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

Description

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.

Steps to reproduce

The data is also offered by the Bureau of Hydrology, Changjiang Water Resources Commission. The concentration of each grain-size group can be obtained through the suspended sediment concentrations and size gradations of each vertical profile. In the research, we investigated the relationships between the concentration of each grain-size group and its corresponding U3/ghω. U3/ghω is a flow capacity index. U is the depth-averaged flow velocity (L/T); g is the gravitational acceleration (L/T2); h is the water depth (L); and ω is the settling velocity of the suspended sediment group (L/T).

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