Designing river flows to improve food security futures in the Lower Mekong Basin
Rivers provide unrivaled opportunity for clean energy via hydropower, but little is known about the potential impact of dam-building on the food security these rivers provide. In tropical rivers, rainfall drives a periodic flood pulse fueling fish production and delivering nutrition to more than 150...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2017-12, Vol.358 (6368), p.1270-1270 |
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| creator | Sabo, J. L. Ruhi, A. Holtgrieve, G. W. Elliott, V. Arias, M. E. Ngor, Peng Bun Räsänen, T. A. Nam, So |
| description | Rivers provide unrivaled opportunity for clean energy via hydropower, but little is known about the potential impact of dam-building on the food security these rivers provide. In tropical rivers, rainfall drives a periodic flood pulse fueling fish production and delivering nutrition to more than 150 million people worldwide. Hydropower will modulate this flood pulse, thereby threatening food security. We identified variance components of the Mekong River flood pulse that predict yield in one of the largest freshwater fisheries in the world. We used these variance components to design an algorithm for a managed hydrograph to explore future yields. This algorithm mimics attributes of discharge variance that drive fishery yield: prolonged low flows followed by a short flood pulse. Designed flows increased yield by a factor of 3.7 relative to historical hydrology. Managing desired components of discharge variance will lead to greater efficiency in the Lower Mekong Basin food system. |
| doi_str_mv | 10.1126/science.aao1053 |
| format | Article |
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This algorithm mimics attributes of discharge variance that drive fishery yield: prolonged low flows followed by a short flood pulse. Designed flows increased yield by a factor of 3.7 relative to historical hydrology. Managing desired components of discharge variance will lead to greater efficiency in the Lower Mekong Basin food system.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.aao1053</identifier><identifier>PMID: 29217541</identifier><language>eng</language><publisher>United States: American Association for the Advancement of Science</publisher><subject>Agricultural management ; Agronomy ; Algorithms ; Animal Husbandry ; Clean energy ; Climate change ; Dam construction ; Dam engineering ; Dams ; Design ; Discharge ; Downstream effects ; Earth Science ; Ecosystem services ; Energy ; Fisheries ; Flood predictions ; Food ; Food security ; Food Supply ; Forecasting ; Fourier series ; Futures ; Hydroelectric dams ; Hydroelectric power ; Hydroelectric power generation ; Hydrology ; Low flow ; Mathematics ; Mekong Valley ; Nutrition ; Optimization ; Power Plants ; Productivity ; Rainfall ; RESEARCH ARTICLE SUMMARY ; River flow ; Rivers ; Time series</subject><ispartof>Science (American Association for the Advancement of Science), 2017-12, Vol.358 (6368), p.1270-1270</ispartof><rights>Copyright © 2017 by the American Association for the Advancement of Science</rights><rights>Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. 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L.</au><au>Ruhi, A.</au><au>Holtgrieve, G. W.</au><au>Elliott, V.</au><au>Arias, M. E.</au><au>Ngor, Peng Bun</au><au>Räsänen, T. A.</au><au>Nam, So</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Designing river flows to improve food security futures in the Lower Mekong Basin</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>2017-12-08</date><risdate>2017</risdate><volume>358</volume><issue>6368</issue><spage>1270</spage><epage>1270</epage><pages>1270-1270</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>Rivers provide unrivaled opportunity for clean energy via hydropower, but little is known about the potential impact of dam-building on the food security these rivers provide. In tropical rivers, rainfall drives a periodic flood pulse fueling fish production and delivering nutrition to more than 150 million people worldwide. 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| source | American Association for the Advancement of Science; Jstor Complete Legacy; MEDLINE |
| subjects | Agricultural management Agronomy Algorithms Animal Husbandry Clean energy Climate change Dam construction Dam engineering Dams Design Discharge Downstream effects Earth Science Ecosystem services Energy Fisheries Flood predictions Food Food security Food Supply Forecasting Fourier series Futures Hydroelectric dams Hydroelectric power Hydroelectric power generation Hydrology Low flow Mathematics Mekong Valley Nutrition Optimization Power Plants Productivity Rainfall RESEARCH ARTICLE SUMMARY River flow Rivers Time series |
| title | Designing river flows to improve food security futures in the Lower Mekong Basin |
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