San Francisquito Catchment - Observed Rainfall Example
Purpose​
This example describes the San Francisquito event-based setup used when rainfall forcing comes from observed data. It focuses on the inputs needed for event simulation and hydrograph comparison.
Case setup​
The current event simulation uses:
| Item | Value |
|---|---|
| Grid resolution | 30 m |
| Rainfall depth | 75 mm |
| Simulation duration | 48 h |
| Routing family | Local inertial |
| Outlet treatment | Perimeter outlet |
| Discharge observations in the current run | Not available |
| Comparison gauges | Generated from flow-accumulation percentiles |
The current rerun did not include a valid observed discharge file, so HydroPol2D generated comparison points from the drainage network. The page therefore documents the event setup and the model response for the present configuration.
Simulation video​
The animation below shows the 30 m event simulation. The panels show flood depth, velocity, hazard metric, and cumulative infiltration.
San Francisquito 30 m event simulation: flood depth, velocity, hazard, and cumulative infiltration.
What this example shows​
This example highlights:
- observed rainfall forcing, ideally interpolated from multiple gauges when those data are available;
- observed discharge or stage data at the comparison location;
- explicit treatment of initial conditions, especially antecedent wetness;
- careful confirmation that the observation point represents the modeled drainage area.
Summary results​
The current event simulation produced:
- a peak outlet flow of
260.57 m³/s; - a maximum flood depth of
0.31 m; - a 48 h routed response with maps saved in the same four-panel format used in the controlled example.