基于遗传程序的南水北调中线水面线计算
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摘要
目前南水北调中线水面线的推算采用传统恒定非均匀流公式,糙率等水力参数需根据实际情况,定期复核并进行修正,缺乏灵活性。结合中线调度实际,建立了基于遗传程序设计的渠道水面线计算模型,利用遗传程序自动拟合渠段上游节制闸闸后水位与下游节制闸闸前水位、输水流量的非线性关系,从而实现在闸前常水位控制模式下不同输水流量的水面线推算。经在南水北调中线干线工程典型渠段的试用表明,建立的基于遗传程序水面线计算模型灵活性强、拟合精度高、操作方便,具有较高的实际应用价值。
At present,the traditional formula of steady non uniform flow is used to calculate the water surface curve in the South-to-North Water Diversion Middle Route. The hydraulic parameters such as roughness need to be revised commonly according to the actual situation,which lacks flexibility. Combining with the practice of dispatching,a calculation model of channel water surface curve based on genetic programming was established. The non-linear relationship could be automatically fitted by genetic programming,so that the calculation of different water surface curves under the control mode of constant downstream depth operation could be realized. The trial results of typical canal sections of the Middle Route of South-to-North Water Transfer Project show that the water surface curve calculation model based on genetic program is flexible,accurate and easy to operate,and has high practical application value.
At present,the traditional formula of steady non uniform flow is used to calculate the water surface curve in the South-to-North Water Diversion Middle Route. The hydraulic parameters such as roughness need to be revised commonly according to the actual situation,which lacks flexibility. Combining with the practice of dispatching,a calculation model of channel water surface curve based on genetic programming was established. The non-linear relationship could be automatically fitted by genetic programming,so that the calculation of different water surface curves under the control mode of constant downstream depth operation could be realized. The trial results of typical canal sections of the Middle Route of South-to-North Water Transfer Project show that the water surface curve calculation model based on genetic program is flexible,accurate and easy to operate,and has high practical application value.
引文
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[2] CLEMMENS A J,BAUTISTA E,WAHLIN B T,et al. Simulation of Automatic Canal Control Systems[J] Journal of Irrigation and Drainage,2005,131(4):324-335.
[3] CORRIGA G,FANNI A,SANNA S,et al. A Constant Volume Control Method for Open Channel Operation[J].Journal of Modelling and Simulation,1982(2):108-112.
[4]黄会勇,刘子慧,范杰,等.南水北调中线工程输水调度初始控制策略研究[J].人民长江,2012,43(5):13-18.
[5]方神光,吴保生,傅旭东,等.南水北调中线干渠闸门调度运行方式探讨[J].水力发电学报,2008,27(5):93-97.
[6]崔巍,陈文学,姚雄,等.大型输水明渠运行控制模式研究[J].南水北调与水利科技,2009,7(5):6-10.
[7]万晖.长距离明渠输水系统运行调度控制方式研究[D].南京:河海大学,2006:18-20.
[8]王涛,杨开林.调水工程明渠水力控制线性化数学模型[J].南水北调与水利科技,2005,3(3):52-55.
[9]文辉,李风玲.数值积分法计算抛物线形渠道恒定渐变流水面线[J].农业工程学报,2014,30(24):82-86.
[10]张建民,王玉荣,许唯临,等.恒定渐变流水面线计算的一种迭代方法[J].水利学报,2005,36(4):501-504.
[11]任志鹏,陈纯毅,崔广才.一种基于遗传程序设计的数据拟合方法[J].长春理工大学学报(自然科学版),2012,35(2):157-159.
[12]陈晓楠,黄强,邱林,等.基于遗传程序设计的作物水分生产函数研究[J].农业工程学报,2006,22(3):6-9.
[13]魏明华,郑志宏,黄强,等.基于遗传程序设计的产流预报模型[J].沈阳农业大学学报,2011,42(1):84-89.