Prerequisites

To build a model in Hydrata you need three input data sets:

Input	Required	Format	Notes
Elevation data	Yes	GeoTIFF (.tif)	Must be in a projected coordinate system
Inflow data	Yes	Drawn in interface	Rainfall polygons or surface flow lines
Boundary data	Yes	Drawn in interface	External boundary lines around the domain

You will also need to decide on:

• Model resolution — the mesh triangle size in metres
• Duration — how long the simulation should run (in seconds)

Tutorial elevation data

For this tutorial, you can download a sample elevation file:

Download tutorial DEM (Grand Canyon 1m)

This is a 1m resolution GeoTIFF covering a small area suitable for a quick test run.