黑河干流引水式水电站生态流量计算  

Calculation of Ecological Flow of Diversion Hydropower Station in the Main Stream of Heihe River

作　　者：宋增芳[1] 程玉菲[1] 李莉[1] 王文娟[1] SONG Zengfang;CHENG Yufei;LI Li;WANG Wenjuan(Gansu Research Institute for Water Conservancy,Lanzhou 730000,China)

机构地区：[1]甘肃省水利科学研究院,甘肃兰州730000

出　　处：《人民黄河》2021年第3期112-115,共4页Yellow River

基　　金：2018年陇原青年创新创业人才项目(甘组通字[2018]81号);甘肃省水利科研与技术推广计划项目(甘水科外发[2018]70号)。

摘　　要：祁连山区水电站建设改变了下游河道的水文条件,枯水期减水河段出现断流,河流自净能力减弱,河道污染加剧,为了恢复祁连山区水生生物的生态环境,运用改进的Tennant法评价标准对年内展布法、改进年内展布法、逐月最小生态流量、NGPRP法4种常用的生态流量计算方法进行合理性检验,选用评价结果较好的NGPRP法与改进年内展布法,计算了莺落峡站各月最小生态流量,在此基础上,结合水文比拟法计算了黑河干流7座引水式电站各月最小生态流量。黑河干流各水电站最小生态流量各月均值为8.43~83.99 m^(3)/s,呈现先增大后减小的变化趋势,从1月开始逐渐增大,7月达到最大值,8—12月最小生态流量持续减小。The construction of hydropower stations in Qilian Mountains has changed the hydrological conditions of the lower reaches of the river.In the dry season,the flow of the reduced river reaches is cut off,the self purification capacity of the river is weakened and the pollution of the river is aggravated.In order to restore the ecological environment of aquatic organisms in Qilian Mountain area,the improved Tennant method was used to test the rationality of four commonly used ecological flow calculation methods,namely,the improved annual distribution method,the monthly minimum ecological flow,the annual distribution method and the NGPRP method.The evaluation results of NGPRP method and improved year distribution method are the best,which are combined to calculate the monthly minimum ecological flow of Yingluoxia Station.On this basis,the monthly minimum ecological flow of 7 diversion power stations the main stream of Heihe River was calculated by hydrological analogy method.The average monthly variation of the minimum ecological flow of each diversion type power station in the main stream of Heihe River is 8.43-83.99 m^(3)/s,showing a trend of increasing at first and then decreasing,gradually increasing from January to reaching the maximum value in July and decreasing continuously from July to December.

关 键 词：引水式水电站 Tennant评价标准 改进年内展布法 黑河干流 

分 类 号：X522[环境科学与工程—环境工程] TV74[水利工程—水利水电工程]