Renewable and Sustainable Energy Reviews, 2015, Vol.42, p.78(15)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.rser.2014.10.017 Byline: Shaoqing Chen, Bin Chen, Brian D. Fath Abstract: Hydropower is the major renewable energy source for many nations and regions. Dam construction caused direct or indirect detrimental impacts on river systems by altering the water flow pattern and reshaping natural habitats. The dam-induced environmental impact assessment is critical in balancing the human demand for more accessible energy and the ecosystem conservation. In this paper, we proposed information network analysis for assessing environmental impact of hydropower construction based on energy network model of the river system. The framework is capable of evaluating multiple post-dam environmental stressors and tracking energy flows within the disturbed river system. By considering both direct and indirect interactions between system components in the network model, the environmental impacts of sedimentation, discharge change and heavy metal pollution are explicitly evaluated. Dam construction on the upper Mekong River was presented as a case study. The results suggested that the initial dam-induced impact only contributed less than 30% of the cumulative value and that the impact ranking among species, from a network perspective, significantly differed from the traditional toxicological/physiological estimation. Mollusca, benthic-feeding fish and zooplanktivorous fish in the middle trophic levels were most affected by damming, whereas the impact on species at the bottom of the food chain became less prominent in a cumulative way. The most valued species in fishery were found notably impacted and might become endangered because of dam construction. Ad-hoc management actions should be taken to enhance ecosystem conservation and sustainable hydroelectric development in China. By introducing the network approach to the cumulative environmental impact assessment, this study provided insights into a more sustainable path of hydropower construction. Author Affiliation: (a) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China (b) Department of Biological Sciences, Towson University, Towson, MD 21252, USA (c) Advanced Systems Analysis Program, International Institute for Applied Systems Analysis, Laxenburg, Austria Article History: Received 23 May 2014; Revised 20 July 2014; Accepted 5 October 2014
Hydroelectric Power – Case Studies ; Hydroelectric Power – Models ; Electric Power Plant Construction – Case Studies ; Electric Power Plant Construction – Models ; Pollution Control – Case Studies ; Pollution Control – Models ; Hydraulic Flow – Case Studies ; Hydraulic Flow – Models ; Dam Construction – Case Studies ; Dam Construction – Models ; Hydroelectric Construction – Case Studies ; Hydroelectric Construction – Models ; Environmental Impact Analysis – Case Studies ; Environmental Impact Analysis – Models ; Ecosystems – Case Studies ; Ecosystems – Models
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