contributor author | Lu Wang | |
contributor author | Bruce W. Melville | |
contributor author | Colin N. Whittaker | |
contributor author | Dawei Guan | |
date accessioned | 2022-01-30T20:38:22Z | |
date available | 2022-01-30T20:38:22Z | |
date issued | 3/1/2020 12:00:00 AM | |
identifier other | %28ASCE%29HY.1943-7900.0001712.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4266854 | |
description abstract | Equilibrium clear-water scour depths predicted by existing equations based on the peak flow rate of a flood hydrograph can be overly conservative for submerged weirs in mild-slope sandy rivers, because the equilibrium timescale normally is much larger than the timescale of a flood event. Therefore it is important to understand the clear-water scour development at submerged weirs in order to improve the accuracy of scour estimation. This paper presents new data on the temporal evolution of the downstream clear-water scour depth at a submerged weir under steady flow conditions and analyzed the impacts of flow intensity, weir height, sand coarseness parameter, and weir slope on the development of the downstream clear-water scour depth. This study defined a dimensionless equilibrium time scale te* and evaluated its dependencies on the aforementioned parameters. Predictors for te* and the temporal downstream clear-water scour depth at submerged weirs are proposed. | |
publisher | ASCE | |
title | Temporal Evolution of Clear-Water Scour Depth at Submerged Weirs | |
type | Journal Paper | |
journal volume | 146 | |
journal issue | 3 | |
journal title | Journal of Hydraulic Engineering | |
identifier doi | 10.1061/(ASCE)HY.1943-7900.0001712 | |
page | 7 | |
tree | Journal of Hydraulic Engineering:;2020:;Volume ( 146 ):;issue: 003 | |
contenttype | Fulltext | |