摘要
为探究水电梯级开发对河流生境连通性的影响,以大渡河流域为例,通过资料收集与遥感影像识别,确定了流域内的135个水电站位置信息;采用河流连通指数量化了河流的生境连通性;分析了水电开发对连通性的影响因素,并提出了一种耦合连通性与电站效益的连通性优化路径。结果表明:(1)当前大渡河流域的河流连通指数RCI为16.68,未来随着所有规划电站的建成,这一值将降为4.2,RCI的空间分布呈现从上游向下游递减趋势。(2)相较于位于河源及河口的电站,位于河网中央的电站造成的影响更大。(3)不同的水电开发规划对连通性的影响差异显著,通过合理的规划,可以在保证水电开发效益的情况下有效地改善河流生境连通性。本研究旨在为河流生境连通性恢复与流域战略规划提供方法支持和理论参考。
This study examines the impact of hydropower development on river habitat connectivity,and develops a connectivity optimization path coupling connectivity and benefits,through a case study of the Dadu River basin.We create a database for the 135 hydropower stations in the basin through data collection and remote sensing image identification,and quantify river habitat connectivity using the River Connectivity Index(RCI).The results show that 1) the RCI of this basin is 16.68 at present and will decrease to 4.2 when all the planned power stations are completed in the future,and that the spatial distribution of RCI shows a decreasing trend from upstream to downstream.2) Hydropower stations located in the middle of the river network have a greater impact than those located in its headwater region or near its tributary.3) The impact of different hydropower development plans on the connectivity varies significantly,and the connectivity can be improved effectively through reasonable planning while ensuring the development benefits.This study would help river habitat connectivity restoration and watershed strategic planning.
作者
何晓枫
黄翔
陈旻
李嘉
安瑞冬
HE Xiaofeng;HUANG Xiang;CHEN Min;LI Jia;AN Ruidong(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;CHN Energy Dadu River Basin Hydropower Development Co.,Ltd,Chengdu 610041,China)
出处
《水力发电学报》
CSCD
北大核心
2023年第8期32-41,共10页
Journal of Hydroelectric Engineering
基金
国家自然科学基金项目(52122904)
水利部重大科技项目(SKS-2022121)。
关键词
河流连通指数
生境连通性
河流片段化
连通性恢复
river connectivity index
habitat connectivity
river fragmentation
connectivity restoration
作者简介
何晓枫(1998-),男,硕士生.E-mail:hexiaofeng_scu@163.com;通信作者:安瑞冬(1983-),男,研究员.E-mail:anruidong@scu.edu.cn。
