Comparison of Flood Hydrograph of Manikin Dam Watershed Using Synthetic Unit Hydrograph Method, HEC-HMS and Rain on Grid Model with HEC-RAS 2D

Mariano Ado Galot Pukan, Umboro Lasminto

Abstract


Manikin watershed is located in Kuaklalo Village which borders Bokong Village, Taebenu Subdistrict, Kupang Regency, East Nusa Tenggara Province which has an area of 49.31 km2 with a river length of 8.62 km which has a semi-arid climate with a fairly high annual rainfall of around 1000 - 1500 mm. This study aims to compare the design flood discharge and peak hour with Nakayasu Synthetic Unit Hydrograph (HSS) method, GAMA I, HEC-HMS and rainfall discharge model with HEC_RAS 2D in Manikin Dam watershed. In this study, 6-hour rainfall with a return period of 50 years and 100 years was used. Based on the analysis results, the calculation of the hydrological numerical model flood discharge with the HEC-HMS method with a return period of 50 years and 100 years is 511.90 m³/s and 599.30 m³/s with a peak time at the 4th hour. The peak discharge values obtained using the Nakayasu Synthetic Unit Hydrograph and GAMA I methods with a return period of 50 years and 100 years are 342.11 m³/s, 381.14 m³/s and 406.44 m³/s, 456.13 m³/s, and the peak time obtained at SUH Nakayasu is 3 hours and GAMA I is 4 hours. Numerical model results with HEC-RAS 2D v6.6 with 6 hours of rainfall on the grid obtained peak discharge hydrograph values for the 50-year and 100-year return periods of 494.86 m³/s and 604.88 m³/s, with the peak time at the 5th hour. Therefore, the largest peak discharge and peak time results were obtained from the HEC-HMS method among the three SUH formulas and HEC-RAS calculations.


Keywords


manikin watershed; flood hydrograph; synthetic unit hydrograph; Nakayasu; GAMA I; HEC-HMS; HEC-RAS v6.6

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References


D. S. K. &. W. Bunganaen, Koefisien Limpasan Permukaan Untuk Embung Kecil di Nusa Tenggara Timur, Kupang: Lembaga Penelitian Universitas Nusa Cendana Kupang, 2018.

M. E. B. W. B. A. C. D. C. N. B. E. A. Denik S. Krisnayanti, "Analisis Pengisian Awal (Impounding) pada Bendungan Raknamo Dengan Model Tangki," Media Komunikasi Teknik Sipil, vol. 1, no. 26, pp. 61-72, 2020.

L. M. L. R. H. Alvine Cinta Damayanti, "Analisis Debit Banjir Rancangan dengan Metode HSSNakayasu, HSSITB-1, dan HSSLimantara pada DASManikin di Kabupaten Kupang," JTRESDA, vol. II, no. 2, pp. 300-313, 2022.

E. H. R. S. H. Denik S. Krisnayanti, "Perbandingan Debit Banjir Rancangan Dengan Metode HSS Nakayasu, GAMA I dan Limantara Pada DAS Raknamo," Jurnal Teknik Sipil, vol. IX, no. 1, 2020.

P. S. J. C. M. R. a. T. B. Nyein Thandar Ko, "Aquatic Macroinvertebrate Community Changes Downstream of the Hydropower Generating Dams in Myanmar-Potential Negative Impacts From Increased Power Generation," frontiers in Water, vol. II, 2020.

B. B. W. S. N. T. II, "Bendungan Tefmo/Manikin Kabupaten Kupang," Kupang, 2017.

D. A. D. N. M. B. A. Nastasia F. Margini, "Analisa Hidrograf Satuan Sintetik Nakayasu Dan ITB Pada Sub DAS Konto, Jawa Timur," JURNAL TEKNIK HIDROTEKNIK, vol. II, no. 1, pp. 2477-3212, 2017.

A. H. M. F. Tri Setia Budi, "Kesesuaian Model Hidrograf Satuan Sintetik (HSS) Berdasarkan Karakteristik Daerah Aliran Sungai Di Wilayah Sungai Indragiri-Akuaman," Jom FTEKNIK, vol. IV, no. 2, 2017.

K. Subramanya, Engineering Hydrology, Mcgraw Hill Publishing Company Limited, 1984.

D. A. T. S. d. D. S. K. Damayanti Putri Adoe, "Analisis Debit Banjir Pada Das Di Pulau Sumba Dengan Metode HSS Nakayasu Dan HSS GAMA I," Jurnal Teknik Sumber Daya Air, vol. I, no. 1, 2021.

W. H. D. H. T. Dantje K. Natakusumah, "Prosedure Umum Perhitungan Hidrograph Satuan Sintetis (HSS) Dan Contoh Penerapannya Dalam Pengembangan HSS ITB-1 Dan HSS ITB-2," 2012.

Japan Aerospace Exploration Agency, "Global Satelite Mapping of Precepitation (GSMaP)," Japan Aerospace Exploration Agency, [Online]. Available: https://sharaku.eorc.jaxa.jp/GSMaP/. [Accessed 20 11 2024].

Japan Aerospace Exploration Agency, "GSMaP Product Format Version 3.0," Japan Aerospace Exploration Agency, 2021.

European Space Agency, "Copernicus Browser," European Space Agency, [Online]. Available: https://dataspace.copernicus.eu/explore-data/data-collections/sentinel-data/sentinel-2. [Accessed 20 11 2024].

Food and Agriculture Organization (FAO), "Global Hydrologic Soil Groups (HYSOGs250m) for Curve Number-Based Runoff Modeling," ORNL DAAC, [Online]. Available: https://daac.ornl.gov/SOILS/guides/Global_Hydrologic_Soil_Group.html. [Accessed 20 11 2024].

Geospatial Information Agency (BIG) Indonesia, "Product of Geospatial Information Agency (BIG) Indonesia," [Online]. Available: https://tanahair.indonesia.go.id/portal-web/unduh/demnas. [Accessed 20 11 2024].

B. Triatmodjo, Hidrologi Terapan, Depok Sleman Yogyakarta: BetaOffset Yogyakarta, 2006.

M. E. B. J. K. N. a. M. J. M. W. D S Krisnayanti, "The analysis of alpha parameter on Nakayasu Synthetic Unit Hydrograph in Timor Island watersheds," in Materials Science and Engineering, 2019.

US Army Corps of Engineers, Hydrologic Modeling System User's Manual, US Army Corps of Engineers, 2016.

US Army Corps of Engineers, HEC-RAS River Analysis System, Hydraulic Reference Manual Version 6.0. Hydrologic Engineering, US Army Corps of Engineers, 2016.

U. L. a. A. A. G. K. Mohamad Bagus Ansori, " Flood Hydrograph Analysis Using Synthetic Unit Hydrograph, HECc-HMS, And HEC-RAS 2D Unsteady Flow Precipitation On-Grid Model For Disaster Risk Mitigation," International Journal of GEOMATE, vol. 25, no. 107, pp. 50-58, 2023.




DOI: http://dx.doi.org/10.12962/j20861206.v40i1.22124

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