Next Article in Journal
Water Table Trend—A Sustainability Status of Groundwater Development in North-West Bangladesh
Next Article in Special Issue
Effects of Temperature Change on the Soil Water Characteristic Curve and a Prediction Model for the Mu Us Bottomland, Northern China
Previous Article in Journal
The Challenges of Water Management and Governance in Cities
Previous Article in Special Issue
Risks Analysis and Response of Forecast-Based Operation for Ankang Reservoir Flood Control
Open AccessArticle

Effects of Bridge Piers on Flood Hazards: A Case Study on the Jialing River in China

State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(6), 1181; https://doi.org/10.3390/w11061181
Received: 15 May 2019 / Revised: 30 May 2019 / Accepted: 3 June 2019 / Published: 5 June 2019
(This article belongs to the Special Issue Water Related Disaster and Water Environment Management)
Bridge piers on river channels can cause obstacles for flood flow by reducing the cross-sectional area and inducing local eddy currents and high flow velocities, which may destroy hydraulic structures. A two-dimensional numerical model was used to investigate the effects of bridge piers on river flood hazards in the Jialing River, China. For the modeling, Mike 21 FM was used, which is an unstructured mesh and finite volume model that solves the shallow water equations. The numerical model was validated with collected historical flood traces, and sensitivity analyses identified the effects of the Manning coefficient and the dependence on the grid size. The influence of backwater effects on the flow field was analyzed by comparing numerical results with and without piers. The results showed that the most significant impacts were caused by the Fengxian Bridge. The maximum water level rise was about 1 m and the maximum velocity near this bridge decreased by 22.77% for a 10-year flood. We found that the top elevations of planned levees near the bridges must be increased by 0.15–0.36 m. The influence of bridge piers on the flood velocity field is more complex. These findings will help flood hazard management in this river and provides a reference for similar projects. View Full-Text
Keywords: flood hazard; Jialing River; finite volume method; shallow water equations; bridge piers flood hazard; Jialing River; finite volume method; shallow water equations; bridge piers
Show Figures

Figure 1

MDPI and ACS Style

Wang, W.; Zhou, K.; Jing, H.; Zuo, J.; Li, P.; Li, Z. Effects of Bridge Piers on Flood Hazards: A Case Study on the Jialing River in China. Water 2019, 11, 1181.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop