Sample result
This is a real check, run on a business address rather than a private home: 7700 boulevard Décarie, Montréal, beside the sunken Décarie expressway, where the rain runs off and collects. It uses the same rain-on-grid simulation and report as the $39 check.
The PDF report
The report states the water depth around the building, explains how it is measured, and distinguishes it from the deepest point anywhere in the area. It also includes the depth map, buildings, design storm and rainfall gauge, data sources and screening disclaimer.
Explore the real result
This is the live viewer every customer gets, on the sample check. Switch between 2D and 3D, press Play to watch the storm fall and drain, and change the layers. The depth at the property is in the sample PDF report above.
What the numbers mean
- Water depth around the building: nine in ten spots on the ground within 3 m of the walls stay at or below this depth during the storm. Rain collects when it is more than 5 cm.
- Where it collects: the low ground around the property where the rain gathers instead of running off.
- Street drainage: how much rainfall the municipal catch basins around the property are credited with carrying away. For now on the island of Montréal only; elsewhere no street drainage is credited, so the depths are an upper bound wherever a working drainage network would carry water away.
- Storm and animation: the design storm applied, and how the water rises and drains over the storm, shown on the map and in 3D.
Levels are elevations above sea level (CGVD2013), the datum of the official Québec maps.
FloodVerity applies a 100-year, 1-hour design storm to public terrain data over a hexagon of about 400 m around the address and simulates, with a hydrodynamic rain-on-grid model, where the rain runs and collects. River and lake flooding is not modelled. It is an indicative screening, not a hydraulic study, an insurance assessment or an official flood-zone determination.