Your search found 2 records
1 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.
2 Imbulana, N.; Manoharan, S.. 2020. Hydrological and water balance studies to evaluate options for climate resilience in smallholder irrigation systems in Sri Lanka. Water Policy, 22(6):1024-1046. [doi: https://doi.org/10.2166/wp.2020.111]
Smallholders ; Irrigation systems ; Hydrology ; Water balance ; Tanks ; Irrigation water ; Water supply ; Water demand ; Agricultural sector ; Water requirements ; Water storage ; Climate change ; Resilience ; Forecasting ; Adaptation ; Strategies ; Groundwater ; Rainfall-runoff relationships ; Food security ; Land use ; Population growth ; Models / Sri Lanka / Anuradhapura / Ranorawa Cascade / Thalawa Sub-Basin
(Location: IWMI HQ Call no: e-copy only Record No: H050149)
(0.72 MB)
Smallholder agriculture shares a great portion of Sri Lanka's economy and provides a livelihood to 20% of the country's labour force. However, smallholder agricultural systems are considered highly vulnerable to climate variability and change. As such, improving their climate resilience is critical to ensuring sustainable development of the country. In the country's dry zone, agricultural systems are supported by thousands of small and large irrigation tanks in cascades, whose water supply potential keeps fluctuating widely between years and seasons due to rainfall variability which is a unique characteristic of this zone. In this study, we assessed the hydrological potential of the catchments of these tanks in a typical irrigation system and provided a framework to design an optimal strategy to enhance climate resilience of such systems for improved agricultural production, using a water balance model. The results show that climate-induced impacts on hydrology coupled with population growth and agricultural expansion increase irrigation water demands in the near future. Moreover, demand-side interventions will be more effective than supply-side adaptation in reducing the demand-supply gap. The study recommends evaluating more adaptation measures under expert guidance, uncertainty assessments of future climate and socio-economic pathways, and incorporating a cost-benefit assessment in the model.
Powered by DB/Text WebPublisher, from
