基于多尺度熵的人类活动对长江径流影响研究  

Research on impact of human activities on runoff of Yangtze River using multi-scale entropy theory

作　　者：李建[1] 尹炜[1] 雷俊山[1] 杨芳[1] 辛小康[1] 

机构地区：[1]长江水利委员会长江水资源保护科学研究所,湖北武汉430051

出　　处：《人民长江》2013年第7期1-5,共5页Yangtze River

基　　金：水利部公益性项目(201101001)

摘　　要：为研究人类活动对长江径流系统复杂性的影响,利用多尺度熵理论对长江干流典型水文站的日平均流量序列进行了分析。选取寸滩、宜昌和大通站1950～2005年56 a的序列资料,依据长江中上游水利工程的建设情况,将序列资料划分为1950～1977年和1978～2005年两个序列,进行径流熵值对比,并摘录出各序列汛期和非汛期的日平均流量组成新的序列进行熵值计算。结果表明,水土保持和水利工程等人类活动已经在15 d尺度上影响了长江非汛期的流量过程,在10 d的时间尺度上影响了长江中游的基流过程;长江径流系统在单独汛期和非汛期时的复杂性有所降低。In order to study the impact of human activities on the complexity of runoff system of Yangtze River, the multi - scale entropy theory is used to analyze the daily runoffs at typical stations of Cuntan, Yichang and Datong of the main stream on Yangtze River. Daily runoff data of the three hydrological stations from 1950 to 2005 （56 years） are divided into two time series of 1950 - 1977 and 1978 - 2005 to conduct entropy comparison according to the situation of water conservancy projects construc- tion at upper and middle stream of Yangtze River. Daily runoffs in flood season and non - flood season are extracted out respec- tively to form two new time series, and the entropies are also calculated. The study results show that human activities such as soil conservation and water conservancy projects affect the 15 - day scale flow of the river during non - flood season, and influence the 10 - day scale base flow process of the middle Yangtze River; the runoff system complexity of Yangtze River has been reduced to some extent in a single flood and non -flood season.

关 键 词：多尺度熵理论 径流系统 人类活动影响 长江干流 

分 类 号：TV121[水利工程—水文学及水资源]