湖口水文站单样含沙量取样方案分析

Analysis on measurement method of index sediment concentration at Hukou Hydrological Station

湖口水文站为鄱阳湖出口控制站,属国家级重要水文站,一类精度泥沙测验站。湖口水文站悬移质输沙率传统整编方法为断面平均含沙量过程线法,该方法要求测次较多。为了提高工作效率,通过分析确定单样含沙量取样垂线位置并对单样含沙量-断面平均含沙量关系进行定线检验等,改进了该站传统悬移质输沙率整编方法。结果表明:利用改进后的整编方法对悬移质输沙率进行整编的效果较好,满足现行水文整编规范要求。

Hukou Hydrologic Station is an important control station of Poyang Lake,and it is a national hydrologic station where sediment measurement accuracy is required to reach classification I.The compilation method of crosssection suspended sediment discharge adopted for Hukou Hydrological Station is traditional vertical average sediment concentration method,which requires many times of measurement.To improve work efficiency,we analyzed vertical line position of index sediment concentration,then verified the relationship between index sediment concentration and cross-section average sediment concentration.The results showed that the improved compilation method could meet the requirements of the current hydrologic code,and was available for Hukou Hydrological Station.