本文選題：生態(tài)徑流 + 概率密度��； 參考：《水電能源科學》2017年03期

【摘要】：衢江衢州段為典型的山溪性河流,其徑流易受降雨影響而劇烈波動,為計算其生態(tài)徑流,基于1956~2006年衢江衢州段逐日流量資料,利用Mann-Kendall法逐月對徑流數(shù)據(jù)進行突變診斷。選取突變前序列,運用15種偏態(tài)分布函數(shù)逐月擬合日徑流資料,綜合三種擬合優(yōu)度檢驗法的結果,選取最佳擬合函數(shù),取最佳擬合函數(shù)概率密度最大處的徑流為概率密度法的生態(tài)徑流,再結合水文變異指標法及變化范圍法(RVA/IHA)框架下的生態(tài)徑流結果,取二者較大值為最終的生態(tài)徑流過程,并與最枯月頻率法和逐月頻率法的計算結果比較,引入生態(tài)徑流滿足率評價各計算方法的優(yōu)劣。結果表明,逐月頻率法掩蓋了日徑流的劇烈波動,應用于山溪性小型河流的生態(tài)徑流計算不甚合理,概率密度法結合RVA/IHA法的生態(tài)徑流計算方法較合理。研究結果可為其他山溪性小型河流的生態(tài)徑流計算提供參考。
[Abstract]:Quzhou section of Quzhou River is a typical mountain stream, whose runoff is easily affected by rainfall. In order to calculate its ecological runoff, based on the daily discharge data of Quzhou section of Quzhou from 1956 to 2006, the Mann-Kendall method is used to diagnose the abrupt change of runoff data month by month. Selecting the premutation sequence, using 15 kinds of skewness distribution function to fit the daily runoff data every month, synthesizing the results of three kinds of goodness of fit test method, selecting the best fitting function, Taking the best fitting function where the maximum probability density is the ecological runoff of the probability density method, and combining the ecological runoff results under the framework of the hydrological variation index method and the range of variation method (RVA / IHA), taking the larger values of the two as the final ecological runoff process. Compared with the calculation results of the most-withered monthly frequency method and the monthly frequency method, the ecological runoff satisfaction rate was introduced to evaluate the advantages and disadvantages of each calculation method. The results showed that the monthly frequency method masked the violent fluctuation of daily runoff, and the calculation of ecological runoff of small rivers was not reasonable, and the method of probability density method combined with RVA / IHA method was more reasonable than that of RVA / IHA method. The results can be used as a reference for the calculation of ecological runoff of other small mountain rivers.
【作者單位】： 衢州市水土保持監(jiān)督管理站;衢州市水文勘測站;
【基金】：衢州市115人才工程培養(yǎng)人員科技項目
【分類號】：P333

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