Design Hyetograph Generator – SCS‑style & Triangular

Generates synthetic design storms from total depth and duration, using SCS‑style front / back‑loaded patterns (via Beta‑type shapes) or a simple triangular / Chicago‑style storm with user‑defined peak time. Units: rainfall in mm, intensity in mm/hr (and in/hr for reference).

1. Inputs Storm Depth, Duration & Pattern

Provide storm depth, duration and time‑step, then choose a pattern. SCS‑style options are smooth synthetic distributions that mimic front‑loaded / balanced / back‑loaded storms (not official NRCS tables).
Areal‑average storm depth over the catchment. You can obtain this from your IDF / rainfall tools.
Total storm duration to be represented by the hyetograph.
The tool will adjust D slightly if D is not an exact multiple of Δt (rounded to nearest number of steps).
SCS‑style patterns are generated from Beta‑type shapes. Triangular pattern is a simple ramp up/down storm.
Stored in exports and summary only; does not affect calculations.