农业环境科学学报2024，Vol.43Issue(12)：2805-2816,12.DOI:10.11654/jaes.2024-0828
基于DPeRS模型的陕西省总氮面源污染时空特征解析
Analysis of the spatial and temporal characteristics of total nitrogen non-point source pollution in Shaanxi Province based on DPeRS model
罗仪宁 1冯爱萍 2王雪蕾 2李楠 1黄莉 2谢成玉 2朱南华诺娃 2张沛 1王晓岩1
作者信息
- 1. 陕西省环境监测中心站,陕西省环境介质痕量污染物监测预警重点实验室,西安 710054
- 2. 生态环境部卫星环境应用中心,北京 100094
- 折叠
摘要
Abstract
In order to clarify the temporal and spatial distribution characteristics,pollution types and pollution control areas of total nitrogen(TN)non-point source pollution in Shaanxi Province,diffuse pollution estimation with remote sensing(DPeRS)model was used to evaluate the temporal and spatial distribution characteristics of non-point source pollution load and pollution sources in Shaanxi Province from 2016 to 2020 by remote sensing pixel scale(30 m).This paper identifies the main types and optimal control units of non-point source pollution,and discusses the contribution rate of non-point source pollution to surface water pollution.The results show that the average discharge load of TN non-point source pollution is 1.25 t·km-2,with the amount of river entry being 8.31×104 ton in Shaanxi Province from 2016 to 2020.The discharge load of TN non-point source pollution shows a trend of first decreasing and then increasing,and the amount of river entry shows a trend of fluctuation with the interannual change.The TN non-point source pollution is relatively serious in the Yellow River basin,especially in the Weihe River basin,and the high-risk areas of entering the river are mainly distributed in the plain planting areas of the Weihe River basin.Farmland runoff is the primary type of non-point source pollution of TN in Shaanxi Province,followed by soil erosion.Among the 49 control units in Shaanxi Province,the average number of TN non-point source pollution control units is 24 from 2016 to 2020,accounting for 61.21% of the average area,and the optimal control units of Class Ⅰare mainly distributed in Weihe River basin.In addition,the average contribution rate of TN non-point source pollution to the total nitrogen of surface water quality was 46.51% in Shaanxi Province from 2017 to 2020,and the average contribution rate of agricultural sources was 41.87% .The prevention and control of TN non-point source pollution in Shaanxi province focuses on the optimal control unit of non-point source pollution in the Yellow River basin,especially the control of farmland runoff in the Weihe River basin.关键词
面源污染/DPeRS模型/遥感/陕西省/总氮Key words
non-point source pollution/DPeRS model/remote sensing/Shaanxi Province/total nitrogen分类
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罗仪宁,冯爱萍,王雪蕾,李楠,黄莉,谢成玉,朱南华诺娃,张沛,王晓岩..基于DPeRS模型的陕西省总氮面源污染时空特征解析[J].农业环境科学学报,2024,43(12):2805-2816,12.
