平原感潮地区平底闸推流方法研究及实践

Study and Practice on the Method for Calculating the Flow of Sluice in the Tidal Plain Area

通过平均流量×开闸时间计算引排水量,误差通常较大。为提高精度,本文以南沙港闸为例,通过水力学堰闸推流方法建立流量公式,精度满足《水文资料整编规范》中三类定线精度要求。之后计算引水量,发现个别计算结果需要修正,为此引入潮水涨落率,由涨落率确定修正系数,经修正后的引水量系统误差8.9%,标准差0.73,基本满足使用部门要求。

As calculating the amount of water with the average flow by the opening time, the error is usually large. In order to improve the accuracy, the flow formula is created by the hydraulic weir flow method. The accuracy of the formula meets the third grade precision requirements of the Hydrological Data Reduction Code. The accuracy of the formula conforms to the third precision requirement in the hydrological data compilation specification. The calculation of water quantity needs to he corrected, the correction coefficient is determined by the fluctuation rate. The systematic error of the corrected data is 8.9% and the standard deviation is 0.73, basically it meet the requirements of users.