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 calculated 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 rainfall water will end up based on the [[elevation model]] or a [[Water Overlay]]'s [[Surface_avg_direction_result_type_(Water_Overlay)|direction result]]. Users can influence the created [[Watersheds result type (Watershed Overlay)|watersheds]] by providing indicative [[Discharge area (Watershed Overlay)|discharge areas]], which will expand into watersheds. Moreover, a [[Direction prequel (Watershed Overlay)|direction prequel overlay]], such as a [[Rainfall (Overlay)|rainfall overlay's]] [[Surface_avg_direction_result_type_(Water_Overlay)|surface avg direction result]] can be used to calculate more realistic watersheds.
__NOTOC__


==Modules==
==Usage==
The watershed overlay results can be used to:
* Debug a water system; are the [[Water_level_area_(Water_Overlay)|water areas]] used to initialize my [[Water Overlay|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 rainfall 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 {{software}}, 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 they are 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|water connection generator]] tool has been added to generate culverts on a large scale based on input parameters;
 
==Module==
A Watershed Overlay can be configured by opening the Watershed Overlay Wizard.
A Watershed Overlay can be configured by opening the Watershed Overlay Wizard.
{{Template:Watershed_Module_buttons}}


{{Template:Watershed_Module_buttons}}
==Result types==
The watershed overlay can provide the following result types:
{{result types|suppresscategory=true|allowselflinks=true|
  {{:Watersheds result type (Watershed Overlay)}}
  {{:Discharge areas result type (Watershed Overlay)}}
  {{:Direction result type (Watershed Overlay)}}
  {{:Base types result type (Watershed Overlay)}}
}}
 
<ul>
<li style = "display:inline-block">[[File:Watershed_Overlay.png|200xpx]]</li>
<li style = "display:inline-block">[[File:Discharge_areas_result.jpg|200xpx]]</li>
<li style = "display:inline-block">[[File:Direction result type (Watershed Overlay).jpeg|200xpx]]</li>
<li style = "display:inline-block">[[File:Watershed_base_types.jpeg|200xpx]]</li>
</ul>


==How-to's==
==Demo projects==
* [[FAQ (Heat Overlay)|FAQ for Watershed Overlay]]
* The project Demo Watershed can be explored to see how a Watershed Overlay based on a [[Rainfall (Overlay)|Rainfall Overlay]] can contribute to debugging a watersystem.
* [[How-to add and remove an overlay|Add and remove an overlay]]
* [[How-to edit an overlay legend|Edit an overlay legend]]


{{Template:Overlay nav}}
{{Article end
|howtos=
* [[FAQ (Watershed Overlay)|FAQ for Watershed Overlay]]
* [[How to add and remove an Overlay]]
* [[How to edit an overlay legend|Edit an overlay legend]]
}}
{{WatershedOverlay result nav}}
{{Overlay nav}}
[[Category:Overlays with result types]]

Latest revision as of 13:41, 2 February 2024

Example of the Watershed overlay

The watershed overlay calculates where surface rainfall water will end up based on the elevation model or a Water Overlay's direction result. Users can influence the created watersheds by providing indicative discharge areas, which will expand into watersheds. Moreover, a direction prequel overlay, such as a rainfall overlay's surface avg direction result can be used to calculate more realistic watersheds.


Usage

The watershed overlay results can be used 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 rainfall 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 Platform, 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 they are 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 generate culverts on a large scale based on input parameters;

Module

A Watershed Overlay can be configured by opening the Watershed Overlay Wizard.

Benchmarks button.png
Watershed wiki2.png
Watershed Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
Benchmarks


Result types

The watershed overlay can provide the following result types:

Icon Result type Unit Mode Description
Overlay icon watershed watershed areas.png WATERSHEDS Integer The integer ID of the calculated watershed. NO_DATA if no watershed area was calculated for that particular cell.
Overlay icon watershed discharge areas.png DISCHARGE_AREAS Integer The initial Discharge Areas and propagated to water cells by neighbors and culvert-connections.
Overlay icon watershed direction.png DIRECTION geo angle (0-360°) The direction to which rain water would flow.
Overlay icon watershed base types.png BASE_TYPES Nominal Categorization of the individual cells based on how they are processed by the watershed model, displaying which cells are considered to be specific features.
  • Watershed Overlay.png
  • Discharge areas result.jpg
  • Direction result type (Watershed Overlay).jpeg
  • Watershed base types.jpeg

Demo projects

  • The project Demo Watershed can be explored to see how a Watershed Overlay based on a Rainfall Overlay can contribute to debugging a watersystem.

How-to's

Watershed Module
Benchmarks button.png
Watershed wiki2.png
Watershed Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
Benchmarks
Group
Result types
Base types • Direction • Discharge areas • Watersheds
Related
Result type • Model attributes


Overlays
Categorization
Grid • Parent • Result Child • Result Parent • Result type
Default
City
Administrative
Ownership • Ownership Grid • Zipcodes • Zoning • Neighborhoods • Municipalities • Vacancy
Environmental
Heat Stress • Traffic Density • Traffic Noise • Traffic NO2 • Livability • Aerius
Water
Rainfall • Flooding • Groundwater • Subsidence • Watershed • Waterwijzer
Raster Calculation
Average • Combo • Distance • Sight Distance • Travel Distance
Geo Data
Area • Attribute • GeoTIFF • WCS • WMS • Image
Topography
Digital Surface Model • Digital Terrain Model • Underground • Function • Source
Network
Network Distance • Network Overview • Network Ownership
Retrieved from "https://support.tygron.com/w/index.php?title=Watershed_Overlay&oldid=59058"