环境流量作为维持河流生态系统健康运行的一种重要因素,在水资源管理与优化配置中起到越来越重要的作用。为分析淮河干流王家坝径流序列变异情况,并进行环境流量组分分析,进而为水资源优化配置提供参考,采用Mann-Kendall法与Pettitt法对流量序列进行了突变检验; 并应用水文分析技术(IHA)与变化范围法(RVA)进行了环境流量成分与水文生态特征分析; 以淮河流域干流王家坝站为实例进行了应用研究。结果 表明:径流序列在1984年发生突变,突变后流量年平均值有所增加,低流量和高脉冲环境流量成分占比较大,各水文指标均表现为低或中度改变。综上,突变后王家坝生态特征在向好的方向发展,但仍然需要结合生态调度与合理水资源优化配置,进一步改善与维护河流生态系统健康。
As an important factor in maintaining the healthy operation of river ecosystems, environmental flow plays an increasingly important role in water management and optimal allocation. In order to analyze the variation of the runoff series of the Wangjiaba in the Huaihe River, and analyze the composition of the environmental flow, and provide reference for the optimal allocation of water resources, Wangjiaba station of the Huai River Basin main stream was taken as an example, the Mann-Kendall method and the Pettitt method were used to detect the mutation of the flow sequence. The hydrological analysis technique(IHA)and range of variability approach(RVA)were used to analyze the environmental flow composition and hydrological ecological characteristics. The results showed that the runoff sequence of Wangjiaba station was mutated in 1984; the annual average of the flow rate after the mutation had increased, and the low flow rate and high pulse environment flow components accounted for a large proportion. The hydrological indicators were all low or moderate changes. In summary, the ecological characteristics of Wangjiaba after the mutation are developing towards a good direction, but it is still necessary to combine ecological scheduling and rational water resources optimization in order to further improve and maintain the health of the river ecosystem.
