Watershed Overlay: Difference between revisions
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[[File:Watershed_Overlay.png|thumb|420px|right|Example of the Watershed overlay]] | [[File:Watershed_Overlay.png|thumb|420px|right|Example of the Watershed overlay]] | ||
The watershed overlay calculates where surface water will end up based on the [[Terrain height|DTM]] or a [[Water Overlay|water overlay's]] [[surface direction result type (Water Overlay)|direction result]]. | The watershed overlay calculates where surface water will end up based on the [[Terrain height|DTM]] or a [[Water Overlay|water overlay's]] [[surface direction result type (Water Overlay)|direction result]]. | ||
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==Usage== | ==Usage== | ||
Revision as of 16:20, 10 June 2020
The watershed overlay calculates where surface water will end up based on the DTM or a water overlay's direction result.
Usage
The watershed overlay results can be use to:
- Debug a water system; Are the water areas used to initialize my water overlay correct or do they need adjustments
- Determine which waterways are the most important waterways in my water system, based on the size of the calculated discharge areas.
- Help solve disputes with land owners: Does rain fall on the land of a land owner end up in water ways or does it remain on land.
- Using discharge areas as input for water simulation tools outside the Tygron engine, by combining the size of the area with the amount of rainfall it receives.
Considerations
The watershed overlay calculates watershed areas based on:
- A heavy rainfall;
- Sewer is not taken into account;
- Large Forests often do not have proper discharge when not close to water ways;
- Certain computed watershed areas might not be connected to the original water system used as input, in the form as discharge areas. This in turn can help find flaws in your water system;
- Culverts are important for the connectivity of discharge areas, but often not all culverts are initially know or defined. The water connection generator tool has been added to generated culverts on a large scale based on defined input parameters;
Modules
A Watershed Overlay can be configured by opening the Watershed Overlay Wizard.
How-to's