LIULi-jun,WANGTian,HOUJing-ming,et al.High-resolution Simulation of Combined Sewer Overflow and Its Surface Transport Process[J].China Water & Wastewater,2024,40(19):127-136.
High-resolution Simulation of Combined Sewer Overflow and Its Surface Transport Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第19期
Page:
127-136
Column:
Date of publication:
2024-10-01
- Keywords:
- combined sewer network; node overflow; high-resolution simulation; pollutant transport; GPU acceleration technology
- Abstract:
- To deeply comprehend the mutual feeding mechanism and transport principle of the urban combined sewer network and surface water quality during rainfall, an efficient and high-resolution water environment numerical model of hydrodynamic water quality based on the coupling of GAST and SWMM was employed to simulate and analyze the overflow volume, the overflow and backflow processes at the node of the combined sewer system, as well as the transport principle of the overflow pollutant TSS on the surface during rainfall. During the period ranging from 3 600 seconds to 21 600 seconds, the proportion of the overflow pollutant TSS exceeding 300 mg/L in the three recurrence intervals (2 years, 10 years, and 50 years) demonstrated a general downward trend. The road runoff was essentially in line with the surface transport of nodal pollutant TSS, mainly along the road direction. With the escalation of the rainfall recurrence interval, the surface overflow volume, area, as well as the concentration and load of the overflow pollutant TSS, initially increased and then decreased.
Last Update:
2024-10-01