s-risk's blog

S-Risk training on October 13, 2016

We will organise a next S-Risk training session on October 13, 2016. For more information on the training programme or how to register, see our Events page.

User manual updated

The S-Risk user manual has been updated to reflect the latest changes introduced with S-Risk 1.1.5. You can find English and Dutch versions on our Documents page.

Communication issues between web browser and server system

At the moment, we experience communication issues between the web browser and our server system. This may lead to timeouts in your web browser, appearing like the system is not responding or hanging. In most cases, S-Risk will work again after refreshing your browser page (using the Refresh button on your browser or the F5 key). Thank you for your patience while we search for a solution.

S-Risk updated to version 1.1.5

This morning, S-Risk has been updated to version 1.1.5. This release introduces a major overhaul of the calculation backend for applications I and III and a number of fixes and improvements in reports and user interface.

More details can be found on our Release notes page.

Substance data sheets available in English

The substance data sheets are now available in English. See our Documents page for the relevant links!

S-Risk 1.1.5

Released on June 30, 2016.

List of changes in this release

S-Risk 1.1.5 introduces the new optimization backend for applications 1 and 3, and a number of smaller fixes in the user interface.

The new optimization algorithm is a major improvement for the calculation of critical concentrations. It is better at finding the relevant critical concentrations, more capable of dealing with nontrivial RI functions and runs significantly faster than the old algorithm.

Full list of changes in this release:

  • complete overhaul of optimization backend - applications I & III are faster and more robust
  • optimization error messages and remarks have been formulated to be clearer and more user-friendly, both for the older optimization algorithm as well as the new one
  • optimization error messages and comments are now shown in the summary report, too
  • default application type for new simulations is now application II
  • numbers reported in the "exposure overview" in the in-browser report are now consistent with the extended PDF report
  • better tuning of CI & RI calculations and critical concentrations in function of enabled exposure routes
  • improved handling of route enabling/disabling: dermal exposure via water and inhalation via bathroom air are now systematically coupled
  • reports on optimization results will show warnings for metals based on non-standard models, and suggest to double check with the Graph tab
  • renamed region "Flanders" to "Flanders/Brussels", as the model and parameterization is valid for both regions
  • region indication is now prominently visible in the application page header
  • fixed situations where the summary report wouldn't show up after model calculations
  • entering 0 for soil pH, organic matter or clay percentage will raise an error message now
  • the extended & printed summary report now also include the simulation label
  • lots of smaller fixes for text labels in the user interface and reports


Released on February 2nd, 2016.

List of changes in this release

S-Risk release is a bugfix release, fixing a problem introduced with the previous 1.1.4 release.
In 1.1.4, adjustments were made to make the outdoor air model more consistent with user-provided soil air measurements (see item 2 in Model adjustments in the 1.1.4 release notes). These adjustments introduced a new problem concerning volatilization from groundwater to outdoor air, of importance to simulations where groundwater contamination is determining outdoor air concentrations and outdoor air is determining for the global risks.

S-Risk updated to 1.1.4

This morning, S-Risk has been updated to version 1.1.4. This release introduces some minor model modifications and a number of issues with the user interface.

More details can be found on our Release notes page.

S-Risk 1.1.4

Released on January 20, 2016.

List of changes in this release

S-Risk release 1.1.4 introduces minor model modifications and resolves a number of issues in the graphical user interface and the S-Risk server backend. We encourage our users to keep on reporting potential issues whenever they are encountered, via the S-Risk helpdesk at info@s-risk.be.

Model adjustments

  • the BCF model for Arsenic in spinach was slightly adjusted, as the previous model was inconsistent and caused problems with the optimizations in Applications I & III. This adjustment has been thoroughly discussed with OVAM and has a minimal effect on simulation results.
    • previous model:   log(BCF) = -3,36 - 1,1 × log(Csoil) + 0,99 x log(Ptot)
    • new model:  log(BCF) = -0.484 - 0.974 × log(Csoil)
  • the outdoor air model now consistently uses the user-provided soil air measurement value (Concentrations tab) instead of modelled soil air results.
  • indoor air concentration from volatilization is now overruled if the outdoor air concentration at child height is higher, instead of adult height

Graphical user interface improvements

  • the schematic site overview in the "Simulation summary" panel now always shows the correct groundwater depth
  • the summary report (Results tab) now indicates problematic optimization results in Applications I & III more clearly, referring to the extended report
  • the soil layer dropdown menu in the Graph tab now clearly differentiates between the different soil layers by specifying layer depth
  • consumption data for vegetables & animal products are now accessible, in the Exposure tab (Tier 2). Only applications 2 and 3 allow for editing of the consumption data.
  • fixed inconsistent behavior  of the "BCF Formulas" dialog in the Plants tab
  • Water tab parameters are not editable anymore in application I - these are considered to be part of the generic scenario
  • removing a soil layer now also adjusts the "Optimize on soil layer" setting if needed
  • improved the handling of user language settings when generating reports
  • fixed some typos & display issues in the graphical user interface

Registrations open for our upcoming S-Risk training

The registration page for our upcoming training session on February 18, 2016 is now open.

This training has been officially recognized by IBGE-BIM. More information can be found on our Events page.


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