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基于底栖动物多样性恢复的减脱水河段生态流量核算
引用本文:赵伟华,杜琦,郭伟杰.基于底栖动物多样性恢复的减脱水河段生态流量核算[J].水生态学杂志,2020,41(5):49-54.
作者姓名:赵伟华  杜琦  郭伟杰
作者单位:长江科学院,长江科学院,长江科学院
基金项目:国家重点基础研究发展计划(973计划)
摘    要:本文以澜沧江支流景谷河引水式电站形成的过渡区减脱水河段为研究区域,根据底栖动物的丰度、生物多样性对适宜栖息地水深、流速的需求,采用栖息地模拟法建立景谷河减脱水过渡区生态流量核算方法。结果表明,研究河段69.0%的底栖动物种类在边滩中出现,47.30%在浅濑中出现,因此,边滩和浅濑是维持底栖动多样性的最优生境类型。模拟了13种工况下底栖动物最适栖息地面积的变化情况,最终确定景谷河减水河段底栖动物最适的生态流量需求为3.0-4.0m3/s。本文为以水生生物实际需求为目标的生态流量核算奠定了基础。

关 键 词:生态流量  引水式小水电  核算方法  底栖动物
收稿时间:2020/7/30 0:00:00
修稿时间:2020/10/18 0:00:00

Establishing the Ecological Flow of Dewatered River Reaches based on Restoration of Macroinvertebrates Diversity
ZHAO Wei-hu,DU Qi,GUO Wei-jie.Establishing the Ecological Flow of Dewatered River Reaches based on Restoration of Macroinvertebrates Diversity[J].Journal of Hydroecology,2020,41(5):49-54.
Authors:ZHAO Wei-hu  DU Qi  GUO Wei-jie
Institution:Changjiang River Scientific Research Institute,Changjiang River Scientific Research Institute,Changjiang River Scientific Research Institute
Abstract:In this paper, the study area was dehydration river reaches - the transition area of the diversion-type hydropower station of Jinggu River, a tributary of Lancang River. Based on the demand of macroinvertebrates abundance and biodiversity for suitable water depth and flow velocity, the environmental flow accounting method of Jinggu River transition area was established by habitat simulation method. The results showed that 69.0% of the macroinvertebrates species in the research appeared in the point bar and 47.30% in the riffle. Therefore, the point bar and the riffle were the optimal habitat types to maintain the diversity of macroinvertebrates. The changes in the optimal habitat area of macroinvertebrates under 13 working conditions were simulated, and the optimal environmental flow demand for macroinvertebrates in the reduced water section of Jinggu River was finally determined to be 3.0-4.0m3/s. This paper lays a foundation for the environmental flow accounting method aiming at the actual demand of aquatic organisms.
Keywords:Environmental flow  Diversion-type hydropower station  Accounting methods  Macroinvertebrates
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