Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections.
MetadataShow full item record
Gurung, Pabitra; Bharati, Luna. 2012. Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections. Hydro Nepal: Journal of Water, Energy and Environment, April:23-29. (Special issue on "Proceedings of National Conference on Water, Food Security and Climate Change in Nepal" with contributions by IWMI authors).
Permanent link to this item: http://hdl.handle.net/10568/34729
Internet URL: http://publications.iwmi.org/pdf/H044828.pdf
The Melamchi Water Supply Project (MWSP) is designed to minimize the shortage of drinking water in the Kathmandu valley. Although the project was supposed to be completed by 2008, due to various problems, it is still diffi cult to forecast the exact date of completion. This paper quantifi es the downstream effects of diverting water from the Melamchi (Stage-I),Yangri (Stage-II) and Larke (Stage-III) rivers under current as well as future climate scenarios. The Soil Water Assessment Tool (SWAT) was used in the analysis. Result shows that in the Stage-I water transfer plan, average infl ow reduction in the immediate downstream sub-basin in the dry and wet seasons are 36% and 7% respectively, where as in Stage-II the infl ow reductions are 38% for the dry season and 8% for the wet season. In Stage-III, infl ow reductions are 38% in the dry season and 7% in the wet season.The impact of the water transfer schemes on various changes in water management within the Melamchi River irrigation command area was also tested. BUDGET (soil, water and salt balance) model was used to quantify crop water requirement of Melamchi River command area when the irrigated area is increased and the cropping pattern is changed. Simulation results of crop water requirement in intensive water use conditions show that present Melamchi River command area can be increased by 2.2 times under current climate projection, whereas the area can be increased 1.4 times in 2030s and by 2.0 times in 2050s.
SubjectsRIVER BASINS; HYDROLOGY/HYDROGEOLOGY; MULTIPLE USES OF WATER; AGRICULTURAL WATER MANAGEMENT; WATER ACCOUNTING; IMPACT; MODELLING AND SPATIAL ANALYSIS; CLIMATE CHANGE
Showing items related by title, author, creator and subject.
Title:National Water Conference on Status and Future Directions of Water Research in Sri Lanka, BMICH, Colombo, Sri Lanka, 4-6 November 1998. Session 1: Rainwater harvesting; Session 2: Planning and managing water resource systems; Session 3: Rural and urban water supply Date:1998Type:Conference ProceedingsStatus:Open Access
Title:Water security for food security: findings of the Comprehensive Assessment for Sub-Saharan Africa. [This report draws directly from the book Water for food, water for life: a Comprehensive Assessment of Water Management in Agriculture]. Authors:Molden, David J.Date:2008Type:Conference PaperStatus:Open Access
Title:L?eau, source de richesse et de securite alimentaire: soutenir les investissements dans la gestion de l?eau en agriculture axes sur les agriculteurs. Rapport de synthese du projet AgWater Solutions. In French [Water for wealth and food security: supporting farmer-driven investments in agricultural water management. Synthesis report of the AgWater Solutions Project] Date:2012Type:ReportStatus:Open Access