Designing on Above-Ground Stormwater Infiltration Facility

摘要

In recent years, various changes nave taken place in stormwater management design from the perspective of municipalities. Two in particular are a change in the level of treated runoff, and a shift in design from underground to above-ground infiltration facilities. The current trend in runoff levels is toward controlling only the more frequent, one-and two-year storm events, which account for about 90 percent of all such incidents. Both Delaware and Maryland have recently redone their runoff control parameters to emphasize control of these more frequent events. Since control of these events results in smaller discharges, the related flooding that occurs with control of larger storms is averted.