Study on the Effect of LID-type Road Greenbelt to Mitigate Urban Water-logging

摘要

It is important to mitigate urban water-logging because it has become a kind of urban disease that often occurs in many cities in China. This paper proposes a new approach to control urban water-logging by building the LID-type road greenbelt, a sunken greenbelt along city roads. Three field grasslands were selected to test their infiltration capacities. The possible reduction in runoff volume was calculated for the scenario when the proposed LID-type road greenbelt is applied to all of roads in Xiamen island. The study results indicate that the mean value of steady infiltration capacity of these test grasslands is 2.61 mm/min. The calculated reduction in runoff volume is about 8.86 million m~3 for the storm of 15th-16th May, 2013 that caused a serious water-logging problem in Xiamen island. The study result proves that the LID-type road greenbelt may have a great potential to mitigate urban water-logging.