【摘要】 汉江流域地表径流受气候变化和人类活动的影响发生了显著变化，基于此，收集了汉江流域的径流与降水数据，利用基于流量历时曲线的生态水文指标分析水文变异后生态径流的变化特征，并根据降水距平与生态指标的关系，分析降水对生态径流的影响。结果表明：突变后高流量出现次数降低，导致生态剩余的减少和生态赤字的增加。2010年之前生态赤字处于增加趋势；大部分流域在年、春季、夏季和秋季的降水—生态径流指标具有明显的相关性，冬季生态径流主要受水库的调蓄作用。研究表明，生态径流指标解决了水文改变指标法IHA(Indicators of Hydrologic Alteration)指标之间的冗余等问题，更适合用来分析水文情势的变化特征。更多还原

【Abstract】 The surface hydrology of the Hanjiang River basin has changed significantly under the influence of climate change and human activities. Based on this, the runoff and precipitation data of the Hanjiang River basin were collected, and the ecological hydrological index based on the flow duration curve was used to analyze the change characteristics of the ecological runoff after hydrological variation. According to the relationship between precipitation anomaly and ecological index, the influence of precipitation on ecological runoff was analyzed. The results showed that the frequency of high discharge decreased after the mutation, which resulted in the decrease of ecological surplus and the increase of ecological deficit. The ecological deficit will increase until 2010. The precipitation and ecological runoff indexes of most river basins have obvious correlation in annual, spring, summer and autumn, and the ecological runoff in winter is mainly regulated and stored by the reservoir. The results show that the ecological runoff index solves the redundancy problem among IHA indexes and can be used to analyze the change characteristics of hydrological regime.更多还原