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Analisa Debit Banjir Rancangan DAS Cisangkuy
Analysis Of Flood Design Of Cisangkuy Watershed
Journal from JBPTPPOLBAN / 2022-02-17 07:59:31Oleh : Enung - 198201162010122001 (enung@polban.ac.id)
Dibuat : 2022-02-08, dengan 1 file
Keyword : Banjir, DAS Cisangkuy, Hidrograf Satuan Sintetis Nakayasu, Snyder-Alexejev
Penurunan mutu Daerah Aliran Sungai (DAS) Cisangkuy mengakibatkan semakin seringnya kejadian banjir di beberapa wilayah di DAS Cisangkuy. Dengan adanya perubahan tataguna lahan di DAS Cisangkuy, mengakibatkan berubahnya karakteristik dari Das itu sendiri, oleh karena itu perlu dilakukan analisa debit banjir rancangan di DAS Cisangkuy sebagai masukan untuk perencanaan pengendalian banjir di DAS Cisangkuy. Analisa debit banjir rancangan merupakan bagian dalam analisis hidrologi, untuk menghitung debit banjir rencana digunakan metode Hidrograf Satuan Sintetis (HSS) Nakayasu dan Snyder-Alexejev. Debit banjir rancangan dihitung untuk berbagai periode ulang, yaitu banjir periode ulang 2 tahun (Q2th), banjir periode ulang 5 tahun (Q5th), banjir periode ulang 10 tahun (Q10th), banjir periode ulang 25 tahun (Q25th), banjir periode ulang 50 tahun (Q50th), banjir periode ulang 100 tahun (Q100th). Hasil dari perhitungan debit banjir rancangan untuk berbagai periode ulang yaitu: Q2th sebesar 271,43 m3/s; Q5th sebesar 335,31 m3/s; Q10th sebesar 369,86 m3/s; Q25th sebesar 407,27 m3/s; Q50TH sebesar 431,59 m3/s; dan Q100th sebesar 453,39 m3/s;
Deskripsi Alternatif :The decline in the quality of the Cisangkuy Watershed (DAS) has resulted in more frequent flooding events in several areas in the Cisangkuy watershed. With changes in land use in the Cisangkuy watershed, resulting in changes in the characteristics of the watershed itself, therefore it is necessary to analyze the design flood discharge in the Cisangkuy watershed as input for flood control planning in the Cisangkuy watershed. Analysis of the design flood discharge is part of the hydrological analysis, to calculate the planned flood discharge the Nakayasu and Snyder-Alexejev Synthetic Unit Hydrograph (HSS) methods are used. Design flood discharge is calculated for various return periods, namely 2 year return period flood (Q2th), 5 year return period flood (Q5th), 10 year return period flood (Q10th), 25 year return period flood (Q25th), 50 year return period flood year (Q50th), 100 year return period flood (Q100th). The results of the calculation of the design flood discharge for various return periods are: Q2th of 271.43 m3/s; Q5th is 335.31 m3/s; Q10th is 369.86 m3/s; Q25th of 407.27 m3/s; Q50TH is 431.59 m3/s; and Q100th of 453.39 m3/s;
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ID Publisher | JBPTPPOLBAN |
Organisasi | |
Nama Kontak | Erlin Arvelina |
Alamat | Jl. Trsn. Gegerkalong Hilir Ds. Ciwaruga |
Kota | Bandung |
Daerah | Jawa Barat |
Negara | Indonesia |
Telepon | 022 201 3789 ext. 168, 169, 239 |
Fax | 022 201 3889 |
E-mail Administrator | erlin.arvelina@polban.ac.id |
E-mail CKO | erlin.arvelina@polban.ac.id |
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