Supit, Cindy Jeane and Mangangka, Isri R. and ., Sukarno and Supit, Audy
(2014)
WATER RESOURCES MANAGEMENT BY MODELING OF DAM
OPERATION.
In: The International Conference on Environmentally Friendly Civil Engineering Construction and Materials (EFCECM 2014), Manado - Indonesia, 13-14 November, Manado.
Abstract
The Arc-Geographic Information System interface of the SWAT2009 version was used to
develop the SWAT model of Kase River Catchment. SWAT has a reservoir module, in which the
reservoir is treated as an independent unit to be added in the corresponding sub basin.
Therefore, it is appropriate for simulating the influence of the hydrological cycle in a region
with reservoirs, such as our study basin.
The catchment was divided into 23 sub-basins according to hydrologic stations, the position
of dams, the water diversion point, and the discharge zones. The sub-basin threshold area
was 500 ha. Kanjimbashi was selected as the outlet of the whole basin. The hydrologic
response unit (HRU), which is a unique combination of soil and land use overlay in the sub- basins ,
is the minimum calculative smallest unit of hydrologic process. With a threshold value of 5% for
land use and soil types, the total number of HRUs was 356.
By scenario analysis for controlled the minimum outflow rate from Hokuzan dam and Kase
River dam, the water resources quantity improved and satisfied the demand water of 5 m3/s for
preventing eutrophication at the creek network downstream area and also 18.6 m3/s for
agriculture purpose after the implementation of water management operation of dams.
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