Input

Select Surface Grid

Select a Grid file to use for the analysis. Use the Ground Surface tool to create a grid model of the terrain. Select a grid that correlates with the desired accuracy of the output. Grid models that exceed 10 million points will slow down computation and display time.

Elevate Objects (optional)

Select objects to elevate in the grid model. Only closed polygon objects exceeding the size given under Settings will be included. All grid points inside a valid polygon will be elevated.

Add Culverts (optional)

Existing Culverts can be added to the Watershed Model. They first have to be added to the Quadri model and the selected using the "Add Culverts" function. The number of objects added will be displayed behind the function button. 

Existing Culverts can be added to the Quadri Model in several ways:

• From the "Insert" menu, select the "Import Files" tool and use any of the available formats to import data.

• From the "Modelling" menu, use the "Objects" tool to digitize objects from relevant data sources (e.g. maps)

Once the objects are linked to the Watershed model, they will carry (move) all accumulated water from the culverts starting point to the culverts end point.

Note: Make sure the culverts starting point is located inside the grid holding the accumulated water. Especially when using small grid cells, consider creating additional culvert objects from neighboring grid cells to capture all the water to pass through a culvert. 

Run

Generates the first part of the Watershed Model by calculating Fillsink and Flow Accumulation values. The output will display an Elevation Map and highlight cells that have been manipulated with Fillsink calculations.