Dataset for investigation the sheet flow subjected to raindrop impact

This is the research data on flow velocity for sheet flow subjected to raindrop impact. Experimental setup: The rainfall simulation experiments were conducted in the artificial rainfall simulation hall of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau in Yangling, China. The flume was 6.0 m long, 0.25 m wide, and 0.3 m deep. The bed of the flume was impervious. The downward sprinkler nozzles of the rainfall simulator were set 18 m above the flume. The uniformity of simulated rainfalls was >85%. Experimental design: Flume tests with five rainfall intensities (40, 60, 80, 100, and 120 mm h-1) and three constant inflow discharges (0.02, 0.04, 0.06, 0.08 and 0.1 m2 min-1) and three slope gradient (5.2%, 8.7%, and 12.3%) were simulated for each scenario. Three different bed surfaces (Ks = 0.009, 0.12, and 0.25 mm) were used. The experimental data measurement mainly includes average flow velocity and mean water depth of whole flume. In addition, the dataset also includes video of the water depth measurement of the sheet flow.本数据集为雨滴打击作用下片流（sheet flow）流速的相关研究数据。 实验装置：本实验在中国杨凌黄土高原土壤侵蚀与旱地农业国家重点实验室人工降雨模拟大厅开展降雨模拟试验。试验水槽长6.0 m、宽0.25 m、深0.3 m，槽底为不透水材质。降雨模拟器的向下喷淋喷嘴设置于水槽上方18 m处，模拟降雨均匀度大于85%。 实验设计：本研究针对五种降雨强度（40、60、80、100、120 mm·h⁻¹）、五种恒定入流流量（0.02、0.04、0.06、0.08、0.1 m²·min⁻¹）与三种坡度（5.2%、8.7%、12.3%）开展水槽试验，每种工况均设置三种不同的槽床表面（渗透系数Ks=0.009、0.12、0.25 mm）。实验数据测量主要包含全水槽的平均流速与平均水深。 此外，本数据集还包含片流水深测量的相关视频。