What's New – Updated Swedish topsoil map

Aligned with our regular update schedule, we have just updated our Sweden computation with new data, including fresh elevation and land cover data. As part of this update we have made changes in the way we map the soiltypes from the SGU Jordarter to our own topsoil classes. These topsoil classes are used in the Flash Flood Map with infiltration and runoff, and in Core+ DynamicFlood.

In particular, a number of SGU classes are now mapped to slightly more conservative topsoil types, resulting in less infiltration than previously. For instance, a prominent example is morän, which previously mapped to fine sand, but is now mapped to coarse clay with sand.  We also found some implementation issues in our previous mapping which resulted in some soil types not being mapped according to the specification, this has now been corrected.  The change will impact all new workspaces created after the update, existing workspaces are not affected.

Remember, you can always see what topsoil classes are used in new workspaces, and nationally, by enabling the "Topsoil" layer inside Scalgo Live. You can also change infiltration parameters both for DynamicFlood and for the Flash Flood Map if you want to use a different setup than the default. 

The complete mapping from SGU Jordarter to our topsoil classes is available in the Sweden documentation.

Updates to Horton parameters in Core+ DynamicFlood

In tandem with this release, we are also updating some Horton infiltration parameters in DynamicFlood, for all countries. In particular, low compaction sandy soils, gravel and rocks and boulders have been updated to better align with other guidelines. This update is not expected to cause significant changes to simulation results. The new parameters will be applied to all new workspaces created after the update. This change has been recorded in the DynamicFlood changelog.