Mrica Reservoir Sedimentation: Current Situation and Future Necessary Management

https://doi.org/10.22146/jcef.26640

Puji Utomo(1*)

(1) Technology Institute of Yogyakarta, Indonesia
(*) Corresponding Author

Abstract


Mrica Reservoir is one of many reservoirs located in Central Java that experienced a considerably high sedimentation during the last ten years. This condition has caused a rapid decrease in reservoir capacity. Various countermeasures have been introduced to reduce the rate of the reservoir sedimentation through catchment management and reservoir operation by means of flushing and/or dredging. However, the sedimentation remains intensive so that the fulfillment of water demand for electrical power generation was seriously affected. This paper presents the results of evaluation on the dynamics of the purpose of this research is to evaluate the sediment balance of the Mrica Reservoir based on two different scenarios, i.e. the existing condition and another certain type of reservoir management. The study on sediment balance was carried out by estimating the sediment inflow applying sheet erosion method in combination with the analysis of sediment rating curve. The measurement of the deposited sediment rate in the reservoir was conducted through the periodic echo sounding, whereas identification of the number of sediment that has been released from the reservoir was carried out through the observation on both flushing and dredging activities. The results show that during the last decade, the rate of the sediment inflow was approximately 5.869 MCM/year, whereas the released sediment from the reservoir was 4.097 MCM/year. In order to maintain the reservoir capacity, therefore, at least 1.772 MCM/year should be released from the reservoir by means of either flushing or dredging. Sedimentation management may prolong the reservoir’s service life to exceed the design life. Without sediment management, the lifetime of the reservoir would have finished by 2016, whereas with the proper management the lifetime may be extended to 2025.


Keywords


Sedimentation, sediment balance, remaining life, sedimentation management

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References

CV. Widha, 1988. Erosion and Sedimentation Research in Serayu Watershed, Mrica Hydraulic Power Plant, Banjanegara: CV Widha.

Department of Forestry, 2009. P. 32/MenhutII/2009 Tata Cara Penyusunan Rencana Teknik Rehabilitasi Hutan dan Lahan Daerah Aliran Sungai [Guideline for Forest and Watershed Rehabilitation Planning (RTkRHL-DAS)], Jakarta: Ministry of Forestry.

Fauzi, B. A., 2006. Management of Sedimentation in Panglima Besar Reservoir, Yogyakarta: Civil Engineering Department Universitas Gadjah Mada.

Graf, W. H. & Altinakar, M. S., 1998. Fluvial Hydraulics. Chichester, England: John Wiley & Sons, Ltd.

Indonesian Power Company, 2015. Laporan Pelaksanaan Penyelidikan Sedimentasi Waduk [Report of Investigation of Reservoir Sedimentation], Banjarnegara: Indonesian Power Company.

Jasa Tirta I Public Corporation, 2015. Roadmap of How to Manage Sedimentation in Mrica, Wadaslintang and Sempor Reservoir in Bogowonto Watershed. Malang, Indonesian Water Corporation.

Krisetyana, H., 2008. Tingkat Efisiensi Penggelontoran Endapan Sedimen di Waduk PLTA PB Soedirman, Semarang: Civil Engineering Department Universitas Diponegoro.

Malik, D. J., 2006. Prediction Remaining Life of Mrican Reservoir in Banjarnegara Central Java with Dead Storage Capacity Method and Empirical Area Reduction, Purwokerto: Civil Engineering Department Universitas Jendral Soedirman.

Meyer, P. E. & Muller, R., 1948. Formula for Bed Load Transport. Stockholm, Proceedings 3rd Meeting of IAHR.

Nugraha, A. A., 2015. Study on the Performance of Wonogiri Reservoir as Flood Control Structure. Journal of the Civil Engineering Forum, 1(3), pp. 85-92. doi: 10.22146/jcef.24007

Setiawan, C., 2011. Kajian Pengendalian Sedimentasi di Waduk PB. Soedirman dengan Bangunan Pengendali Sedimen dan Pengaturan Tata Guna Lahan [Study on Sedimentation Management at PB. Soedirman Dam and Land Use Control], Yogyakarta: Civil Engineering Department Universitas Gadjah Mada.

Utomo, P., 2017. Kajian Imbangan Sedimen dan Sisa Umur Layanan di Waduk Mrica, Banjarnegara, Jawa Tengah [Investigation of Sediment Balance and Design Life of Mrica Reservoir], Yogyakarta: Master Thesis. Faculty of Engineering, Universitas Gadjah Mada.

Wulandari, D. A., Legono, D. & Darsono, S., 2015. Evaluation of Deposition Pattern of Wonogiri Reservoir Sedimentation. International Journal on Civil and Environmental Engineerung - International Journal of Engineering and Sciences. Paper ID:153202-7474-IJCEE-IJENS

 



DOI: https://doi.org/10.22146/jcef.26640

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