Urbanization can be significantly affected the hydrologic cycle by increasing flood discharge and heat flux. In order to mitigate these modifications in urban areas, Low Impact Development (LID) technique has been designed and applied in Korea. In order to estimate runoff reduction rate using SWMM LID model, the characteristics of five LID techniques was firstly analyzed for water balance. Vegetated swale and green roof were not reduce flood discharge nor infiltration amount. On the other hand, porous pavement and infiltration trench were captured by infiltration function. The flood reduction rate with LID is substantially affected by their structures and properties, e.g., the percentage of the area installed with LID components and the percentage of the drainage area of the LID components.

Abstract
 1. 서 론
 2. 연구 방법
  2.1. LID요소기술
  2.2. SWMM의 LID적용방법
 3. 결과 및 고찰
  3.1. 연구대상지 개요
  3.2. LID기술의 물수지 분석
  3.3. LID기술의 적용
 REFERENCE

• 강승희(강원대학교 방재전문대학원) | Sung-Hee Kang (Graduate school of disaster reduction technology, Kangwon Nat'l Uni.)
• 허우명(강원대학교 환경해양건설공학과) | Woo-Myung Heo (Dept. of Envir. and Ocean Const. Eng., Kangwon Nat'l Uni)
• 강상혁(ECOSTAR LTD.) | Sang-Hyeok Kang Corresponding author