Author(s): Angga Widyo Pramono; Didik Ardianto; Fahmi Hidayat; Raymond Valiant Ruritan; Djoko Legono
Linked Author(s): Djoko Legono, Fahmi Hidayat
Keywords: Reservoir sedimentation; Catchment management; Reservoir management; Reservoir sustainability
Abstract: The development of reservoirs in Indonesia, particularly in Java, was influenced by the needs of more sustained water resources for agriculture and non-agriculture (such as hydro power plant, domestic, industry and other water municipal) purposes. However, due to the rapid of growth of population and increase of housing and agriculture needs in Java Island, the change of land use in most part of the island is inevitable and become the main sources of sediment yield accumulation in the reservoirs. This paper studied the reservoir sedimentation that occurs at several dams in Central Java (Wonogiri, Kedungombo, Sempor, Wadaslintang and Sudirman dams). The decrease of the reservoir effective storage has been found significantly in all reservoirs, where Wonogiri Reservoir at the most severe sedimentation, followed by Sudirman, Kedungombo, Sempor and Wadaslintang Reservoirs. The decrease of the dead storage was also identified and contributes some disruption for the dam performance. Some countermeasures due to reservoir sedimentation such as construction of sediment control structure is discussed in this paper. Several issues on the environmental deterioration at the downstream of Sudirman Dam are also discussed based on the specific study that involving the community and related institutions. The current status of the reservoir sedimentation on the above five reservoirs is formulated, the possible reasons and the future anticipation to sustained the reservoir’s life are discussed in this study.
Year: 2018