S-Risk 1.2.5

This release includes a number of fixes and some maintenance and parameter adjustments.

General fixes & changes

  • Fix for incorrect water-filled porosity in the capillary zone (θwcz):

    By default, θwcz amounts to 0.34 (FL/BRX) or 0.391 (WAL) for the "generic" soil layer type. However, for a newly created simulation – which has one “generic” standard soil layer by default – this parameter was systematically set to 0 instead of the correct default value. For all other simulations, i.e., simulations where the default “generic” soil layer has been replaced by (an)other soil layer(s), the correct (default) value for θwcz is set. Also, in simulations where a second/third/… generic soil layer has been added, the correct (default) value for θwcz will be taken.

    We have discussed this issue with the FL, BRX and WAL government. In case the involved simulation(s) is (are) resulting from a closed file, you don't have to do anything. In other cases, i.e., when you want to make re-use of an involved simulation (created before release 1.2.5), either for creating a new simulation (by using the copy function) or for doing new calculations with the respective simulation, you manually have to adjust this parameter value. How can you do this?

  • Switch to Tier 2 mode and go to the “Soil” tab;
  • Select the generic soil layer, click on the “Customize” button and modify the soil layer name;

  • Behind "θwcz (m³/m³)", enter 0.34 (FL/BRX) or 0.391 (WAL) instead of 0.

    Contact us via s-risk@spaque.be if you have further questions!

  • Changed thousands separator for numbers to space, to avoid confusion with decimal numbers.
  • Adjustments to summary report, so it will be saved correctly to PDF in Chrome.

Parameter adjustments

The Walloon government decided to change the toxicological threshold values of some default WAL chlorinated substances:

  • for hexachlorobenzene, the values for systemic threshold effects have been changed:
    • oral TDI and dermal TDU: 5.0E-5 mg/kg bw/d;
    • TCA: 2.45E-4 mg/m³;
  • for pentachlorobenzene, the TCA value for systemic threshold effects has been changed: 2.8E-3 mg/m³;
  • for 2,3,4,6 tetrachlorophenol, the TCA value for systemic threshold effects has been changed: 0.35 mg/m³.

Please, be careful when making re-use of simulations (created before release 1.2.5) containing these substances, either for creating a new simulation (by using the copy function) or for doing new calculations with the respective simulation! In both cases, you manually have to adjust this parameter value. How can you do this?

  • Switch to Tier 2 mode and go to the “Chemical” tab;
  • Select the appropriate chemical, click on the “Customize” button and modify the chemical name;
  • Go to the “Risk” tab and select the respective chemical;
  • Within the “Threshold effects – Systemic effects” panel, enter three times the appropriate value for TDI, TDU and/or TCA.