Development an operational system for the forecasting of bridge pier scour depth
Journal
Scour and Erosion IX - Proceedings of the 9th International Conference on Scour and Erosion, ICSE 2018
Pages
707-711
Date Issued
2019
Author(s)
Abstract
In recent years, climate change is significantly happened to affect weather system on earth. Extreme weather and floods occur frequently in recent years due to climate change around the world. Therefore, the hydrological condition and hydrographic characteristics of rivers are directly affected by climate change. In addition, affecting the erosional depth of bridge pier and river bed stabilization include many factors such as hydrological and hydrographic characteristics in a river basin, the scouring and silting of river bed section near the bridge pier, the bridge pier geometry and the protection works of bridge pier foundations. Therefore, the main purpose of this research is developing a friendly operational system to estimate bridge pier scour depth variation during typhoon and flood event in Taiwan. The development of friendly operational system is necessary to estimate bridge pier scour depth for bridge safety issues. In this study, based on the rainfall intensity data during typhoon event and the flood discharge calculation in a river basin, we develop an effective and low-cost forecasting system for the estimation of bridge pier scour depth. It can provide decision support information such as bridge pier scour depth, the variation of flood elevation, early warning of bridge closure and opening for traffic transportation. The Zhuoshui River Basin is selected as the study area in this research. The friendly operational system includes rainfall runoff model, one-dimensional and two-dimensional numerical model, and the applicability of local scour formulas are included in this research. The friendly operational system carries out the simulation results of flood events that includes the elevation changes of river bed erosion near the specified bridge pier and the erosional depth around bridge piers. Then, the estimated results of bridge pier scour depth using local scour formulas at specific bridge pier are compared in this research. In addition, the friendly operational system is developed on easy operation and several allocated functions, the functions can support users to calibrate and verify numerical model and select target bridge to estimate scour depth through the interface. To achieve the forecasting of the erosional depth at specific bridge piers in Zhuoshui River, the system can also connect the rainfall runoff forecast system in the future. We hope the established friendly operational system can provide references for the management unit of bridge, such as estimating the risk of bridge piers damage during flood events and the early warning of bridge transportation. © 2019 Taylor & Francis Group, London.
SDGs
Other Subjects
Bridge piers; Climate change; Decision support systems; Earth (planet); Erosion; Floods; Forecasting; Hurricanes; Numerical models; Rain; Risk perception; Rivers; Runoff; Watersheds; Decision supports; Hydrological condition; Operational systems; Rainfall intensity; Rainfall-runoff forecast; Rainfall-runoff modeling; Traffic transportations; Two dimensional numerical models; Scour
Type
conference paper