Your search found 3 records
1 Stanzel, P.; Öze, A.; Smakhtin, V.; Boelee, E.; Droogers, P. 2002. Simulating impacts of irrigation on the hydrology of the Karagan Lagoon in Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI) vii, 54p. (IWMI Working Paper 044) [doi: https://doi.org/10.3910/2009.174]
Lagoons ; Hydrology ; Irrigation effects ; Simulation models ; Sensitivity analysis ; Irrigation programs ; Catchment areas ; Tanks ; Runoff ; Precipitation ; Evaporation ; Seepage ; Climate ; Evapotranspiration ; Paddy fields / Sri Lanka / Karagan Lagoon / Uda Walawe
(Location: IWMI-HQ Call no: IWMI 631.7.1 G744 STA Record No: H030204)
(772 KB)
The extension of the Uda Walawe irrigation scheme in southern Sri Lanka may have a significant ecological impact on the development area and its downstream wetlands. The evaluation of this impact is the subject for a long-term study that is presently being carried out by the International Water Management Institute (IWMI). In this study, the pre- development environmental conditions in the area are being investigated and the changes caused by the new irrigation system will be monitored in the future. Part of this study is a hydrological assessment of the coastal lagoon (Karagan Lewaya) and its small catchment to the south of the evelopment area. The lagoon is likely to receive high quantities of drainage flows from the future scheme. This could deteriorate its water quality and hence affect the suitability of the lagoon as a habitat for migratory birds and might lead to flooding of adjacent settlements.
2 Smakhtin, Vladimir U.; Piyankarage, Sujeewa C.; Stanzel, P.; Boelee, Eline. 2004. Simulating the hydrology of small coastal ecosystems in conditions of limited data. Colombo, Sri Lanka: International Water Management Institute (IWMI). v, 28p. (IWMI Research Report 077) [doi: https://doi.org/10.3910/2009.079]
Hydrology ; Simulation ; Ecosystems ; Lagoons ; Estuaries ; Irrigation effects / Sri Lanka / South Africa / Karagan Lagoon / Bundala Lagoon
(Location: IWMI-HQ Call no: IWMI 631.7.5 G000 SMA Record No: H034783)
(822KB)
The impacts of water resources and irrigation development need to be quantified in order to understand the environmental costs of such development activities. Complex data-intensive simulation methods are normally used for this purpose in the developed world. However, lack of reliable data prohibits the use of such models in developing countries where it is more practical to apply models with less data requirements. The report illustrates three applications of simple and pragmatic simulation models to small coastal water bodies in Sri Lanka and South Africa.
3 Stanzel, P.. 2002. Estimating irrigation-induced changes of water and salinity levels in Karagan Lewaya Lagoon, Sri Lanka. Thesis submitted to the University of Agricultural Sciences, Vienna, in partial fulfillment of the requirements for the degree of Diplomingenieur. viii, 67p.
Lagoons ; Salinity ; Water quality ; Water balance ; Simulation models ; Sensitivity analysis ; Irrigation programs ; Estimation ; Catchment areas ; Tanks ; Climate ; Hydrology ; Rain ; Models ; Satellite surveys / Sri Lanka / Uda Walawe Basin / Karagan Lewaya Lagoon
(Location: IWMI-HQ Call no: D 631.7.1 G744 STA Record No: H035876)
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