摘要
水库建设及运行对坝下河流-洪泛区系统的生态格局产生显著影响.以海南省万泉河流域牛路岭水库下游加积至河口段为对象,基于河道平面二维水动力模型,开展水库调节对下游河流-洪泛区系统横向连通性的影响研究,重点关注淹没面积量级和频率、长程相关等特性的变化.结果表明:水库调节使得下游大范围的天然水力过渡区转变为淹没区或干燥区,其尖峰厚尾分布特性削弱,极大地降低了洪泛区与主河槽的横向水力联系;淹没范围的长程相关性增加,淹没区与干燥区的交替周期延迟;不同水库调节情景对淹没情势的影响程度差异较大.
Widespread dam constructions can significantly alter the ecological integrity of downstream riverfloodplain system.Based on the two-dimensional hydrodynamic model downstream,the effects of reservoir regulation on lateral river-floodplain connectivity were investigated with Niululing Reservoir in Hainan Province（the section from Jiaji to the estuary）as the research object.The results of magnitude and frequency of submerged area and longrange persistence analysis under different regulation scenarios show that the reservoir operations transform the natural hydraulic transition zones into the submerged areas or the dry areas,and their peaks and thick tails are weakened,which greatly reduce the lateral hydraulic connection between the floodplain and the main channel.Furthermore,dam-influenced scenarios tend to display increased long-range persistence,implying the alternation periods between wet and dry areas become longer.The reservoir regulation scenarios have great influence on the submerged regime.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CSCD
北大核心
2017年第12期1288-1295,共8页
Journal of Tianjin University：Science and Technology
基金
国家重点研发计划资助项目(2016YFC0402203)~~
关键词
水库/大坝
河流-洪泛区系统
横向连通性
长程相关性
去趋势波动分析
reservoir/dam
river-floodplain system
lateral connectivity
long-range persistence
detrended fluctuation analysis
