黄河山东段低水期流速流向分布分析

依据《河流流量测验规范》及相关规定,对黄河下游山东测区低水时期流速、流向的垂线分布进行了试验分析。结果表明,孙口、利津两站能反映山东测区各干流水文站的基本水文特性,各站常用的2点法具有良好的代表性、可靠性,一点法代表性不好;采用施测水面流向替代垂线平均流向,对垂线平均流速和断面流量的精度影响很小,各项误差均在规范规定的允许范围之内。

Analysis on Velocity, Direction and Distribution of Flow in Low-Water Period of the Yellow River in Shandong Section

According to "River Discharge Measurement Criterion" and related regulations,the paper tests and analyzes the velocity and vertical distribution of flow direction in low-water period of measured region of Shandong section of the Yellow River.The outcomes show that the stations of Sunkou and Lijin can reflect the basic hydrologic characteristics of each station on the main river in Shandong measured region and the 2-point method which is commonly used by each station has good representativeness and reliability while the representativeness of 1-point method is not good and;the influence of observed surface direction replacing the mean vertical direction to the precision of mean vertical velocity and cross section discharge is very small and each error all within the allowable range of the criterion.