Shenzhen Rainstorm Intensity

Design storm intensity from the Shenzhen piecewise formulas, per 深圳市城市规划标准与准则.

Interval Ⅰ — return period 0.25 ~ 1 yr (t 5 ~ 10 min)

Return period T (yr)

Rainfall duration t (min)

Rainfall factor A

—

Constant b

—

Exponent n

—

Intensity q

—

L/s·ha

Interval Ⅱ — return period 1 ~ 10 yr (t 5 ~ 10 min)

Return period T (yr)

Rainfall duration t (min)

Rainfall factor A

—

Constant b

—

Exponent n

—

Intensity q

—

L/s·ha

Interval Ⅰ (0.25 ~ 1 yr): A = 11.828 − 3.888·ln(T + 0.861), b = 6.045 − 1.813·ln(T + 0.001), n = 0.696 − 0.228·ln(T + 0.691).

Interval Ⅱ (1 ~ 10 yr): A = 8.788 − 0.507·ln(T − 0.71), b = 5.535 − 1.794·ln(T − 0.188), n = 0.54 − 0.059·ln(T − 0.473).

q = 167·A/(t + b)^n (L/s·ha). This table applies to the central region of Shenzhen; eastern and western regions may follow it as a reference. Source: 《深圳市城市规划标准与准则》.