NDLI: Regional ecosystem changes under different cascade hydropower dam construction scenarios in the LRGR

Content Provider	Springer Nature Link
Author	Zhai, HongJuan Cui, BaoShan Hu, Bo Wei, GuoLiang Liu, ShiLiang
Copyright Year	2007
Abstract	Ecological effects of the cascade hydropower dam construction on ecosystems have acquired much concern from scientists with the expanding of dam development scales in the Longitudinal Range-Gorge Region. In the Lancang River region and Yuanjiang River-Red River region of the Longitudinal Range-Gorge Region (LRGR), an index system has been therefore established to assess the current ecological vulnerability and to predict the likely future ecological vulnerability of these two river regions after the dam constructions. Eight cascade hydropower dam construction scenarios have been established in this paper for forecast. Abrupt change characteristics of the ecosystem have been considered in the calculation. Economic benefits like current supply, navigation and tourisms of the dam construction have not been considered in the calculation. The results show that (1) the current ecological vulnerability values of Lancang River region and Yuanjiang River-Red River region are 0.34 and 0.43 respectively, which would rise to 0.90–0.91 and 0.86–0.89 respectively after the joint work of all the planned dams; (2) abrupt change would happen to both the Lancang River region and Yuanjiang River-Red River region in future; (3) interval construction with high human response is recommended for both the Lancang River region and Yuanjiang River-Red River region, after which their likely ecological vulnerability would rise to 0.56–0.62 and 0.42–0.43 respectively. These results provide a reasonable method and theoretical references to assess the ecological effects of dam construction, and also give prewarnings to other mainstreams of the Longitudinal Range-Gorge Region which are being planned to construct cascade hydropower dams.
Starting Page	106
Ending Page	114
Page Count	9
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	52
Issue Number	2
e-ISSN	18619541
Language	English
Publisher	Science in China Press
Publisher Date	2007-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	scenario analysis ecosystem change ecological vulnerability value cascade hydropower dam construction Longitudinal Range-Gorge Region Life Sciences Physics Chemistry/Food Science Science Geosciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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