Control Effects Comparison of Three Kinds of Typical LID Infiltration and Emission Reduction Measures: Beijing Case Study

摘要

Low impact development (LID) stormwater management system emphasizes source control using structural and non-structural measures to achieve the objective of runoff emission reduction. Three typical LID technical measures, permeable pavement, sunken greenbelt and rain garden are evaluated on design methods, application conditions and key parameters of them. All of them are very effective for runoff volume reducing, peak rate and pollution control. Combining with the typical practices and key design parameters of three measures, hydrologic quantitative reductions evaluation including the reductions calculation in runoff volume, peak rate and the total pollutants were given, and then the cost-effectiveness assessment through the investment analysis were carried out, the control effects of them were compared through a sample project. The conclusions are valuable for urban stormwater management in Beijing and other cities in China.