Input
Results
Spread T—
Flow depth at curb d—
Flow velocity v—
T vs T_max—
Method
HEC-22 Eq. 4-2: T = [Q·n / (0.376·Sx^1.67·SL^0.5)]^(1/2.67). Curb depth d = T·Sx. Flow velocity v = Q / A, where A = T·d/2.
Triangular gutter spread T per HEC-22 §4 modified Manning equation — for inlet spacing and curb spread design.
HEC-22 Eq. 4-2: T = [Q·n / (0.376·Sx^1.67·SL^0.5)]^(1/2.67). Curb depth d = T·Sx. Flow velocity v = Q / A, where A = T·d/2.