农业环境科学学报2024，Vol.43Issue(12)：2765-2775,11.DOI:10.11654/jaes.2024-0913
长江中下游地区农业面源污染流失特征及风险评价
Loss characteristics and risk assessment of agricultural non-point source pollution in the middle and lower Yangtze region
摘要
Abstract
In order to explore characteristics of agricultural non-point source pollution in the middle and lower Yangtze region,the diffuse pollution estimation with remote sensing model(DPeRS)was used to calculate agricultural non-point source pollution loads in this study.And pollution risk assessment method considering pollution thresholds was developed to identify high risk area of agricultural non-point source pollution.Furthermore,the influencing factors of agricultural non-point source pollution were analyzed.In 2023,the total nitrogen and phosphorus loads of agricultural non-point sources pollution in the middle and lower Yangtze region were 10.70 kg·hm-2 and 0.50 kg·hm-2,respectively.And the high agricultural non-point source pollution areas were mainly distributed in Hunan,Hubei,Jiangxi and Jiangsu provinces.The proportions of agricultural non-point source pollution with slight,mild,moderate,strong,severe and extremely severe pollution risks were 30.33%,43.66%,15.96%,4.70%,2.25% and 3.10%,respectively.The statistical analysis showed that precipitation and fractional vegetation cover were key influencing factors of agricultural non-point source pollution.The correlation coefficients between precipitation and agricultural non-point source total nitrogen load in Anhui,Hunan and Jiangsu provinces were higher than 0.18(P<0.05),and the correlation coefficient between fractional vegetation cover and agricultural non-point source total phosphorus load in Jiangxi Province was-0.21(P<0.01).Results indicate that high-intensity agricultural activities and high precipitation increase the pollution risk of agricultural non-point source pollution in the middle and lower Yangtze region.The combination of agricultural non-point source pollution loads and water pollution thresholds can improve the accurate identification of high risk areas and provide valuable information for formulating effective agricultural non-point source pollution management strategies.关键词
农业面源污染/DPeRS模型/污染风险/遥感/长江中下游Key words
agricultural non-point sources pollution/DPeRS model/pollution risk/remote sensing/middle and lower Yangtze region分类
资源环境引用本文复制引用
郝新,高吉喜,谢成玉,黄莉,王雪蕾,逯颖..长江中下游地区农业面源污染流失特征及风险评价[J].农业环境科学学报,2024,43(12):2765-2775,11.基金项目
国家自然科学基金联合基金项目(U23A2015)Joint Funds of the National Natural Science Foundation of China(U23A2015) （U23A2015）
