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assessment of streamflow variation considering long-term land-use change in a watershed 게시글의 제목, 학술지명, 저자, 발행일, 작성내용을 보여줌
assessment of streamflow variation considering long-term land-use change in a watershed
학술지명 Korean journal of agricultural science 저자 노준우,김연수,유완식,유지수
발표일 2021-09-30

Land-use change has an important role in the hydrologic characteristics of watersheds becauseit alters various hydrologic components such as interception, infiltration, and evapotranspiration.For example, rapid urbanization in a watershed reduces infiltration rates and increases peakflow which lead to changes in the hydrologic responses. In this study, a physical hydrologicmodel the soil and water assessment tool (SWAT) was used to assess long-term continuousdaily streamflow corresponding to land-use changes that occurred in the Naesungchun riverwatershed. For a 30-year model simulation, 3 different land-use maps of the 1990s, 2000s, and2010s were used to identify the impacts of the land-use changes. Using SWAT-CUP (calibrationand uncertainty program), an automated parameter calibration tool, 23 parameters wereselected, optimized and compared with the daily streamflow data observed at the upstream,midstream and downstream locations of the watershed. The statistical indexes used forthe model calibration and validation show that the model performance is improved at thedownstream location of the Naesungchun river. The simulated streamflow in the mainstreamconsidering land-use change increases up to -2 - 30 cm compared with the results simulatedwith the single land-use map. However, the difference was not significant in the tributaries withor without the impact of land-use change

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