Feasibility Study and Modeling with SWMM of Infiltration Trench System in Urban Flood Control, a Case Study in Bojnord, Iran

In the past decades, urban development and the increase of impervious surfaces have caused an increase in the volume and peak discharge of runoff along with an increase in its pollution. Bojnord is one of the cities affected by flooding. This study is an attempt to analyze the feasibility of using the infiltration trench system in some parts of Bojnord and predict its effects using SWMM. Runoff generation volume was calculated with return periods of 2, 5 and 10 years using SWMM. Then, the results were compared with two conditions using and not using infiltration the trench system and the reduced runoff generation volume was analyzed in the case using the infiltration trench system. The results of this study indicated that the reduced runoff generation volume with return periods of 2, 5 and 10 years are equal to 6.51, 6.26, and 6.18%, respectively.