河南农业大学学报2024，Vol.58Issue(4)：644-653,10.DOI:10.16445/j.cnki.1000-2340.20240023.003
基于InVEST模型的河南省农田氮素面源污染时空模拟
Spatiotemporal simulation of nitrogen non-point source pollution in Henan Province based on In VEST model
摘要
Abstract
[Objective]The objective of this study is to simulate nitrogen non-point source pollution in farmland,unraveling its spatio-temporal distribution characteristics and influencing factors.The ulti-mate aim is to enable efficient control of non-point source pollution and foster agricultural ecological protection.[Method]The research meticulously categorizes land use units in Henan Province,consid-ering factors like agricultural zoning,terrain,planting patterns,cropping systems,and land cover.Le-veraging the In VEST model,a temporal and spatial simulation of nitrogen non-point source pollution in farmland across Henan Province is conducted for the years 2000,2010,and 2020.The analysis then extends to both output loads and influencing factors.[Result]The total nitrogen output load and nitro-gen emission intensity in the majority of cities within Henan Province exhibited a consistent pattern,characterized by an initial increase followed by a subsequent decrease.Notable disparities were evident among different cities,with Nanyang,Xinyang,and Zhumadian identified as regions manifesting high nitrogen emission intensity.A significant correlation was established between nitrogen output intensity and several factors including average nitrogen application,digital elevation model(DEM),rainfall,proportion of farmland,and slope.Partial correlation analysis underscored a close association between nitrogen output intensity,nitrogen application per site,and rainfall.The outcomes of nitrogen emission intensity classification delineated specific medium and high-intensity emission zones within the cities of Nanyang,Xinyang,and Zhumadian.[Conclusion]The identification of regions with high emission in-tensity in farmland non-point source pollution within Henan Province,alongside the influential factors discovered,offers critical insights to enhance strategies for preventing and controlling nitrogen non-point source pollution in these areas.关键词
农田氮素/面源污染/InVEST模型/偏相关分析/强度分级Key words
nitrogen in farmland/non-point source pollution/InVEST model/partial correlation ana-lysis/strength classification分类
资源环境引用本文复制引用
于滢,陈伟强,郭宇龙,姬广兴,陈轶楠,盛思雨,邓亚茹..基于InVEST模型的河南省农田氮素面源污染时空模拟[J].河南农业大学学报,2024,58(4):644-653,10.基金项目
国家重点研发计划项目(2021YFD1700900) （2021YFD1700900）
