Experimental clay-laden density flow velocity and deposit data from the Eurotank laboratory

This dataset contains flume experiment data from a series of runs that were performed at the Eurotank laboratory of Utrecht university. It includes velocity data as well as photographs that were taken from the deposits emplaced by the density flows inside the flume. The flume was 3.7 m long, 0.22 m wide, and 0.5 m high with glass side walls. For the experiments, the slope was adjusted to 6, 8, and 9.5 degrees. Before the runs, mixtures composed of 1) sand, silt, clay, and water or, 2) sand, clay, and water, were prepared and stirred for approximately 30 minutes to 2 hours in a 0.45 m3 mixing tank and the flume was filled with tap water. The sediment volume concentration was varied between 9%, 15%, and 21% and contained 2/3 sand and 1/3 clay for the runs without silt and 1/3 sand, 1/3 silt, and 1/3 clay, for the runs including silt. The mixtures were then pumped with a discharge rate of 10 or 15 m3/h into the flume. Velocity data was obtained using two Ultrasonic Doppler Velocity Profiler probes (UVP Duo Mx, 1 MHz) which were placed at 0.7 m and 2.7 m distance from the inlet, at a height of 0.11 m above the bed, and with an abgle of 60 degree to the bed, facing up stream. This dataset was used in Hermidas et al., 2018 to classify clay-rich subaqueous density flow structures.

本数据集包含乌得勒支大学欧洲水槽（Eurotank）实验室开展的系列水槽实验数据，涵盖流速数据与水槽内密度流沉积体的实拍照片。该水槽长3.7米、宽0.22米、高0.5米，侧壁采用玻璃材质。实验设置的坡度为6°、8°和9.5°。实验前，分别配制两类混合物料：其一为砂、粉砂、黏土与水的混合物，其二为砂、黏土与水的混合物；将配制好的混合物置于容积为0.45立方米的搅拌罐中搅拌约30分钟至2小时，随后向水槽内注入自来水。沉积物体积浓度设置为9%、15%和21%，其中不含粉砂的实验组物料配比为2/3砂+1/3黏土，含粉砂的实验组配比为1/3砂+1/3粉砂+1/3黏土。随后以10或15立方米每小时的流量将混合物料泵入水槽。流速数据通过两台超声多普勒流速剖面仪（Ultrasonic Doppler Velocity Profiler, UVP）探头（型号为UVP Duo Mx，工作频率1 MHz）获取，探头分别布置在距进水口0.7米和2.7米处，距水槽床底高度0.11米，与床底夹角60°且朝向水流上游。该数据集曾被Hermidas等人于2018年用于富黏土水下密度流结构的分类研究。