您好，欢迎访问中国水产科学研究院 机构知识库！
中国水产科学研究院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Environmental Assessment of a Free-flowing High-biodiversity Stretch of the Upper Yangtze River: Implications for River Management

文献类型： 外文期刊

作者： Zhang, Hui 1 ; Wei, Qiwei 1 ; Sun, Liyuan 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Hubei Province, Peoples R China

关键词： Protected reach;River habitat;Pool;Run;Riffle

期刊名称：PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II

ISSN：

年卷期： 2013 年

页码：

收录情况： SCI

摘要： The Upper Yangtze (Changjiang) aquatic ecosystem supports some of the world's highest fish diversity. Three international critically endangered fishes and 67 endemic fish species, are reported to inhabit this area. It is also a rich hydropower resource, with 20 dams constructed or planned, which is transforming the reaches into a dam/reservoir system. A scientific assessment of the ecology of a remaining free-flowing stretch encompassing the Upper Yangtze National Reserve is critically important. A physical environment survey was conducted in a free-flowing reach (411.5 km river length, 93.1% of the length is included in a national nature reserve) of the Upper Yangtze main stream from Chongqing to the Xiangjiaba Dam using a 600 kHz Acoustic Doppler Current Profiler. A total of 20,558 effective survey points along the river channel thalweg indicated that: the water depth range was 3.40-60.73 m (mean 12.51 +/- 8.03 m), and the commonest depth range within seven of the nine defined sub-reaches was 5.0-10.0 m; the range in depth-averaged velocity (DAV) was 17.48-397.69 cm/s (mean 159.34 +/- 61.26 cm/s), with the most common velocity range in seven of the sub-reaches being 100.0-150.0 cm/s; the mean Froude number (Fr) was 0.171 +/- 0.095 (range 0.010-0.513) with 0.10-0.15 the most common Fr range within six of the sub-reaches. Habitat classification methods based on 1) the Fr and 2) the Fr combined with water depth and DAV revealed a saturation index of 0.79-0.91 and 0.61-0.83, respectively. Pools are the rarest habitat type and need to be protected. We strongly urge a moratorium on dam construction in this area to maintain it as a free-flowing river to conserve the habitat and its fish diversity.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国水产科学研究院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台