Your search found 3 records
1 Somatilake, H. S.. 2002. Water for energy. In Imbulana, K. A. U. S.; Droogers, P.; Makin, I. W. (Eds.), World Water Assessment Programme Sri Lanka case study, Ruhuna basins: Proceedings of a Workshop held at Koggala Beach Hotel, Sri Lanka, 7-9 April 2002. Colombo, Sri Lanka: IWMI. pp.129-141.
Electricity supplies ; Hydroelectric schemes ; Energy ; Institutions ; Public sector ; Private sector ; Production costs ; Discharges / Sri Lanka / Uma Oya / Ruhuna Basin / Uda Walawe / Samanalawewa
(Location: IWMI-HQ Call no: IWMI 333.91 G744 IMB Record No: H031116)
2 Molle, François; Jayakody, Priyantha; Ariyaratne, B. Ranjith; Somatilake, H. S.. 2005. Balancing irrigation and hydropower: case study from southern Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI). vi, 38p. (IWMI Research Report 094) [doi: https://doi.org/10.3910/2009.024]
Reservoirs ; Dams ; Hydroelectric schemes ; Economic analysis ; Canals ; Irrigation scheduling ; Cropping systems ; Case studies / Sri Lanka / Samanalawewa Reservoir / Kaltota Irrigation Scheme / Walawe River Basin / Puranagama Village / Ratnapura
(Location: IWMI-HQ Call no: IWMI 631.7.1 G744 MOL Record No: H037591)
(1.83MB)
This report analyzes a case from southern Sri Lanka, where the Samanalawewa dam and the Kaltota Irrigation Scheme (KIS) compete for the water of the Walawe river. At the catchment level, it is shown that dam releases are well attuned to the needs of KIS and to the occurrences of natural runoff, and that little of the dam water is "lost" to the river.
3 Molle, Francois; Jayakody, Priyantha; Ariyaratne, B. Ranjith; Somatilake, H. S.. 2008. Irrigation versus hydropower: sectoral conflicts in southern Sri Lanka. Water Policy, 10(Suppl.1):37-50. [doi: https://doi.org/10.2166/wp.2008.051]
Water power ; Conflict ; Hydroelectric Schemes ; Irrigation water ; River basins ; Dams ; Reservoirs ; Irrigation scheduling ; Water rights ; Economic evaluation / Sri Lanka / Walawe River Basin / Samanalawewa Reservoir
(Location: IWMI HQ Call no: IWMI 631.7 G744 MOL, PER Record No: H040818)
Although hydropower does not directly consume water, its generation frequently conflicts with other uses, notably irrigation, because its release schedule does not always correspond to the timing of water use by other activities. This article analyses a case from the Walawe river basin, Sri Lanka, where economic efficiency can be raised by reducing releases from the dam for irrigation for the benefit of hydropower generation. The tradeoff is analysed in financial and managerial terms and different options for reducing irrigation diversions are reviewed. Although the high level of current diversions for irrigation warrants the possibility of improvement in management, it is shown that finding ways to reduce supply faces technical and socio-political constraints that make the realization of economic benefits costly and difficult.
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