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Climate Scenario Identification and Evaluation of Irrigation Responses: Case Study Application of Rambakan Oya Reservoir Using Irrigation Department Guidelines

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dc.contributor.author Deshapriya, WVK
dc.contributor.author Wijesekera, NTS
dc.date.accessioned 2018-09-07T23:57:23Z
dc.date.available 2018-09-07T23:57:23Z
dc.identifier.uri http://dl.lib.mrt.ac.lk/handle/123/13485
dc.description.abstract Present study was carried out to demonstrate the capability of Irrigation Department Guideline (IDG) model to assess climate change impacts under variety of scenarios by carrying out a case study of Rambakan oya irrigation scheme. The IDG model was optimized for the current irrigable area and verified by checking the irrigable area, spilling months, maximum and minimum storages with qualitative field assessments. Six climate change scenario were developed and three scenarios were identified as critical scenario after evaluating the possible impacts on cultivation extents. Critical scenario were incorporated in to the optimized model in order to evaluate the response and it was observed that a 30% decrease in north-east monsoon (December to February) and 30% increase in south-west monsoon (May to September) keeping the annual total constant would give rise to the highest impact. Annual irrigation demand of Ramabakan Oya reservoir increases by 3% and the cropping intensity reduces from 1.0 to 0.76 and 0.83 to 0.72 in maha and yala seasons respectively. Since cropping intensity of the Rambakan Oya could reduce up to 20% under future climate change scenario, it would be better to incorporate adaptation measures to execute water management plans in the future. Project efficiency enhancement of 7% will allow the present cropping intensity to be maintained under the worst-case scenario for Rambakan oya irrigation scheme en_US
dc.language.iso en en_US
dc.subject Climate change en_US
dc.subject Impacts en_US
dc.subject Irrigation schemes en_US
dc.subject Rambakan oya en_US
dc.title Climate Scenario Identification and Evaluation of Irrigation Responses: Case Study Application of Rambakan Oya Reservoir Using Irrigation Department Guidelines en_US
dc.type Conference-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Deparment of Civil Engineering en_US
dc.identifier.year 2017 en_US
dc.identifier.conference UMCSAWM Water Conference – 2017 en_US
dc.identifier.place Moratuwa en_US
dc.identifier.pgnos 15-19 en_US
dc.identifier.proceeding Proceeding of the UMCSAWM Water Conference on Demonstrating the strength of water Engineering and Management capability through case study applications en_US


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  • 2017 [21]
    UMCSAWM Water Conference on Demonstrating the Strength of Water Engineering and Management Capability through Case Study Applications

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