Urban areas in watersheds increase the impervious surface, and agricultural areas deteriorate the water quality of rivers due to the use of fertilizers. As such, anthropogenic land use affects the type, intensity and quantity of land use and is closely related to the amount of substances and nutrients discharged to nearby streams. Riparian vegetation reduce the concentration of pollutants entering the watershed and mitigate the negative impacts of land use on rivers. This study analyzes the data through correlation analysis and regression analysis through point data measured twice a year in spring and autumn in 21 selected damaged tributary rivers within the Han River area, and then uses a structural equation model to determine the area land use. In the negative impact on water quality, the mitigation effect of riparian vegetation was estimated. As a result of the correlation analysis, the correlation between the agricultural area and water quality was stronger than that of the urban area, and the area ratio of riparian vegetation showed a negative correlation with water quality. As a result of the regression analysis, it was found that agricultural areas had a negative effect on water quality in all models, but the results were not statistically significant in the case of urban areas. As a result of the model estimated through the structural equation, BOD, COD, TN, and TP showed a mitigation effect due to the accumulation effect of river water quality through riparian vegetation in agricultural areas, but the effect of riparian vegetation through riparian vegetation was found in urban areas. There was no These results were interpreted as having a fairly low distribution rate in urban areas, and in the case of the study area, there was no impact due to riparian forests due to the form of scattered and distributed settlements rather than high-density urbanized areas. The results of this study were judged to be unreasonable to generalize by analyzing the rivers where most of the agricultural areas are distributed, and a follow-up to establish a structural equation model by expanding the watershed variables in urban areas and encompassing the variables of various factors affecting water quality research is required.

Abstract
서 론
연구 방 법
    1. 연구 대상 유역
    2. 데이터 및 분석 방법
연구 결 과 및 고 찰
    1. 기초 통계량
    2. 상관관계 분석
    3. 회귀 분석
    4. 유역 도시지역 비율, 농업지역 비율, 100 m 수변림 비율과수질의 구조적 관계
결 론
REFERENCES

• 권현일(건국대학교 산림조경학과) | Hyeonil Kwon (Department of Forestry and Landscape Architechure, Konkuk University)
• 이종원(건국대학교 산림조경학과) | Jong-Won Lee (Department of Forestry and Landscape Architechure, Konkuk University)
• 이상우(건국대학교 산림조경학과) | Sang Woo Lee (Department of Forestry and Landscape Architechure, Konkuk University) Corresponding author