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Position: Home > Articles > Calculation of ecological basic flow of Weihe River based on basic flow ratio method Transactions of the Chinese Society of Agricultural Engineering 2011,27 (10) 154-159

基于基流比例法的渭河生态基流计算

作  者：
吴喜军;李怀恩;董颖;林启才
单  位：
西安理工大学西北水资源与环境生态教育部重点实验室;榆林学院建筑工程系
关键词：
计算;水文;生态;水流;生态基流;基流比例;水文年型;保障程度
摘  要：
为使生态基流更好地体现中国北方河流生物需水的年际间和年内变化,该文提出基流比例法。将长期径流系列资料划分为丰、平、枯及特枯年等不同年型,采用传统方法确定某一年型的基流比例后,通过该年型与其他各年型平均径流量之间的比值,推求出基流比例之间的关系,由此计算出其他各年型的基流比例及生态基流值。根据需要,还可进一步将年内划分为不同时段分别计算。以渭河干流宝鸡段为例,应用该方法计算了各年型及年内各时段的生态基流值,其结果为5.02～36.73m3/s,比较后发现其他几种常见方法计算的生态基流值均在该范围之内,各代表年基流的保障程度基本都能达到90%以上,但是近几年呈现递减的趋势。该方法适合中国北方河流生态基流的计算。
译  名：
Calculation of ecological basic flow of Weihe River based on basic flow ratio method
作  者：
Wu Xijun1,2,Li Huaien1※,Dong Ying2,Lin Qicai1(1.Key Laboratory of Northwest Water Resources and Ecological Environment of Ministry of Education,Xi'an University of Technology,Xi'an 710048,China;2.Department of Construction Engineering,Yulin College,Yulin 719000,China)
关键词：
calculations,hydrology,ecology,flow of water,ecological basic flow,basic flow ratio,hydrological year,guarantee degree
摘  要：
To make the ecological basic flow better reflect river life water demand inter-annual and years change in the north of China,the basic flow ratio method was proposed,which divided long-term runoff statistical data into different hydrological years such as wet,normal,dry and special dry.By using traditional methods to determine the basic flow ratio of a certain hydrological year and counting the ratio of average runoff between this hydrological year and other years,the relationship between each basic flow ratio could be ascertained.Thus,the basic flow ratio of other hydrological years and ecological basic flow values could be calculated.Also,the value of ecological basic flow could be calculated for different periods in a year respectively.Taking mainstream of Weihe river in Baoji section as an example,the ecological basic flow was calculated based on basic flow ratio method.The results showed that the ecological basic flow for different hydrological years and periods calculated with this method was 5.00-36.00 m3/s.Results of other methods,such as Tennant and Texas method,were in this scope and guarantee degree of every hydrological year could reach 90%.This method could be applied to calculating the river ecological basic flow in northern China.

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