Green Roof Stormwater Performance in Puerto Rico: An Overview of the Effect in Greening The Old San Juan Area
Zusammenfassung
The lack of information about green
roof stormwater discharge in subtropical scenarios
make it difficult for engineer to use this technique
for storm water mitigation in Puerto Rico. It has
been proven by physical data collection and
mathematical modeling that green roof can
attenuate 75% of the roof peak discharge and can
reduce 20% to 35% of the annual discharge
volume. This paper also present the correct Curve
Number values for green roof in Puerto Rico.
In addition to presenting experimental values, an
evaluation was carryout of the effect cause by
greening 100% of the Old Town of San Juan. The
total roof area for the analysis was around 70 acres
an only 4” of growing media depth was considered.
Result showed a stormwater discharge reduction of
25% and a average peak reduction of 8cfs of the
Old Town Discharge.
Key Terms — Curve Number, Green Roofs
hydrology, Greening Old San Juan or Stormwater.