Your search found 7 records
1 Anputhas, Markandu; Ariyaratne, B. Ranjith; Gamage, Nilantha; Jayakody, Priyantha; Jinapala, Kiribandage; Somaratne, Pallewatte G.; Weligamage, Parakrama; Weragala, Neelanga; Wijerathna, Deeptha. 2005. Bringing Hambantota back to normal: a post-tsunami livelihoods needs assessment of Hambantota District in southern Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI). ix, 59p.
Natural disasters ; Research methods ; Mapping ; Villages ; Income generation ; Statistics ; Irrigated farming ; Livestock ; Fisheries ; Economic aspects ; Rehabilitation / Sri Lanka / Hambantota
(Location: IWMI-HQ Call no: IWMI 363.348068 G744 ANP Record No: H036747)
(2.74 MB)
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 Ariyaratne, B. Ranjith. 2005. NARBO workshop participants’ study tour to the upper part of Maha Oya on 27th of April 2005 – Problems in the upper part of the basin. In Network of Asian River Basin Organisations. Second NARBO Training Workshop on River Basin Management and Organisations for Mid-Career Professionals in South Asian countries held at The Beach Hotel, Negombo, Sri Lanka, 24-29 April 2005. Manila, Philippines: Network of Asian River Basin Organizations (NARBO). 6p.
(Location: IWMI-HQ Call no: e-copy only Record No: H037724)
(0.55 MB)
4 Saleth, Rathinasamy Maria; Dinar, A.; Neubert, S.; Kamaiah, B.; Manoharan, S.; Abayawardana, Sarath; Ariyaratne, B. Ranjith; de Silva, S. 2007. Institutions, impact synergies and food security: a methodology with results from the Kala Oya Basin, Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI). 46p. (IWMI Research Report 124) [doi: https://doi.org/10.3910/2009.123]
Institutional development ; Development plans ; Development policy ; Impact assessment ; River basins ; Food security ; Models / Sri Lanka / Kala Oya Basin
(Location: IWMI HQ Call no: IWMI 338.1 G744 SAL Record No: H040802)
(677 KB)
The success of development programs depends on the role of underlying institutions and the impact synergies from closely related programs. Existing literature has limitations in accounting for these critical factors. This paper fills this gap by developing a methodology, which can quantify both the institutional roles in impact generation and the impact synergies from related programs. The methodology is applied to the Kala Oya Basin in Sri Lanka for evaluating the impacts of three development programs and 11 institutions on food security. The results provide valuable insights on the relative roles of institutions and the varying flow of impact synergies both within and across impact pathways.
5 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.
6 Panabokke, Chris R.; Ariyaratne, B. Ranjith; Seneviratne, A.; Wijekoon, D.; Molle, Francois. 2007. Characterization and monitoring of the regolith aquifer within four selected cascades (sub-watersheds) of the Malala Oya Basin [Sri Lanka]. Colombo, Sri Lanka: International Water Management Institute (IWMI). 38p. (IWMI Working Paper 122) [doi: https://doi.org/10.3910/2009.307]
Aquifers ; Groundwater recharge ; Groundwater depletion ; Water table ; Monitoring ; Watersheds ; Wells ; Electrical conductivity ; Water quality ; Fluorides ; Heliothis ; Pumping ; River basins ; Canals / Sri Lanka / Malala Oya Basin / Mau Ara trans-basin canal
(Location: IWMI HQ Call no: IWMI 333.9104 G744 PAN Record No: H040887)
(441KB)
The groundwater present in the hard rock region of the dry zone of Sri Lanka is made up of the shallow 'Regolith Aquifer' and the deeper fracture zone aquifer is now clearly recognized. However, up to now no study had been carried out or reported in this country on the dynamic nature of this shallow regolith aquifer. This is the very first study carried out and reported in this regard. As part of the study, the impact of the Mau Ara trans-basin canal on the groundwater conditions below the area of influence of this trans-basin feeder canal has also been examined.
7 Jinapala, K.; Ariyaratne, B. Ranjith. 2009. Partnerships in action: establishing movable and vertical vegetable gardens for internally displaced persons in the north. Water Matters: news of IWMI research in Sri Lanka, 4:7.
Vegetable growing ; Cropping systems ; Agricultural extension ; Food security / Sri Lanka / Vavuniya
(Location: IWMI HQ Call no: IWMI 630 G744 IWM Record No: H042496)
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