The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia

Understanding the rainfall-runoff response on a watershed requires the study of both the observed and synthetic unit hydrographs. The application of a synthetic unit hydrograph for an ungauged watershed is the prospective alternative. Model development to obtain the unit hydrograph without rainfall...

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Main Authors: Harset, Demetrio, Jayadi, Rachmad, Legono, Djoko
Format: Article PeerReviewed
Language:English
Published: King Mongkut's Institute of Technology Ladkrabang 2022
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Online Access:https://repository.ugm.ac.id/282044/1/Harset%20et%20al%20-%202022%20-%20The%20Influence%20of%20Two%20Different%20Time%20of%20Concentration.pdf
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spelling id-ugm-repo.2820442023-12-01T06:22:50Z https://repository.ugm.ac.id/282044/ The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia Harset, Demetrio Jayadi, Rachmad Legono, Djoko Civil Engineering not elsewhere classified Understanding the rainfall-runoff response on a watershed requires the study of both the observed and synthetic unit hydrographs. The application of a synthetic unit hydrograph for an ungauged watershed is the prospective alternative. Model development to obtain the unit hydrograph without rainfall and runoff data requires information on the physical characteristics of the watershed and its geomorphological parameters. This paper presents the results of a study on the application of the Geomorphological Instantaneous Unit Hydrograph (GIUH) model in which the time of concentration equations of Kirpich and Ventura were used as a comparison. The study objects are the Keduang and Temon Sub-watersheds of the Upper Bengawan Solo River, Indonesia. The study utilized the sub-watershed characteristic data obtained from the satellite data of ASTER Global DEM V3, which was then processed with the Watershed Modeling System and ArcMap. The results show that in the Keduang Sub-watershed, the Ventura equation gave results closer to the observed unit hydrograph than the Kirpich equation. In the Keduang Sub-watershed, the differences between the two times of concentration on the triangular parameters were significant, i.e. 77.13, 337.57, and 338.20 for peak discharge, peak time, and base time, respectively. On the other hand, in Temon Sub-watershed, the differences were 33.88, 28.63, and 25.09 for peak discharge, peak time, and base time, respectively. In terms of the GIUH-based flood hydrograph estimation, the results show that the utilization of the Ventura equation generally led to better estimates (closer to the observed flood hydrograph) than that of Kirpich equation. © 2022, King Mongkut's Institute of Technology Ladkrabang. All rights reserved. King Mongkut's Institute of Technology Ladkrabang 2022 Article PeerReviewed application/pdf en https://repository.ugm.ac.id/282044/1/Harset%20et%20al%20-%202022%20-%20The%20Influence%20of%20Two%20Different%20Time%20of%20Concentration.pdf Harset, Demetrio and Jayadi, Rachmad and Legono, Djoko (2022) The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia. Current Applied Science and Technology, 22 (5). pp. 1-14. ISSN 2586-9396 https://li01.tci-thaijo.org/index.php/cast/article/view/253279/173086
institution Universitas Gadjah Mada
building UGM Library
continent Asia
country Indonesia
Indonesia
content_provider UGM Library
collection Repository Civitas UGM
language English
topic Civil Engineering not elsewhere classified
spellingShingle Civil Engineering not elsewhere classified
Harset, Demetrio
Jayadi, Rachmad
Legono, Djoko
The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
description Understanding the rainfall-runoff response on a watershed requires the study of both the observed and synthetic unit hydrographs. The application of a synthetic unit hydrograph for an ungauged watershed is the prospective alternative. Model development to obtain the unit hydrograph without rainfall and runoff data requires information on the physical characteristics of the watershed and its geomorphological parameters. This paper presents the results of a study on the application of the Geomorphological Instantaneous Unit Hydrograph (GIUH) model in which the time of concentration equations of Kirpich and Ventura were used as a comparison. The study objects are the Keduang and Temon Sub-watersheds of the Upper Bengawan Solo River, Indonesia. The study utilized the sub-watershed characteristic data obtained from the satellite data of ASTER Global DEM V3, which was then processed with the Watershed Modeling System and ArcMap. The results show that in the Keduang Sub-watershed, the Ventura equation gave results closer to the observed unit hydrograph than the Kirpich equation. In the Keduang Sub-watershed, the differences between the two times of concentration on the triangular parameters were significant, i.e. 77.13, 337.57, and 338.20 for peak discharge, peak time, and base time, respectively. On the other hand, in Temon Sub-watershed, the differences were 33.88, 28.63, and 25.09 for peak discharge, peak time, and base time, respectively. In terms of the GIUH-based flood hydrograph estimation, the results show that the utilization of the Ventura equation generally led to better estimates (closer to the observed flood hydrograph) than that of Kirpich equation. © 2022, King Mongkut's Institute of Technology Ladkrabang. All rights reserved.
format Article
PeerReviewed
author Harset, Demetrio
Jayadi, Rachmad
Legono, Djoko
author_facet Harset, Demetrio
Jayadi, Rachmad
Legono, Djoko
author_sort Harset, Demetrio
title The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
title_short The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
title_full The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
title_fullStr The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
title_full_unstemmed The Influence of Two Different Time of Concentration Equations on the GIUH-based Flood Hydrograph Estimates of Keduang and Temon Sub-Watersheds, Indonesia
title_sort influence of two different time of concentration equations on the giuh-based flood hydrograph estimates of keduang and temon sub-watersheds, indonesia
publisher King Mongkut's Institute of Technology Ladkrabang
publishDate 2022
url https://repository.ugm.ac.id/282044/1/Harset%20et%20al%20-%202022%20-%20The%20Influence%20of%20Two%20Different%20Time%20of%20Concentration.pdf
https://repository.ugm.ac.id/282044/
https://li01.tci-thaijo.org/index.php/cast/article/view/253279/173086
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