Method for Design and Operation of Rainfall Infiltration Pond Based on Dynamic Seepage Coefficient

Abstract:

Taking the transformation of an impermeable pond in the north urban best practices area (UBPA) of Shanghai World EXPO as an example, a field infiltration study was conducted. The experiment before the engineering indicated a linear relationship between the infiltration rate and water level gap (i.e., pond water level versus groundwater table), which was further verified by the experiments within the transformed infiltration pond. With the measured dynamic infiltration rate, it is presented that adjusting the pond water level dynamically is a practical approach to enhance runoff infiltration, critical in achieving 17.6 mm UBPA runoff reuse or infiltration within three days, certified by LEED ND platinum grade.

Key words:rainfall infiltration pond; infiltration coefficient; low impact development; Leadership in Energy and Environmental Design for Neighborhood Development(LEED ND) Certification