globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-18-5303-2014
Scopus记录号: 2-s2.0-84919624580
论文题名:
Dams on Mekong tributaries as significant contributors of hydrological alterations to the Tonle Sap Floodplain in Cambodia
作者: Arias M; E; , Piman T; , Lauri H; , Cochrane T; A; , Kummu M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期:12
起始页码: 5303
结束页码: 5315
语种: 英语
Scopus关键词: Banks (bodies of water) ; Dams ; Ecology ; Floods ; Hydroelectric power ; Hydroelectric power plants ; Water levels ; Water resources ; Development scenarios ; Feasible alternatives ; Hydro-power development ; Hydro-power generation ; Hydrological alterations ; Hydropower potential ; Infrastructure development ; Water resources development ; Rivers ; economic analysis ; hydroelectric power ; numerical model ; power generation ; sustainable development ; water level ; Cambodia ; Mekong Basin ; Tonle Sap Lake
英文摘要: River tributaries have a key role in the biophysical functioning of the Mekong Basin. Of particular interest are the Sesan, Srepok, and Sekong (3S) rivers, which contribute nearly a quarter of the total Mekong discharge. Forty two dams are proposed in the 3S, and once completed they will exceed the active storage of China's large dam cascade in the Upper Mekong. Given their proximity to the Lower Mekong floodplains, the 3S dams could alter the flood-pulse hydrology driving the productivity of downstream ecosystems. Therefore, the main objective of this study was to quantify how hydropower development in the 3S, together with definite future (DF) plans for infrastructure development through the basin, would alter the hydrology of the Tonle Sap's Floodplain, the largest wetland in the Mekong and home to one of the most productive inland fisheries in the world. We coupled results from four numerical models representing the basin's surface hydrology, water resources development, and floodplain hydrodynamics. The scale of alterations caused by hydropower in the 3S was compared with the basin's DF scenario driven by the Upper Mekong dam cascade. The DF or the 3S development scenarios could independently increase Tonle Sap's 30-day minimum water levels by 30 ± 5 cm and decrease annual water level fall rates by 0.30 ± 0.05 cm day-1. When analyzed together (DF + 3S), these scenarios are likely to eliminate all baseline conditions (1986-2000) of extreme low water levels, a particularly important component of Tonle Sap's environmental flows. Given the ongoing trends and large economic incentives in the hydropower business in the region, there is a high possibility that most of the 3S hydropower potential will be exploited and that dams will be built even in locations where there is a high risk of ecological disruption. Hence, retrofitting current designs and operations to promote sustainable hydropower practices that optimize multiple river services - rather than just maximize hydropower generation - appear to be the most feasible alternative to mitigate hydropower-related disruptions in the Mekong. © Author(s) 2014.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78032
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作者单位: Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch, New Zealand; Mekong River Commission, Vientiane, Laos; EIA Finland Ltd, Espoo, Finland; Water and Development Research Group, Aalto University, Espoo, Finland; Sustainability Science Program, Harvard University, Cambridge, United States

Recommended Citation:
Arias M,E,, Piman T,et al. Dams on Mekong tributaries as significant contributors of hydrological alterations to the Tonle Sap Floodplain in Cambodia[J]. Hydrology and Earth System Sciences,2014-01-01,18(12)
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