自然资源学报 ›› 2020, Vol. 35 ›› Issue (12): 3018-3028.doi: 10.31497/zrzyxb.20201216

• 其他研究论文 • 上一篇    下一篇

深圳湾流域面源与截排溢流污染特征及其对水环境的影响

罗欢(), 陈秀洪, 吴琼, 罗娜, 黄徐   

  1. 珠江水利委员会珠江水利科学研究院,广州 510635
  • 收稿日期:2019-05-14 修回日期:2019-10-10 出版日期:2020-12-28 发布日期:2020-12-18
  • 作者简介:罗欢(1983- ),男,江西吉安人,硕士,高级工程师,主要从事水生态和水环境治理研究。E-mail: 120456750@qq.com
  • 基金资助:
    深圳市水务科技创新项目(深水务)([2017]27号);广东省重点领域研发计划项目(2019B110205004);国家自然科学基金项目(51679252)

Spatio-temporal characteristics of non-point source and sewer overflow pollution and its impacts on water environment in Shenzhen Bay Basin

LUO Huan(), CHEN Xiu-hong, WU Qiong, LUO Na, HUANG Xu   

  1. Pearl River Hydraulic Research Institute, Pearl River Water Resources Commission, Guangzhou 510635, China
  • Received:2019-05-14 Revised:2019-10-10 Online:2020-12-28 Published:2020-12-18

摘要:

随着点源污染逐步得到有效控制,面源与截排溢流污染对水环境的胁迫日益突出。基于土地遥感数据、城市排水管网等资料,构建流域—海湾一体化水环境模型,探讨深圳湾流域面源与截排溢流污染特征及其对水环境的影响,研究表明:(1)雨季COD、NH3-N和TP单位面积面源与截排溢流污染负荷分别为17.21 t/km2与10.21 t/km2、0.17 t/km2与0.69 t/km2、0.04 t/km2与0.07 t/km2;(2)面源与截排溢流污染时间上主要集中于大雨及以上等级降水较多的5月和8月,空间上主要分布在截排工程集中、下垫面面积较大且坡度较陡的深圳河、大沙河和新洲河流域;(3)面源与截排溢流水体COD、NH3-N和TP浓度可达地表水V类标准的3.7倍、18.2倍和8.5倍;(4)雨季COD、NH3-N和TP浓度高于旱季的区域分别超过深圳湾总面积的40%、60%和65%。

关键词: 面源与截排溢流污染, 流域—海湾一体化水环境模型, 时空分布特征

Abstract:

With the effective control of point source pollution, non-point source and sewer overflow pollution becomes the main type of water pollution. Based on materials of land use, urban drainage network and so on, the basin-bay integrated water environmental model was established, and the spatio-temporal characteristics of non-point source and sewer overflow pollution in Shenzhen Bay Basin as well as its impacts on water environment were analyzed. Results showed that (1) The non-point source and sewer overflow pollution loading per unit area of COD, NH3-N and TP in rainy season was 17.21 t/km2and 10.21 t/km2, 0.17 t/km2and 0.69 t/km2, 0.04 t/km2 and 0.07 t/km2, respectively; (2) The non-point source and sewer overflow pollution was concentrated in May and August with more heavy rainfall observed in Shenzhen River Basin, Dasha River Basin and Xinzhou River Basin with larger area, steeper surface slope and more sewerage cutting projects; (3) The COD, NH3-N and TP concentrations of non-point source and sewer overflow pollution could approach 3.7, 18.2 and 8.5 times the values of water quality standards, respectively; (4) The areas where the COD, NH3-N and TP concentrations in rainy season were higher than those in dry season exceeded 40%, 60% and 65% of the total area of Shenzhen Bay, respectively.

Key words: non-point source and sewer overflow pollution, basin-bay integrated water environmental model, spatio-temporal characteristics