ScholarWorks@성균관대학교

초록

Recent climate change and urbanization have increased the uncertainty of the hydrological cycle, highlighting the importance of water budget analysis as a key tool for assessing watershed hydrological characteristics. This study focused on the advantages of observation-based water budget analysis to overcome the limitations of traditional hydrology models, which contain complex uncertainties and cannot fully reflect a watershed's actual hydrological response. We conducted a watershed-scale water budget analysis by integrating precipitation, runoff, and soil moisture with eddy covariance-based evapotranspiration data from the Ministry of Environment's flux tower network. Additionally, we applied the Budyko Framework to quantitatively evaluate long-term hydrological responses. The results showed a water balance closure error within 5-10% at the 13 observation sites, confirming the high reliability of the observational data. The Budyko analysis also demonstrated the potential to detect the effects of artificial water inputs, such as irrigation. These findings suggest that the methodology can be expanded to include other hydrological components like groundwater and snowmelt, offering a scientific basis for developing tailored water management strategies and advanced observation-based water cycle assessment systems.

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