Study on the Separate Characteristics of Oil Spill Driven by Combined Water and Wind in Braided Rivers

Jie Mu,Xiaoqing Liu,Haijun Yu,Hongbin Zhang,Chao Ma,Binbin Wu,Ruozhu Shen

doi:10.1051/matecconf/201824601118

Abstract

In general, there are many bifurcations in natural rivers. When the oil spilled accident occurred at the upstream of bifurcation and was not controlled in time, the pollution scale would be expanded and the treatment would become harder as the oil slick entered into braided river driven by combined water and wind. To Study the separate law at the bifurcation in rivers, a two-dimensional numerical simulation model of oil spilled was established by oil particle model theory on the basis of two-dimensional hydrodynamic model. The quantitative relationship between the oil separate ratio and the flux ratio, velocity ratio, width ratio was obtained driven by water. The wind effect on the proportion of oil separate was also discussed based on the oil spilled numerical simulation. This study will provide technical support for forecast and response of oil pollution in braided rivers.

Highlights

The simulation model of sudden oil spill pollution incident is an important content of oil slick emergency control and disposal system construction
The earliest proposed oil slick center-of-gravity trajectory combined with the oil slick expansion empirical formula method, the equivalent ellipse of the oil spill area is given by extending the empirical formula, and the oil pollution range is obtained after being added to the oil-oil center drift position
In China, relevant scholars (Jiang, 2007; Zhang, et al, 2010; Zhao, et al, 2012) take the tidal reach of huangpu river, the Yangtze river, the han river and the Three-Gorges reservoir as examples, and use the oil particle model to carry out the oil spill numerical simulation study of sudden oil spill accident, and the research results lay a foundation for the emergency response and disposal of oil spill pollution in multiple types of waters

Summary

Introduction

The simulation model of sudden oil spill pollution incident is an important content of oil slick emergency control and disposal system construction. In China, relevant scholars (Jiang, 2007; Zhang, et al, 2010; Zhao, et al, 2012) take the tidal reach of huangpu river, the Yangtze river, the han river and the Three-Gorges reservoir as examples, and use the oil particle model to carry out the oil spill numerical simulation study of sudden oil spill accident, and the research results lay a foundation for the emergency response and disposal of oil spill pollution in multiple types of waters. The paper has developed the study on the separate characteristics of oil spill driven by combined water and wind in braided rivers. The research results are expected to provide technical support for the prediction of the impact range of oil spills in the braided river and the disposal of oil pollution

Two-Dimensional flow equation

Setting of research object and simulation parameter

The influence of oil slick expansion time on the oil separate ratio

Study on the separate characteristics of oil driven by water flow

Conclusion