 1,07161 with volume 803,71 m3 and the HSS ITB-1 method is 1,00821 with volume 756,16 m3. The peak discharge for the 25-year return period due to hyetograph 6 hours with the SCS Method 12.70 m3/ s with volume 39447,80 m3, the Nakayasu Method 13,14 m3/ s with volume 43758,16 m3 and the ITB-1 Method 12,76 m3/ s with 39658,17 m3. The value of HSS SCS method is considered to represent flood hydrograph in Tanjung Parak river because volume/ dro value is closer to 1 than HSS ITB-1 and HSS Nakayasu methods so peak discharge and hydrograph volume will be basic for calculations in planning reservoir dimensions and other.

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Published
2022-04-29
How to Cite
Mashuri, Maini, M., & Burhamidar, A. H. (2022). STUDY FLOOD HYDROGRAPH IN THE TANJUNG PARAK WATERSHED ON THE CONSTRUCTION OF PULAU TIGA RESERVOIR. Jurnal Infrastruktur , 8(1), 25 - 32. https://doi.org/10.35814/infrastruktur.v8i1.3186