Estimating Stormwater Infiltration and Canopy Interception for Street Tree Pits in Manhattan, New York

Estimates of the amount stormwater captured by urban trees have focused on rainfall intercepted leaves and branches, while runoff that flows into a tree pit from surrounding sidewalk has not been well quantified. This study estimated infiltrates first calculating tributary drainage area drains to street pits varying widths slopes. With Manhattan, New York, as case study, used i-Tree software find for in infiltration greatly exceeded canopy interception, ratio 3 1: averaged 6842 L/yr, interception 2228 L/yr. The results contradict prior research asserted is primary means which provide control. also provides method calculate areas would improve estimates trees, highlighting dominant role played Infiltration 4221 L/yr width m 14774 10 m. 5607 slope 0.5% 18,383 10%.