Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections
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 dow...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Nepal Journals Online
2012
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/34729 |
| _version_ | 1855539663138193408 |
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| author | Gurung, Pabitra Bharathi L. |
| author_browse | Bharathi L. Gurung, Pabitra |
| author_facet | Gurung, Pabitra Bharathi L. |
| author_sort | Gurung, Pabitra |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | 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. |
| format | Journal Article |
| id | CGSpace34729 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Nepal Journals Online |
| publisherStr | Nepal Journals Online |
| record_format | dspace |
| spelling | CGSpace347292025-11-13T10:39:10Z Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections Gurung, Pabitra Bharathi L. water supply transfer of waters soil water assessment water management cropping patterns water requirements 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. 2012 2013-11-21T08:41:27Z 2014-02-02T16:39:50Z 2013-11-21T08:41:27Z 2014-02-02T16:39:50Z Journal Article https://hdl.handle.net/10568/34729 en Open Access application/pdf Nepal Journals Online 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). |
| spellingShingle | water supply transfer of waters soil water assessment water management cropping patterns water requirements Gurung, Pabitra Bharathi L. Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title | Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title_full | Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title_fullStr | Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title_full_unstemmed | Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title_short | Downstream impacts of the Melamchi Inter-Basin Water Transfer Plan (MIWTP) under current and future climate change projections |
| title_sort | downstream impacts of the melamchi inter basin water transfer plan miwtp under current and future climate change projections |
| topic | water supply transfer of waters soil water assessment water management cropping patterns water requirements |
| url | https://hdl.handle.net/10568/34729 |
| work_keys_str_mv | AT gurungpabitra downstreamimpactsofthemelamchiinterbasinwatertransferplanmiwtpundercurrentandfutureclimatechangeprojections AT bharathil downstreamimpactsofthemelamchiinterbasinwatertransferplanmiwtpundercurrentandfutureclimatechangeprojections |