农业环境科学学报2018，Vol.37Issue(2)：294-301,8.DOI:10.11654/jaes.2017-0600
湖北省三峡库区1991—2014年农业非点源氮磷污染负荷分析
Analysis of nitrogen and phosphorus pollution loads from agricultural non-point sources in the Three Gorges Reservoir of Hubei Province from 1991 to 2014
摘要
Abstract
To study the temporal and spatial distribution characteristics of nitrogen and phosphorus pollution loads from agricultural nonpoint sources and analyze the main agricultural pollution sources and key control regions in the Three Gorges Reservoir Area(TGRA)of Hubei Province, the improved export coefficient model combined with the loss coefficient method was applied. This was based on agricultural data from 1991 to 2014 to estimate total nitrogen(TN)and total phosphorus(TP)pollution loads and emission intensities from different sources(rural life, livestock breeding, and planting)and different districts(Yiling, Zigui, Xingshan, and Badong). Spatial and temporal distribution characteristics were analyzed at the same time. The results showed that from 1991 to 2014, the annual average TN pollution load was 2 132.10 t·a-1, the annual average TP pollution load was 222.64 t·a-1, and the annual average TN emission intensities was 1.85 kg·hm-2·a-1, the annual average TP emission intensities was 0.19 kg·hm-2·a-1. Before 2006, TN and TP pollution loads reduced year by year, and then slowly increased. Compared with 1991, the annual TN pollution loads in 2014 decreased by 4.22% and the annual TP pollution loadsincreased by 12.30%.Dry land and rural population were the main sources of TN pollution loads,while dry land and pig raising were the main sources of TP pollution loads.Badong was the major source of TN and TP pollution loads spatially, followed by Yiling.Based on the spatial distribution of emission intensity,Badong had the highest emission intensity,followed by Zigui.The study found that farmland plant-ing and livestock breeding were the main sources of TN and TP pollution loads,Badong was the key control region of agricultural non-point source pollution,and prevention and control efforts for agricultural non-point source pollution at TGRA of Hubei Province are still required.关键词
农业非点源污染/输出系数模型/入河系数/总氮/总磷/时空分布Key words
agricultural non-point source pollution/export coefficient model/loss coefficient/TN/TP/spatial and temporal distribution分类
资源环境引用本文复制引用
王萌,王敬贤,刘云,李春蕾,肖文发..湖北省三峡库区1991—2014年农业非点源氮磷污染负荷分析[J].农业环境科学学报,2018,37(2):294-301,8.基金项目
2014国家气象公益行业项目(GYHY201406035) （GYHY201406035）
科技创新服务能力建设-科研基地建设-林果业生态环境功能提升协同创新中心(2011协同创新中心(市级)PXM2017_014207_000024)The Special Scientific Research Fund of Meteorological Public Welfare Profession of China(GYHY201406035) （2011协同创新中心(市级）
Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees(PXM2017_014207_000024) （PXM2017_014207_000024）
