基于生态指标的水库影响下河流水文情势评价  

Evaluation of river hydrological regime under the influence of reservoir based on ecological index

作　　者：王东 Wang Dong(Liaoning River Reservoir Management Service Center,Liaoning Hydrology Bureau,Shenyang1110003,Liaoning,China)

机构地区：[1]辽宁省河库管理服务中心(辽宁省水文局),辽宁沈阳110003

出　　处：《吉林水利》2021年第9期10-14,共5页Jilin Water Resources

摘　　要：本文通过基于FDC的生态指标综合评价了太子河流域上水库建设对水文情势的影响。结果表明:(1)水库建设后,秋季高流量组分与发生频率减小,春季和夏季低流量组分值显著增加;(2)年生态盈余受水库影响小,生态赤字受水库影响较大,季节生态指标受水库影响较大,尤其在春季和夏季。Reservoirs not only meet a variety of human needs,but also cause changes in the hydrological situation of the lower reaches,thus affecting the ecological diversity of rivers.Therefore,the study of hydrological changes and ecological effects caused by reservoirs is of great significance to guide reservoir regulation to protect river ecology.Taking Taizihe River as an example,the impacts from reservoir construction on hydrological regime is comprehensively evaluated with ecological indicators based on FDC.The results show that:(1)the ecological indicators can be used to analyze the interannual and seasonal variation of discharge after the reservoir construction.After the reservoir construction,the high flow components and occurrence frequency decreased,especially in autumn,and the low flow components increased significantly,especially in spring and summer.(2)The relationship between ecological indicators and precipitation can reflect the main influencing factors.The annual ecological surplus is less affected by the reservoir.The ecological deficit is more affected by the reservoir and the seasonal ecological index is more affected by the reservoir as well especially in spring and summer.

关 键 词：水库影响 生态赤字 生态盈余 水文情势 

分 类 号：P343.9[天文地球—水文科学]