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http://dx.doi.org/10.15681/KSWE.2018.34.6.569

mprovement of Estimation Method of Load Capture Ratio for Design and Evaluation of Bio-retention LID Facility  

Choi, Jeonghyeon (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University)
Lee, Okjeong (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University)
Kim, Yongseok (Nakdong River Environment Research Center, National Institute of Environmental Research)
Kim, Sangdan (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University)
Publication Information
Journal of Korean Society on Water Environment / v.34, no.6, 2018 , pp. 569-578 More about this Journal
Abstract
To minimize the negative alterations in hydrologic and water quality environment in urban areas due to urbanization, Low Impact Development (LID) techniques are actively applied. In Korea, LID facilities are classified as Non-point Pollution Reduction Facilities (NPRFs), and therefore they are evaluated using the performance evaluation method for NPRFs. However, while LID facilities are generally installed in small, distributed configuration and mainly work with the infiltration process, the existing NPRFs are installed on a large scale and mainly work with the reservoir process. Therefore, some limitations are expected in assessing both facilities using the same method as they differ in properties. To solve these problems, in this study, a new method for performance evaluation was proposed with focus on bio-retention LID facilities. EPA SWMM was used to reproduce the hydrologic and water quality phenomena in study area, and SWMM-LID module used to simulate TP interception performance by installing a bio-retention cell under various conditions through long-term simulations. Finally, an empirical formula for Load Capture Ratio (LCR) was derived based on storm water interception ratio in the same form as the existing method. Using the existing formula in estimating the LCR is likely to overestimate the performance of interception for non-point pollutants in the extremely low design capacity, and also underestimate it in the moderate and high design capacity.
Keywords
Bio-retention; EPA SWMM; LID; Load Capture Ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
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