长江科学院院报 ›› 2018, Vol. 35 ›› Issue (9): 38-42.DOI: 10.11988/ckyyb.20170362

• 水资源与环境 • 上一篇    下一篇

新沟河排江对长江水质影响风险分析

陈江海, 陈翔   

  1. 上海勘测设计研究院有限公司,上海 200434
  • 收稿日期:2017-04-01 出版日期:2018-09-01 发布日期:2018-09-18
  • 通讯作者: 陈 翔(1991-),男,江苏溧阳人,助理工程师,硕士,研究方向为水环境数值模拟。E-mail:chen_xiang@sidri.com
  • 作者简介:陈江海(1984-),男,江苏沭阳人,高级工程师,硕士,研究方向为水环境治理与水资源保护。E-mail:158440366@qq.com   
  • 基金资助:
    国家重点研发计划项目(2016YFC0401504)

Risk Analysis on the Influence of Xingou River Discharge onWater Quality of Yangtze River

CHEN Jiang-hai, CHEN Xiang   

  1. Shanghai Investigation,Design & Research Institute Co., Ltd., Shanghai 200434, China
  • Received:2017-04-01 Online:2018-09-01 Published:2018-09-18

摘要: 新沟河延伸拓浚工程实施后,入江排污负荷增加,长江水质受到影响。为掌控污染风险,保护水质安全,通过建立二维水动力水质数学模型,研究在不利条件下,排江水流对长江水质的影响。同时,长江水质不同月份的NH3-N本底浓度差异较大,导致不同月份允许排污负荷也不同,确定不同本底浓度下最大允许排江负荷具有极大的应用价值。研究结果表明:排江水流在不利条件下对长江局部水质存在较大影响,且排江NH3-N浓度越高对排江口区域长江水质影响越大。为做好水质风险防范,以邻近水源保护区为保护目标,提出对应长江不同本底状况下工程最大允许排江负荷限值。研究成果可为相关部门采取预防措施进行水质影响风险防范提供参考依据。

关键词: 新沟河排江, 水质污染风险分析, 本底浓度, 最大允许排江负荷, 数学模型

Abstract: The construction of Xingou River dredging and expanding project would affect the water quality of the Yangtze River by increasing the load of discharge. To control the risk of pollution and ensure the safety of water quality, a 2-D hydrodynamic pollutant transport model is built to examine the influence of Xingou River discharge on the water quality of Yangtze River under unfavorable conditions. Meanwhile, the background concentration of NH3-N in Yangtze River varies remarkably in different months, hence the maximum allowable discharge is also different in different months. The results show that Xingou River discharge has apparent influence on the local water quality of Yangtze River under unfavorable conditions, and a higher NH3-N concentration would exert greater influence. To prevent from the risk of water pollution and protect the nearby water source conservation district, the maximum allowable discharges in the presence of different background concentrations are given.

Key words: Xingou River discharge, risk analysis of water quality pollution, background concentration, maximum allowable discharge, numerical model

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