水文站流量测验代表垂线分析原理及应用  

Principle and Application of Flow Measurement Representative Vertical Line Analysis

作　　者：刘炜[1] 王怀柏[1] 段雯 胡跃斌[1] 李兰涛[1] LIU Wei;WANG Huaibai;DUAN Wen;HU Yuebin;LI Lantao(Hydrology Bureau, YRCC, Zhengzhou 450004, China)

机构地区：[1]黄河水利委员会水文局,河南郑州450004

出　　处：《人民黄河》2019年第4期7-10,共4页Yellow River

基　　金：水利部公益性行业科研专项(201501004)

摘　　要：以龙门水文站基上155断面为例,选取该断面1974—2012年约640个实测断面流量测次作为分析数据集,起点距每隔2 m选取一条垂线,对垂线水深和断面平均水深进行线性回归,并计算决定系数和均方误差,用决定系数作为评价指标,优选出最佳代表垂线位置。结果表明:若在龙门站基上155断面起点距分别为54、188 m处设置固定垂线实测流速和水深,使用回归公式来计算流量,则可以达到标准差229 m^3/s、相对标准差5%的估算精度。The primary flow rate measuring cross-section of Longmen Hydrological Station, named BU155, was selected as the research object. The analysis data set was formed with 640 flow measurements from 1974 to 2012. The sampling positions were set on the cross-section at an interval of 2 meters. For any pair of sampling positions, interpolated velocity and depth were used to estimate flow rate with linear regression algorithm. Then coefficient of determination and mean square error were calculated and, by using the former as the evaluation index, the optimal sampling position pair was determined. The results show that by only measuring velocity and depth at locations of 54 m and 188 m at BU155 cross-section, and calculating the flow rate with the regression formula obtained from the analysis, an estimated accuracy of standard deviation of 229 m^3/s and relative standard deviation 5% can be achieved.

关 键 词：线性回归 代表垂线 流量测验 龙门水文站 

分 类 号：TV856[水利工程—水利水电工程] TV882.1