基于一维河网模型的崇明岛水环境容量计算
Water Environmental Capacity in Shanghai Chongming Island Based on One-Dimensional River Network Model
乔欢 1贾文飞2
作者信息
- 1. 上海云瀚科技股份有限公司,上海 200235
- 2. 上海普适导航科技股份有限公司,上海 201702
- 折叠
摘要
平原河网地区的水环境治理修复是一项艰巨复杂的综合系统工程,合理计算水体的水环境容量,对于确定水环境综合治理工程的规模尤为重要.以上海市崇明岛为研究区,通过构建一维水动力水质模型,基于模型模拟结果计算了研究区内各河段不同时期的水环境容量,分析了各河段水环境容量的时间变化趋势,结果表明,不同污染因子水环境容量差异较大,其中COD的水环境容量比相应水文期NH3-N和TP的水环境容量大;不同水文期水环境容量差异也较大,即各指标在丰水期的水环境容量均大于枯水期.另外,由于水环境容量受河段长度、水质降解系数的影响,河段长度越长,水质降解系数越大的河段水环境容量越大.
Abstract
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.
关键词
一维水动力水质模型/水环境容量/感潮河网/崇明岛Key words
hydrodynamic water quality model/water environmental capacity/tidal river/Chongming Island引用本文复制引用
出版年
2024
NETL
NSTL
万方数据