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Putu Aryastana
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Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa
Published by Universitas Warmadewa
ISSN : 23032693     EISSN : 25812939     DOI : https://doi.org/10.22225/pd.6.2.482.108-122
Core Subject : Social, Engineering,
Civil Engineering, Building, Construction & Architecture Environmental Science
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa, 2303-2693 (Print ISSN), 2581-2939 (Electronic ISSN) is a journal of civil engineering provides a forum for publishing research articles or review articles which published by Warmadewa University Press jointly with Progam Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa. This journal is also dedicated to provide an intellectual space of scholarly discussion how journal of civil engineering able to create the new global formation of civil engineering and similar issues. This journal has been distributed by Progam Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa started from Volume 1 Number 1 Year 2012 for Print and Oline from Volume 3 Number 1 Year 2014 to present. This journal encompasses original research articles, review articles, and short communications, including: Civil Engineering; Water Resources; Construction Management; Transportation; Structure; Geotechnics; Environment; Others Engineering
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 1 Documents
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Search results for , issue "195-203" : 1 Documents clear
Analisis dan simulasi debit banjir dengan variasi koefisien limpasan menggunakan HEC-RAS Ade Tricia Miranda
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa 195-203
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

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Abstract

Floods have a damaging impact on at-risk areas such as areas with relatively high land cover, especially after heavy rains. Land cover is the influence of land use. In land use, the runoff coefficient (C) is a factor that greatly affects the amount of water runoff that occurs during and after rain. The runoff coefficient (C) describes how large the proportion of rainwater that will flow as surface runoff compared to the water that seeps into the soil, so, the closer the coefficient value is closer to the value of 1, the more an area is unable to absorb water, as well as if the runoff coefficient (C) is closer to 0, the more an area can absorb water well. The runoff coefficient (C) has a high correlation with land use. In this study, the variation of runoff coefficient (C) will be simulated on rainfall and area using rational equations and then the results are simulated using HEC-RAS. The variation in runoff coefficient (C) was simulated with the criteria conditions of cultivated land, clay & silt loam soils (C= 0.4) and regional conditions when only able to overflow water or unable to absorb (C= 1). The results were found that the runoff coefficient (C) affects the area and depth of flooding in the study area. At C = 0.4 the maximum flood depth is 2.99 meters in the upstream part of the river and 1.65 meters downstream, while when C = 1, the maximum flood depth is 2.03 meters in the upstream part and 1.1 meters in the downstream part. In this case, it is important to prepare rainwater reservoirs in areas with relatively high land cover or runoff coefficient (C).

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