泥沙测验取样垂线代表性分析——以赣江下游樟树水文站为例

Analysis of the Representativeness of Sampling Vertical Lines in Sediment Measurement—Taking Zhangshu Hydrological Station in the Lower Reaches of the Ganjiang River for Example

摘要: 全自动泥沙在线监测系统的测量原理是根据单点泥沙–断沙率定关系计算出断面平均含沙量，设备需安装在测验断面具有代表性的垂线上。为优化泥沙在线监测设备安装条件，选择较理想的安装位置，提升设备的适用性，本文从主槽垂线含沙量、断面平均含沙量值在断面上的分布范围、各垂线平均含沙量与断面平均含沙量的相关关系等方面对樟树水文站泥沙垂线的代表性进行了分析，优选出泥沙在线监测设备最适宜的安装垂线位置，为泥沙在线监测设备选址安装提供理论依据。

Abstract: The measurement principle of the fully automatic sediment online monitoring system is to calculate the average sediment concentration of the cross-section based on the single-point sediment-discharge relationship. The equipment needs to be installed on a representative vertical line within the measurement cross-section. In order to optimize the installation conditions of sediment online monitoring equipment, select more ideal installation locations, and enhance the applicability of the equipment, in this paper, the representativeness of the sediment vertical lines at Zhangshu Hydrological Station was studied based on statistical analysis of the sediment content of the main channel, the distribution range of the cross-sectional average sediment concentration on the cross-section and the correlation between the average sediment concentration of each vertical line and the cross-sectional average sediment concentration. The optimal vertical line for the installation of the sediment online monitoring equipment was selected, which could provide a theoretical basis for the site selection and installation of the sediment online monitoring equipment.