Author(s): Qi Zhou, Chunbo Jiang, Jian Liu, Wangyang Yu, Albert S. Chen
Linked Author(s): Qi Zhou
Keywords: Hydraulic jump, experiment model, dividing flow, urban streets, flood
Abstract: Urban flood is becoming more severe due to rapid urbanization and global climate change in past decades. High discharge in steep slope environment often causes supercritical flow, which leads to hydraulic jumps around the slope transition area. A simplified physical model was designed to investigate hydraulic jumps under various dividing flow conditions. A series of tests performed inside a circulation water flume, were completed, that covered a range of lateral outflow positions and Froude numbers. Four dividing streets controlled separately, were set on the two sides of the main street. The flow regimes and time averaged water depth profiles under various incoming discharge ratios were obtained. The hydraulic jump characteristics (jump toes, roller length, conjugate depth ratios, etc. ), were different from the classical hydraulic jumps. The relationships between conjugate depth, discharge ratios, and dividing flow positions were determined. The obtained experiment data can be readily used for urban cities designs and flood protect policymaking, as well as validating or calibrating numerical models for urban flood simulations
Year: 2017