黄河下游河道断面加密观测数据（2020年汛期技术示范期）

清水沟部分统测断面加密观测数据。黄河道断面测量严格依据《黄河下游河道测验技术试行规定》、《黄河下游河道测验手册》、《河道测验补充规定》和《GPS、全站仪河道测验技术规定》执行，河道断面陆地部分采用GPS-RTK采集、水道全部采用中海达HD-MAX测深仪和GPS联机测验，水道应用冲锋舟载人测验。

Densified observation data for partial unified-survey sections in Qingshuigou. Channel surveys of the Lower Yellow River were strictly conducted in accordance with the *Trial Regulations on River Channel Survey Technology for the Lower Yellow River*, *Manual for River Channel Survey of the Lower Yellow River*, *Supplementary Provisions on River Channel Survey*, and *Technical Regulations for River Channel Survey Using GPS and Total Station*. For land portions of the river channels, data was collected via GPS-RTK; all waterway sections were surveyed using an integrated system of Hi-Target HD-MAX echo sounder and GPS, with waterway surveys carried out by personnel aboard assault boats.