摘要
自然水文过程对于维护长江上游保护区生态系统健康有重要作用。本文基于朱沱站1971-2011年逐日流量数据,通过有序聚类分析法对月均流量进行突变分析,并结合前人研究成果认为1990年以后保护区干流的水文过程受到较大干扰。采用IHA指标量化干扰前后的生态水文过程,并通过RVA法确定生态水文保护目标和评估干扰前后的变化程度。结果表明,1990年以后1月、10月、11月和12月平均流量变化程度大;枯水期流量有所增加的原因可能是水库的调度运行;而汛期部分指标有中等程度变化可能与径流量减少有关。
Eco-hydrological process is a key factor in sustaining ecological systems health in the nature reserves of the upper Yangtze reaches.This study adopts an IHA method to quantify the eco-hydrological process and a RVA method to determine the manage target range and evaluate eco-hydrological alteration.A mutability analysis has been made for the monthly mean flow at the Zhutuo gauge station using its daily flow records.It is concluded that since 1990,the hydrological process in the reserves has been interfered; the flow in dry season has increased due to the reservoir operation while the flow in flood season not significantly influenced by human activities.
出处
《水力发电学报》
EI
CSCD
北大核心
2014年第3期106-111,共6页
Journal of Hydroelectric Engineering
基金
国家"十二五"科技支撑计划(2012BAC06B01)
国家"十二五"科技支撑课题(2013BAB06B03)
长江三峡集团公司项目(07011033)
关键词
生态水文变化
水文变化指标法
变化范围法
保护区
长江
eco-hydrological alteration
indicators of hydrological alteration （IHA）
ranges of variability approach （RVA）
the reserve
Yangtze River
