A unified formula for discharge capacity of street inlets for urban flood management
نویسندگان
چکیده
Street inlets play a key role in intercepting surface runoff into underground drainage systems, which can reduce the hazard degree during urban flood events. An accurate calculation of discharge capacity street is vitally important numerically modelling floods and managing resilience. A series laboratory experiments were combined with theoretical analysis this study to investigate conveyance characteristics typical grate inlet. large-scale platform was constructed, consisting an upper-layer model measuring system installed V-notch weir structure. inlet used connect upper layers, had complete structure including: grate, drain box, connection tube. total 78 experimental runs conducted using platform, discharges intercepted by measured for range incoming water depths flow velocities, where approaching Froude number varied from 0.05 0.89. These results showed that pattern converted orifice after box fully pressurized. In addition, power function derived between relative velocity through number, based on method dimensional analysis, unified formula proposed calculate inlets. The corresponding coefficients calibrated measurements. verified other obtained previous studies, indicated calculated agreed well these measurements, R2 > 0.90. Therefore, reported herein has high predictive accuracy, be numerical risk management floods.
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ژورنال
عنوان ژورنال: Journal of Hydrology
سال: 2022
ISSN: ['2589-9155']
DOI: https://doi.org/10.1016/j.jhydrol.2022.127667