Release notes v18.3.1
Max water velocity through ponds and wetlands. Calculation of the cross-sectional area at maximum water depth in ponds and wetlands, as well as the maximum water velocity flowing through this cross-section, compared to velocities at risk of erosion. These data are reported in Result report 4.2.
The Table Stormwater concentration (ug/l) per land use in Result Report 3.1 has been updated and does not any longer show overall standard concentrations per land use, but now calculated concentrations per land use based on specified factors for traffic intensities and density factors that increase / decrease the land use specific concentrations depending on input site-specific properties. These are those used in the pollutant calculations, as was the case earlier, but these were not previously reported per land use. If no such factors are specified in the Stormwater box, the table shows the same data as before, i.e. general standard concentrations.
Revised calculation of the total volume of underground macadam basins, where the previous parameter of design rain depth, which included the share of pores in macadam, is now replaced by a lower rain depth with a separate indication of the share of pores as input in the basin box. This gives a clearer and more accurate calculation of the total volume of the basin, which, however, becomes the same as before at a share of pore of 0.33 (default value in the box). The equation presented at the value in the flowchart has also been revised to contain this input share of pores (porosity for macadam).
Revised equations for baseflow and runoff presented in the flowchart, now presenting flow in l/s and concentration in ug/l.