摘要
为了定量评价人类活动对河道径流的影响,应用变化范围法(RVA法)评估了三峡水库运行后对长江中下游水文情势的影响。利用三峡水库以下6个水文站1961～1985年和2003～2008年的日均流量作为建库前后的资料进行IHA指标计算,分析了32个水文改变指标的中值及离差系数。结果表明,三峡水库运行后,在不同的丰枯水期,对长江中下游的影响程度是不同的,且影响分布沿河流流向逐渐减弱。总体来说,三峡水库运行对长江中下游的径流影响属于中度改变。
In order to evaluate the influence of human activities on river runoff, the range of variability approach （RVA） is adopted to assess the flow regime of the middle and lower reaches of Yangtze River after the operation of Three Gorges Reservoir. Based on the daily flow data from 1961 to 1985 and 2003 to 2008 at the 6 downstream stations of Three Gorges Reservoir, by analyzing the median and coefficient of deviation of the 32 indicators of hydrologic alteration （IHA）, we conclude that the influence degree is different in dry and wet seasons, and decreases from upper to lower reach. In general, the influence of operation of Three Gorges Reservoir on runoff is moderate.
出处
《人民长江》
北大核心
2012年第5期22-25,共4页
Yangtze River
关键词
RVA法
水文改变指标
水文情势
影响程度
三峡水库
range of variability approach （RVA）
indicator of hydrologic alteration （IHA）
hydrology regime
influential degree
Three Gorges Reservoir
