南水水库汛期降水集中度和集中期与径流年内分配探讨  

Concentration Ratio-based Discussion on Flood-season Stages for Nanshui Reservoir

作　　者：张桐华 焦晓东 ZHANG Tong-hua;JIAO Xiao-dong(North China University of Water Resources and Electric Power,Zhengzhou 450000,China;Shaoguan 512600,Guangdong,)

机构地区：[1]华北水利水电大学,郑州450000 [2]广东粤电南水发电有限责任公司,广东韶关512700

出　　处：《水利科技与经济》2018年第8期52-57,共6页Water Conservancy Science and Technology and Economy

摘　　要：以南水水库流域1970~2016年的径流量资料为基础,为研究该流域径流年内变化的一般特征、径流在汛期的集中程度和汛期分期的变化,采用径流年内不均匀分配系数、年内完全调节系数等,并在汛期采用集中期和集中度的方法进行初步探讨。研究表明,汛期径流分配的集中期和集中度越大,该流域发生洪水的概率也就越高;汛期径流分配集中度呈增大趋势,表明汛期径流分配逐渐趋于不均匀。The general feature of the intra-annual variation of the stages of flood-season is analyzed by using a time series of runoff data in Nanshui Reservoir Basin from 1970 to 2016,with intra-annual nonuniform distribution coefficients and intra-annual full-regulation coefficients of the runoff. And concentration period and concentration ratio was used to reveal the concentration degree of the runoff in flood-season,then the variation of the flood-season stages is discussed. The results show that the larger concentration degree of runoff distribution in flood-season,the higher possibility a flood may occur. At the same time,runoff distribution is uneven,with an increasing tendcy. It is necessary to take into account of the increasing amount of water storage in order to make better use of water resource.

关 键 词：径流量 年内分配 不均匀性 集中度 南水水库 

分 类 号：TV697.1[水利工程—水利水电工程]