Simulation of Accidental Water Pollution in Da’ning Reservoir of Beijing South-to-North Water Diversion Project Based on Mike21FM
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
There is risk of accidental water pollution caused by traffic accidents near the tail of Da’ning reservoir, which is located near the traffic node. In this paper, the leakage of 5 tons of nitrobenzene was used as an example and five scenarios considering the effects of wind and reservoir regulation were developed to investigate the dispersion characteristics of pollutants based on MIKE21FM. The results showed that: (1) the differences of pollutant dispersion speed and overstandard water area were significant under different scenarios. The reservoir water was almost static and the pollutant dispersion speed was the slowest under the scenario without wind speed and reservoir regulation, while the pollutant speed was the highest under the scenario that the northwest wind speed was 12.3 m/s and the conveyance water rate from the reservoir to Da’ning surge pool was 20 m3/s; (2) compared with reservoir regulation, wind speed and direction had higher impacts on the pollutant dispersion. Northwest wind was better for pollutant dispersion than northeast wind when both wind speeds were equal; and (3) the emergency response time for leakage of 5 tons of nitrobenzene was more than 15 hours under normal conditions (wind speed was no more than 2.56 m/s and conveyance water rate was no more than 20 m3/s), while for the emergency response time was about 4 to 9 hours under the worst conditions (northwest wind was 12.3 m/s and conveyance water rate was 20 m3/s). The results suggested that the traffic management near the tail of the reservoir needs to be strengthened and the bridge parapets should be reinforced in order to reduce the traffic accident probability, and an automatic monitoring station near the trail of reservoir may be better constructed besides the other monitoring stations determined by the former planning.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2025 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号