摘要
通过三峡库区兰陵溪小流域农业面源污染的实地调查,采用排污系数法和等标负荷法对其农业面源污染排放特征进行估算。结果表明,2018年兰陵溪小流域农业面源污染COD、TN、TP排放量分别为118.64、99.31、10.08 t/a。种植业源TN、TP排放量分别为89.77、9.05 t/a,其中以茶-果间作的排放量最大,其次为茶园、果园、农田。畜禽养殖业源COD、TN、TP排放量分别为85.61、4.26、0.66 t/a,以役用牛养殖的污染物排放量最高,其次为蛋鸡、生猪。农村生活源COD、TN、TP排放量分别为33.03、5.27、0.37 t/a。各种污染物中,TN等标排放量最大(49.65 m^(3)/a),是兰陵溪小流域的主要污染物,主要来自种植业源;COD等标排放量最小(2.97 m^(3)/a),主要来自畜禽养殖业源。种植业源、畜禽养殖业源及农村生活源的等标负荷比分别为86.74%、7.61%、5.65%,种植业源是兰陵溪小流域的主要污染源。未来兰陵溪小流域农业面源污染防控应以种植业为主,主要防控污染物为TN。
This study estimated the characteristics of agricultural non-point source pollution in the Lanlingxi small watershed through investigation,the pollutant emission was calculated by using the discharge coefficient method and the equal-load method.The results showed that the total emissions of the COD,TN and TP from non-point sources pollution in Lanlingxi in 2018 was 118.64,99.31,10.08 t/a,respectively.From the planting industry source,the total emissions of TN and TP were 89.77,9.05 t/a,among which the tea-fruit intercropping mode had the largest emission,followed by the tea garden,orchards and farmland.From the livestock breeding source,the emissions of COD,TN and TP were 85.61,4.26 and 0.66 t/a.The highest emissions were from cattles,followed by egg-fowls and live pigs.From the rural life sources,the emissions of COD,TN and TP were 33.03,5.27 and 0.37 t/a.In all kinds of pollutants,the equal-standard emission of TN was the largest(49.65 m^(3)/a),which mainly from the planting industry source.And the equal-standard emission of COD was the smallest(2.97 m^(3)/a),mainly from the livestock breeding source.The standard load ratios of planting,livestock breeding and rural life sources were 86.74%,7.61%and 5.65%,respectively.Agricultural non-point source pollution in the Lanlingxi small watershed was dominated by planting industry.In the future,the pollution prevention and control should focus on planting industry,and the main pollutant of TN should be controlled particularly.
作者
胡文杰
王晓荣
付甜
唐万鹏
崔鸿侠
潘磊
徐燕
HU Wenjie;WANG Xiaorong;FU Tian;TANG Wanpeng;CUI Hongxia;PAN Lei;XU Yan(Hubei Academy of Forestry,Wuhan Hubei 430075;Zigui Forestry Science and Technology Promotion Center,Yichang Hubei 443600)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第5期568-573,共6页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2017YFC050530304、No.2017YFC050530602)。
关键词
农业面源污染
排放量
等标污染负荷
兰陵溪小流域
agricultural non-point source pollution
emission
equal-standard pollution load
Lanlingxi small watershed
