The Impact of Dam Reservoir on Flood Reduction (Case Study Logung Reservoir, Kudus, Central Java)

Qonaah Rizqi Fajriani, Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Yogyakarta, 55281, Indonesia
Khoirunnisa Ulya Nur Utari, Pemali Juana River Basin Organization, Ministry of Public Works and Housing, 50246, Indonesia
Ria Nurulita, Directorate of Irrigation and Lowlands, Ministry of Public Works and Housing, 12110, Indonesia


The Indonesian government targeted building 65 reservoirs and dams in 2015-2022. The purpose is to maintain food security facing the long-term climate crisis, besides reducing the impact of a flood. Logung  Reservoir is located on the Logung River, Kudus, Central Java. This earth-fill dam was built to solve the flood and drought problems in Kudus. However, the existence of the Logung Reservoir gives a risk to the downsteam area. The purpose of this research is to study flood reduction and the risk of overtopping, which can cause a dam break, and to calculate the Logung Reservoir spillway's performance in handling floods. This study is based on four main steps: the rainfal-runoff modelling, the extreme rainfall estimation, the hydrograph inflow of the dam estimation, and the evaluation of food reduction. The results of the 1000-year rainfall analysis and PMP for the Logung dam basin were 409 mm and 704 mm, respectively. Rainfall distribution is made using ABM, and effective rainfall is calculated by the SCS method. Land use analysis in the Logung dam watershed obtained a CN-II of 71.4 and a CN-III of 85.2. The rainfall-runoff transformation method used a unit hydrograph. The Nakayasu and Gama-I unit hydrographs show significant differences from the peak discharge, although not for the time base. The flood hydrograph design affects the reservoir performance. The reservoir flood routing results a dumping efficiency of 35% for the 1000-year and 21% for PMF. The 1000-year flood routing shows that there was no risk of overtopping. The highest water level on the PMF flood routing at +94.1. Several solutions can prevent overtopping by reducing inflow discharge through small dams upstream, increasing the green area, or modifying spillway structure.


hydrologic routing; dumping efficiency; reservoir

Full Text:



J. Boulange, N. Hanasaki, D. Yamazaki, and Y. Pokhrel, “Role of dams in reducing global flood exposure under climate change,” Nature Communications 2021 12:1, vol. 12, no. 1, pp. 1–7, Jan. 2021, doi: 10.1038/s41467-020-20704-0.

I. Khaddor, M. Achab, M. R. Soumali, A. Benjbara, and A. H. Alaoui, “The impact of the construction of a dam on flood management,” Civil Engineering Journal (Iran), vol. 7, no. 2, 2021, doi: 10.28991/cej-2021-03091658.

R. Vanijjirattikhan, C. Thongthamchart, P. Rakcheep, U. Supakchukul, and J. Suwatthikul, “Reservoir flood routing simulation for dam safety management in Thailand,” Journal of Disaster Research, vol. 16, no. 4, 2021, doi: 10.20965/JDR.2021.P0596.

I. A. ’ ’Firman, “Tipe Bendungan di Indonesia : Identifikasi dari 130 proyek yang selesai sampai tahun 2010,” in Seminar Nasional Bendungan KNIBB, 2016.

S. Sosrodarsono, Takeda, and Kensaku, “Bendungan Type Urugan,” Pradnya Paramita, 1977.

Direktorat Jenderal Sumber Daya Air, Pedoman Kriteria Umum Desain Bendungan. Jakarta: Direktorat Jenderal Sumber Daya Air, 2003.

P. Choudhury, R. K. Shrivastava, and S. M. Narulkar, “Flood Routing in River Networks Using Equivalent Muskingum Inflow,” J Hydrol Eng, vol. 7, no. 6, pp. 413–419, Nov. 2002, doi: 10.1061/(ASCE)1084-0699(2002)7:6(413).

BBWS Pemali Juana, “Sertifikasi Desain Pembangunan Bendungan Logung, Kabupaten Kudus, Jawa Tengah,” Jakarta, 2015.

Bambang Triatmodjo, Hidrologi Terapan . Yogyakarta: Beta Offset, 2008.

World Meteorogical Organization, Manual on Estimation of Probable Maximum Flood. Switzerland: WMO, 2009.

Joko Sujono, “Design Unit Hydrograph Theory,” in Yogyakarta: Eleventh Congres of The Asia and Pacific Division of the International Association of Hydraulic Research, 1998.

Sri Harto B, Analisis Hidrologi. Yogyakarta: Nafiri Offset, 2000.

Sri Harto B, Hidrologi: Teori, Masalah, Penyelesaian. Nafiri Offset, 2000.

V. te Chow, “Handbook of applied hydrology,” International Association of Scientific Hydrology. Bulletin, vol. 10, no. 1, 1965, doi: 10.1080/02626666509493376.



  • There are currently no refbacks.

Copyright (c) 2022 Qonaah Rizqi Fajriani

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Publisher:                   Co-Publisher:

Indexed by:

Supported by:
Jurnal Ilmiah Magister Managemen

Social Media:

 Online (e-ISSN): 2528-388X  || Printed (p-ISSN): 0216-762X

Lisensi Creative Commons
INERSIA by was distributed under a Creative Commons Attribution 4.0 International License.