Water and sediment conditions at the Yichang-Chenglingji reach

These files provide the water and sediment condition and bankfull area change at the Yichang-Chenglingji Reach of the Yangtze River. To study the channel adjustment of the Yichang-Chenglingji reach after the closure of the Three Gorges Dam, a 1D morphodynamic model is applied to simulate bed erosion and coarsening processes in cases with different bed substrates. The grainsize distributions of the bed substrate in the cases are also included. The excel file “change in bankfull area” includes the data of the average change in bankfull area at the 32 sub-reaches of the Yichang-Chenglingji reach during 2002-2020. The adjustment classes are also indicated by different colors in the file. The excel file “water discharge and sediment load” shows the annual water discharge and sediment load at Qingxichang, Yichang, Zhicheng, Shashi and Jianli stations during 1991-2020, respectively. The excel file “bed substrate in cases” shows the grainsize distributions in Cases A, B, C, D and S of numerical modeling. <br>

本数据集文件涵盖长江宜昌-城陵矶（Yichang-Chenglingji）河段的水沙情势与平滩面积（bankfull area）变化数据。为探究三峡大坝（Three Gorges Dam）蓄水运行后该河段的河床调整规律，本研究采用一维河床演变动力学模型，针对不同床沙基质工况模拟了河床冲刷与粗化过程，各工况对应的床沙粒径分布数据亦同步收录。名为"change in bankfull area"的Excel文件包含了2002-2020年宜昌-城陵矶河段32个子河段的平滩面积平均变化数据，文件中还以不同颜色标注了河床调整类型。名为"water discharge and sediment load"的Excel文件展示了1991-2020年清溪场、宜昌、枝城、沙市及监利水文站的年径流量与输沙量数据。名为"bed substrate in cases"的Excel文件则呈现了数值模拟工况A、B、C、D及S的床沙粒径分布情况。