Development of a Simple Distributed Hydrologic Model for Determining Optimal Installation location and Quantifying Efficiency of LID Devices for Reducing Non-point Sources

Abstract

In this paper a simple distributed hydrologic model is proposed to determine optimal installation location of LID devices and to quantify their non-point sources reduction efficiency in urban drainage catchment. The proposed model is applied to simulate surface runoff and non-point sources loading on urban drainage based on square cells. In the model, rainfall events occurring at each cell are transformed into surface runoff events by NRCS-CN technique, and non-point sources pollutants which have been built-up at dry period are discharged at wet period by washed-off process. Since the model can represent the drainage flow path explicitly when the overland flow is occurred and moved into the next lower cell, it is possible to look at the effects of the LID facilities positioning as well as the non-point sources reducing efficiency of such facilities.

Size Determination Method of Bio-Retention Cells for Mimicking Natural Flow Duration Curves

“…본 연구에서 다루고자 하는 LID 시설은 원칙적으로 자연적 인 수문순환과정을 유지하면서 도시를 개발하고자 하는 개념 에서 도입된 것으로 (Cho et al, 2013;Lee et al, 2013) (Kim et al, 2010;Lee et al, 2012;Lee et al, 2014;Park et al, 2015 (Rossman, 2015). 지하수 유출량과 대수층에서의 지하수 수위는 아래와 같 은 식으로 모형화된다.…”