By default the calculation now considers the flow detention effect of upstream transport processes by considering the design runoff transport time (Svenskt vatten, 2016).

The runoff transport time is calculated automatically from input transport distance and velocities in the box Design flow. However, another value can be used as input in the box Flow detention.
If the value “0” is used it results in that the flow detention effect of the upstream transport processes is disregarded, which was the case before this update.