Flow and sediment data on vertical profiles of the ZC, SS, and JL gauges in the Yangtze River

The datasets include the concentration and size gradation of suspended sediment, corresponding water depths and flow velocities on vertical profiles of the ZC, SS, and JL gauges. The duration of the measured data includes 1998–2021 and a few years before the impoundment of the Three Gorges Dam. Most data were recorded in the flood seasons, and the observation frequency varies considerably, with a maximum of 18 times per year, according to peak discharges and their duration in the year. There are 7–13 vertical profiles in each gauging section and 5 or 7 observation points on each vertical profile.本数据集涵盖ZC、SS、JL三个水文测站的观测数据，包含各测站垂向剖面（vertical profiles）上的悬浮泥沙（suspended sediment）浓度与粒径级配、对应水深及流速数据。实测数据的时间跨度为1998年至2021年，同时包含三峡大坝蓄水前的数年观测资料。绝大多数数据采集于汛期，观测频率随当年洪峰流量及其持续时长差异较大，最高可达每年18次。每个测流断面（gauging section）布设7至13条垂向剖面，每条垂向剖面设置5或7个观测点。