【摘要】 研究流域农业面源污染的迁移轨迹，探讨其影响因素，对于推动流域面源污染防控具有重要的理论和现实意义。分析了2013—2022年湖南省沅江流域内农业面源污染负荷的面板数据，探究其时空变化特征。结果显示：2013—2022年湖南省沅江流域内总氮、总磷污染物负荷量总体呈现下降趋势，在空间上呈现“东多西少”的格局；污染负荷强度呈递减趋势，空间上表现由东北-西南一线向两边递减的格局；污染负荷强度重心迁移轨迹总体呈V形并向东迁移。更多还原

【Abstract】 The migration trajectory of agricultural surface source pollution in watersheds and the factors influencing it are of great theoretical and practical significance. Further study of these factors would be beneficial in the prevention and control of surface source pollution in watersheds. An analysis of panel data on agricultural surface source pollution loads within the Yuanjiang River Basin in Hunan Province from 2013 to 2022 was analyzed to investigate the spatial and temporal characteristics of this phenomenon. The results demonstrate that the total nitrogen and total phosphorus pollutant loads in the Yuanjiang River Basin of Hunan Province from 2013 to 2022 exhibit a general decreasing trend, with a spatial pattern of “more in the east and less in the west”. Additionally, the intensity of pollutant loads demonstrates a decreasing trend, with a spatial decrease from a northeast-southwest line to both sides. The intensity of pollution loads is also observed to be decreasing, exhibiting a pattern of decline from the northeast to the southwest. Additionally, the migration trajectory of the center of gravity of the pollution loads is identified to be generally V-shaped, with an eastward migration.更多还原