CAJ | 학술논문

随着点源污染的有效管理和控制，面源污染已成为水环境污染的主要因素。在G IS平台的支持下，将分布式模型SWAT模型应用于濑溪河流域（泸县境内）农村面源污染模拟研究，进行适用性评价及模拟应用分析。径流和氨氮负荷月模拟结果良好，评价指标 R2、Ens （Nash-Sutcliffe Efficiency）均在0．8以上，表明SWAT模型应用于研究区农村面源污染模拟的可适用性。结果分析表明氮磷流失受土地利用方式影响显著，营养物流失关键区分布在耕地比重高的地区；农村面源污染是导致水体富营养化的绝对因素，其贡献率高达90％；由人类生产和生活所产生的 T N和 T P污染负荷，以农业化肥所占比重最大，约为1／2，其次为畜禽养殖，约为1／3，因此农业化肥和畜禽养殖是农村面源污染控制的重点。
수착점원오염적유효관리화공제，면원오염이성위수배경오염적주요인소。재G IS평태적지지하，장분포식모형SWAT모형응용우뢰계하류역（로현경내）농촌면원오염모의연구，진행괄용성평개급모의응용분석。경류화안담부하월모의결과량호，평개지표 R2、Ens （Nash-Sutcliffe Efficiency）균재0．8이상，표명SWAT모형응용우연구구농촌면원오염모의적가괄용성。결과분석표명담린류실수토지이용방식영향현저，영양물류실관건구분포재경지비중고적지구；농촌면원오염시도치수체부영양화적절대인소，기공헌솔고체90％；유인류생산화생활소산생적 T N화 T P오염부하，이농업화비소점비중최대，약위1／2，기차위축금양식，약위1／3，인차농업화비화축금양식시농촌면원오염공제적중점。
With the effective control of point source (PS) pollution ,non-point source (NPS) pollution has become the main cause of river water quality deterioration .The objective of the study is to test the feasibility of SWAT (Soil and Water Assessment Tool) model as a simulator of nitrogen and phosphorus yields for the Laixi River Basin in Luxian County ,then identify the key sources and critical areas of nutrient loss with GIS platform .Predicted values streamflow and NH3 -N match well with the observed values dur‐ing the calibration and validation (R2 ≥0 .8 and Nash-Sutcliffe Efficiency≥0 .8) .The result shows that areas consisting in high per‐centage of farmland are critical areas of NPS pollution .NPS pollution is the absolute major cause of water contamination with the maximal contribution rate 90% .The key non-point source is fertilizer loss with contribution rate 50% ,followed by backyard live‐stock w ith 30% .