- Getting Started & Use Cases
- Ny skyfallsanalys och en ännu bättre marktäckekarta
- New land cover map for Finland
- Depths in the depression map
- New Danish land cover map with more classes
- National Swedish High-Resolution Impervious Surface Mapping
- Watershed tool updated with even better descriptions of catchment characteristics
- National Flash Flood Map with Infiltration and Drainage for Denmark
- Add your own WMS layers to SCALGO Live
- Enriched building data in Denmark
- National hydrological corrections and Land Cover for Poland
- National hydrological corrections for Norway
- Updated Impervious Surface Mapping for Denmark
- National hydrological corrections and updated local data for Finland
- Fast and intuitive tools to work with infiltration and land use
- Improvements to vector imports and exports
- National Danish groundwater model
- New Sweden high-resolution model
- New powerful depression map and more analyses visualization options
- Introducing Modelspaces: Get your hydrodynamic models into SCALGO Live
- Use case videos
- Access a EA flood maps inside SCALGO Live
- Improved map export
- New powerful ways to edit the elevation model
- Better coloring of flooding layers and sea-level depth filtering
- National Danish High-Resolution Impervious Surface Mapping
- National access for local and regional organizations
- Simpler, more powerful downloads
- Customize Layer Transparency
- Hydrological corrections and new data in Sweden
- Improved export functionality
- Access a wide range of authorative data inside SCALGO Live
- Importing VASP data
- Measure gradients, undo edits, and Norway updates
- New terrain edit features, soil balance information and much more...
- Browse historical orthophotos in SCALGO Live
- Emergency planning with sea-level rise from national forecast data
- Detailed information about watershed composition
- Better styling of imported vector layers
- New Danish Elevation Model
- Work with gradients in the profile widget
- Flood risk screening from rivers and flow paths
- New workspace tool: Raise and lower terrain uniformly
- Importing LandXML TINs, LAS point clouds
- New model in Sweden
- Side slopes on workspace features
- Drag and drop enhancements
- Swedish contour maps
- Subsurface basins and sewage drains in workspaces
- New Interface
- Volume information for watersheds and flow paths
- New powerful tool for emergency response and coastal flood prevention
- Denmark: New flash flood map
- Sweden: Geodatasamverkan setting for Swedish users
- Import custom terrain models
- New Hydrological Corrections
- Elevation contours now available
- Download orthophotos as JPEG and PNG
- Subsurface structures in workspace
- Sea-levels in terrain profiles
- Updated orthophotos
- Models and analysis update
- User interface updates
- User interface updates
- GeoDanmark/FOT data, Matrikelkortet now available
- New flash flood map
- Download of risk polygons
- Updated orthophotos
- Nationwide hydrology on the new DHM/2015 model now available
- New flash flood map computation available with watershed download
- DHM/2015 variants and sea-levels now available nationwide
- DHM/2015 now available nationwide
- Hydrology on the new DHM/2015 model now available
- New DHM/2015 Model - now with buildings
- New DHM Model
- Watershed Tool
- Ad hoc layers
- Nationwide contour maps for all countries
- User Interface
- Streams and Flow
- Country Specific
Analysis – Depression-Free Flow
This analysis shows how water flows without taking the active depressions into account. In other words, all the depressions are treated as if they have been filled. Therefore, no water can be stored in the depressions, and the water will keep flowing until it enters the sea. This type of analysis is useful when creating an overview of surface runoff in a larger area, like e.g. an entire neighbourhood or a national reserve. With Depression-free Flow, you are able to view the flow paths equivalent to the maximum topographical watershed. Select Flow Accumulation or Watersheds to use the analysis.
Flow Accumulation illustrates the directions of flow paths and show how the surface water accumulates into the sea. Contrary to flow accumulations in the flash flood analysis, this flow accumulation always visualizes the flow paths to the sea and does not take any retention in depressions into account. The direction of the flow paths can viewed by zooming in on the map (see picture below).
Slider: Adjusting the flow detail:
The flow detail slider enables you to adjust the minimum size of the flow paths. This can be beneficial if you want to eliminate very small flows, and focus on the more significant flow paths.
Point query: Querying the analysis at a point
Point query will tell you the exact watershed area for a given point on the map.
Profile: Seeing the profile of a flow path
The profile tool does not interact directly with the depression-free flow analysis, but it can be helpful to investigate the elevation across a flow path. Enable an elevation model for this to work.
Watershed tool: See the watershed of the flow paths
When using the watershed tool, you are able to view from where the surface runoff gathers in the flow path.
- Choose to see the watershed analysis Depression-free flow
- Select the flow path of which you want to see the flow path.
Now, you can see how the paths connected to the chosen path are all part of the same watershed.
You can download flow paths as line segments in the same resolution as the elevation model. This makes the data set relatively big. In order to filter which data to download, use the slider to determine the minimum size of the flow paths you want. See how to use the download tool in toolbar section.
Watersheds based on a depression-free flow analysis corresponds to the maximum topographic watershed of a river mouth or surface flow path leading to the ocean.
What are watersheds
The watershed analysis visualizes the topographic watersheds all the way to an outlet in the sea. Each colored sections illustrates a different watershed. The colors are randomly selected, and their only function is to separate the watersheds.
NOTE: if you want to know more about watersheds related to specific rain events where depressions are not assumed to be filled, see watershed (flash flood mapping).
How to use Watershed analysis
Enable ‘watersheds’ in the analysis section of the dock under Depression-free flow.
Watersheds can be downloaded as a raster where each cell contains the ID of its watersheds. It can also be downloaded as a vector where the watersheds will be represented as polygons.