基于IHA-RVA法的隔河岩水库 下游水文情势分析  

Analysis for Hydrological Regime of the Lower Reaches of Geheyan Reservoir Based on IHA-RVA Method

作　　者：涂玉律 李英海[1,2] 郭家力[1,2] 聂盼盼 TU Yulyu;LI Yinghai;GUO Jiali;NIE Panpan(College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China;Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡大学三峡库区生态环境教育部工程研究中心,湖北宜昌443002

出　　处：《人民珠江》2020年第11期1-8,共8页Pearl River

基　　金：湖北省教育厅科学技术研究项目(D20201201);三峡库区生态环境教育部工程研究中心开放基金课题(KF2019-13);国家自然科学基金项目(51409152)。

摘　　要：为定量评价隔河岩水库下游河流生态水文情势变化,选取隔河岩水库下游长阳水文站1951—2010年逐日流量数据,以非参数Mann-Kendall趋势检验进行流量趋势分析,应用Mann-Kendall突变检验、滑动t检验和有序聚类进行突变点分析,进而应用生态水文指标变化范围法(IHA-RVA)和水文改变度评价法综合评估隔河岩水库下游长阳河段生态水文情势变化。结果表明:长阳站年均径流呈不明显的下降趋势,并在2000年发生突变,其整体水文改变情况为58%的中度改变,而改变最为明显的指标为河流基流指数、年最小流量出现时间、低流量脉冲历时和逆转次数。该研究可为清江流域水生态保护提供参考。In order to evaluate quantitatively the change of ecological and hydrological regime of the lower reaches of Geheyan reservoir,based on the daily flow data of Changyang hydrological station from 1951 to 2010,this paper analyzes the flow trend with the non-parameter Mann-Kendall trend test,and the abrupt change points by Mann-Kendall test,moving t test and ordered clustering,and then comprehensively evaluates the ecological and hydrological changes of Changyang section at the lower reaches of the Geheyan reservoir with IHA-RVA(indicators of hydrologic alteration and range of variability approach)and hydrological alteration degree evaluation.The results show that:The annual average runoff of Changyang station shows unobvious downward trend.In 2000,there was an abrupt change.In overall,the hydrological regime is featured with 58%of moderate change,and indicators with the most obvious change are the base flow index,time of annual minimum flow,duration of low flow pulse and number of reversals,which can provide reference for water ecological protection of Qingjiang River Basin.

关 键 词：IHA-RVA法 生态水文 水文改变度 隔河岩水库 

分 类 号：TV697[水利工程—水利水电工程]