Development and application evaluation of baseflow separation/pollution load estimation tool considering the characteristics of the recession by flow condition-specific

초록

This study introduces the WAPLE4 system, developed to accurately separate direct runoff and baseflow and calculate pollution loads while considering the recession characteristics of hydrographs under varying flow condition-specific. The system was applied to four major watersheds in South Korea, demonstrating improved accuracy in baseflow separation, with an average baseflow reduction of 7 % when the beta parameter by flow condition-specific was applied. Furthermore, pollution load analysis revealed reductions in TP and TN loads by 10.92 % and 10.56 %, underscoring the effectiveness of this parameter in refining pollution load estimates. These findings highlight the system's ability to improve flow condition-specific baseflow and pollutant load calculations while reflecting the distinct characteristics of individual watersheds. By enabling precise quantification of pollutant loads from both direct runoff and baseflow, this system can be effectively utilized to provide foundational data for the development of more comprehensive watershed management strategies and aid decisionmakers in addressing water quality challenges more effectively.

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