文献类型：期刊文献

中文题名：广州不同地表下垫面对暴雨径流PAHs含量的影响特征

英文题名：The Influence Characteristics of the Polycyclic Aromatic Hydrocarbons(PAHs) Content of Rainstorm Runoff in Different Surface in Guangzhou City

作者：吴巧花[1] 陈步峰[1] 裴男才[1] 史欣[1]

第一作者：吴巧花

机构：[1]中国林业科学研究院热带林业研究所

年份：2018

卷号：27

期号：4

起止页码：736-743

中文期刊名：生态环境学报

外文期刊名：Ecology and Environmental Sciences

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金项目(31770492);广东珠江三角洲森林生态系统国家定位观测研究站运行补助项目(2017-LYPT-DW-129);广州市城市森林生态系统效益监测;分析与研究(2016-2019)

语种：中文

中文关键词：多环芳烃;暴雨;地表径流;污染;森林生态系统

外文关键词：PAHs;rainstorm;surface runoff;environmental pollution;forest ecosystem

分类号：X144

摘要：城市频发暴雨过程中,地表径流携带大量有机污染物进入水体,对水环境质量影响极其显著。以广州市帽峰山的水文试验场为基础,对比观测了林区3种下垫面类型(草地、水泥、沥青)的暴雨径流,及2种森林生态系统暴雨水文过程中有机污染物多环芳烃(PAHs)的含量特征,解析不同地表下垫面及森林生态系统对暴雨产流PAHs含量的影响。结果表明,(1)市区及林区10次暴雨∑16PAHs的平均质量浓度分别为126.1、112.7ng·L^(-1),市区暴雨中PAHs较林区高13.4ng·L^(-1)。(2)不同地表垫面径流中PAHs的污染负荷为沥青地表>水泥地表>草地地表,与林区暴雨中∑16PAHs相比,草地及水泥地表垫面分别表征出32%、13%的滤除效应,沥青地表垫面表征出111%的增加效应。(3)相对林区暴雨,阔叶林、杉阔混交林两种森林生态系统总径流∑16PAHs质量浓度分别下降了45.43、69.64ng·L^(-1),滤除效应分别达到40%、58%。阔叶林林冠层吸附了暴雨中14%的∑16PAHs,其地表层向径流中贡献了17%的∑16PAHs;杉阔混交林地表径流∑16PAHs浓度较暴雨低32%。本研究反映出广州市植被下垫面可有效滤除暴雨有机污染物,结果可为珠三角以及其他城市的生态环境保护提供依据。
In the process of frequent rainstorm in cities,the surface runoff carries a large amount of organic pollutants into the water body,which has a significant impact on water quality.Based on the hydrology experiment site at the Maofengshan forest park located at Guangzhou City,south China,the characteristic of PAHs in three types of urban underlying surface storm runoff(grassland,cement,asphalt)and in the hydrologic process of rainstorm of two forest ecosystems were analyzed,to explore the influence of different underlying surface and forest ecosystems on PAHs content of rainstorm runoff.The results showed that:(1)The ten rainstorm average mass concentration ofΣ16 PAHs in urban and forest areas was 126.1,112.7 ng·L-1,the urban area was 13.4 ng·L-1 higher than the forest;(2)The pollution load of PAHs in different surface turned out asphalt>cement>grassland.Compared toΣ16 PAHs concentration in forest rainstorm,the grassland and cement surface showed 32%and 13%filtering effect,while the asphalt surface showed 111%increasing effect;(3)Compared toΣ16 PAHs concentration in forest rainstorm,the broadleaved forest and the mixed forest ecosystems(Chinese fir and broadleaved forest)total runoff decreased 45.43,69.64 ng·L-1,and showed 40%and 58%filtering effect.The broad leaved forest canopy adsorbed 14%PAHs in rainstorm,and its surface contributed 17%to runoff;theΣ16 PAHs in surface of Chinese fir and broad leaved forest is 32%higher than rainstorm.This study indicated that typical vegetations in the Maofengshan forest park could filter the organic pollutants(like PAHs)in rainstorm,which provided the basis for the ecological protection and could be referred by cities in the Pearl River Delta and adjacent regions.