Water Environmental Capacity in Shanghai Chongming Island Based on One-Dimensional River Network Model
Water environmental governance and restoration in the plain river network area constitute a daunting and complex integrated system project.The rational calculation of water environmental capacity is particularly im-portant for determining the scale of comprehensive water environmental governance projects.This paper takes Chongming Island in Shanghai as the study area.By constructing a one-dimensional hydrodynamic water quality model,the water environmental capacity of different river sections in the study area at different times was calcu-lated based on the simulation results of the model.The time variation trend of water environmental capacity in each river section was analyzed.The results indicate significant differences in water environmental capacity a-mong different pollutants,with the capacity of COD being larger than that of NH3-N and TP during corresponding hydrological periods.Additionally,there are substantial differences in water environmental capacity among differ-ent hydrological periods,with the capacity during high-flow periods being greater than during low-flow periods for all indicators.Furthermore,the water environmental capacity of river sections increases with increasing length and degradation coefficient of water quality,and decreasing pollutant input.
hydrodynamic water quality modelwater environmental capacitytidal riverChongming Island
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NSTL
万方数据
