Table 1. Parameters in SWMM

Parameter Parameter Meaning Value
N-perv Manning coefficient in impervious areas 0.01
N-perv Manning coefficient in pervious areas 0.1
D-store-imperv Depression storage in impervious areas (mm) 2
D-store-perv Depression storage in pervious areas (mm) 6
%Zero-imperv Percent of impervious area with no depression storage (%) 25
Roughness (conduit) Manning’s roughness coefficient 0.013