BlueM.Wave 1.6.2 released

BlueM.Wave v1.6.2 has been released!

Here are some of the most notable changes and improvements:

Improved handling of error values

Here is a breakdown of how BlueM.Wave now deals with error values:

  • “NaN” and unreadable (i.e. non-number) values in time series files are converted to nodes with NaN values during import (this is written to the log when it occurs)
  • NaN values are normally not visible in the chart, in fact, they are omitted from the time series that is passed to the charting component. This means that line graphs connect across any time periods that have NaN values.
  • There is now a new button that allows you to visualize NaN values by coloring time periods containing NaN values with a color band of the same color as the series (see screenshot below).
    Note: The color bands are drawn for all currently active time series, so if multiple time series containing NaN values are active when you press the button, you may get overlapping color bands.
  • Pressing the button again removes all color bands from the chart.
Visualizing NaN values
Visualizing NaN values

Also noteworthy is that some time series formats use certain numbers to represent error values. BlueM.Wave automatically converts these values to NaN during import. Currently, this is implemented for the following time series formats:

  • UVF format: error value -777
  • ZRXP format: the error value specified as “RINVAL” in the file header (usually also -777)

Of course, it is still possible to handle any other, user-specified error values in a time series by pressing the button “Convert error values”. Unlike in previous versions, this feature now converts the specified values to NaN instead of completely removing them, so that they can still be visualized as described above and will also be included when exporting the time series.

Improved integration with TALSIM-NG

As most of the recent developments have been sponsored by SYDRO, BlueM.Wave has naturally also improved its ability to handle time series managed by TALSIM-NG, SYDRO’s river basin and reservoir simulation model.

It is a bit of a hidden feature, and of course only really useful for TALSIM-NG users: when you select a simulation result or one or even multiple time series in TALSIM-NG and then press Ctrl+C, information about the time series is copied to the clipboard. If you then press Ctrl+V in BlueM.Wave, this clipboard content is parsed and the previously selected time series are loaded into BlueM.Wave.

BlueM.Wave even takes care of unzipping simulation results from WLZIP files if necessary.

Full changelog

Many more new features, bug fixes and small improvements have been added since the last release, so here is the full changelog:


  • Added rudimentry support for storing an “Interpretation” property for time series.
    Interpretation is currently only known for series read from WEL files and the TALSIM clipboard, all other series have a default interpretation value of 99 (Undefined).
    Series with interpretation 2 (BlockRight), 3 (BlockLeft) and 5 (CumulativePerTimestep) are displayed as (inverted) stairs in the chart, all others are displayed normally (linear interpolation between nodes).
  • Added a button for auto-adjusting the Y-axes to the current viewport
    (currently only works for left and right, but not custom axes)
  • Added support for reading Q_Strg.dat files in HYDRO_AS-2D version 5 format (previous versions still supported)
  • Added read support for PRMS output files (annual and monthly summaries, as well as DPOUT)
  • Added write support for ZRXP format
  • Added write support for UVF format
  • Added write support for SYDRO binary format (BIN) (only in x86 version)
  • Added a button for visualizing NaN values of the currently active series
    This also causes the time periods consisting of NaN values to be written to the log.
  • Added metadata handling for time series, metadata is displayed in the series properties dialog
  • Implemented reading and writing of metadata for file formats UVF and ZRXP
  • Added a dialog for editing metadata before export
  • Added a new analysis function “Cumulative” which converts a time series to cumulative values
  • Added the possibility of specifying custom import settings in Wave project files (*.wvp) (#720)
  • Added a button and a dialog for merging time series (#719)
  • Added a dialog for specifying a reference date (beginning of simulation) when importing HYDRO_AS-2D files
  • The Open File menu now includes a list of recently used files (not stored across sessions)
  • Added write support for the SYDRO binary format (BIN) (only in x86 version)
  • Added a button for changing the time step of a time series (#717) (only in x86 version)
  • Added the ability to process more clipboard contents from TALSIM
    (including BIN files and multiple files/series at once) (#695)
  • Added the ability to extract WEL files from WLZIP files of the same name


  • The “Enter time series” dialog has been improved, unparseable values are now converted to NaN instead of causing an abort of the import.
  • The “Remove error values” function has been changed to “Convert error values” and now converts user-specified error values to NaN
  • When importing time series from SMUSI REG format, the title is taken from the first line of the file, before any comma


  • The Reload from Files command now respects the previously made series selection for each file
  • Imported files are no longer kept as file objects in memory (should lead to less memory usage)
  • ZRXP format: the time part of the timestamp is now optional (00:00:00 assumed if missing)
  • ZRXP format: values equal to the error value specified as “RINVAL” in the file header are converted to NaN during import
  • UVF format: fixed reading and writing of time series starting before 1900
  • UVF format: values equal to -777 are recognized as error values and converted to NaN during import
  • BIN format: values equal to -9999.999 are recognized as error values and converted to NaN during import
  • Fixed export to SMUSI REG format. Time series must be equidistant with 5 minute time step (use the new “Change timestep” function if necessary).


  • The function TimeSeries.getCleanZRE() has been replaced with two separate functions: Timeseries.removeNaNValues() and Timeseries.convertErrorValues()


  • When saving a chart to the native TEN format of TeeChart, any NaN values contained in the series are lost (i.e. the nodes with the NaN values are omitted from the series).

Download the new version from our download page.

Feedback is welcome!

– The BlueM Dev Team

BlueM.Wave v1.6.1 released

BlueM.Wave v1.6.1 has been released!


It’s been more than a year since the release of v1.6 and quite a few additions, changes and improvements have been made to BlueM.Wave.


New features and improvements

  • Added support for loading and saving Wave project files (*.wvp) (#705)
  • Added a button for displaying time series properties in a table view (#711)
  • Added the ability to load TALSIM simulation results using the clipboard (by pressing Ctrl+V) (#695)
  • Added an “AnnualStatistics” analysis function which calculates statistics such as min, max, avg and volume of a time series for each hydrological year
  • The “Comparison” analysis function now fits a simple linear regression line to the data (using the Math.NET Numerics library)
  • The analysis function “Histogram” now allows the user to specify the bins (#397). Also, the histogram result data is now written to the log.
  • The analysis function “MonthlyStatistics” now writes the result data to the log
  • Added a button for removing user-specified error values from series
  • Added a button for renaming series
  • Added a dropdown button for zooming to a specific series
  • Added support for exporting series to CSV format (#318)
  • Added support for importing files in the ZRXP format (*.zrx)
  • GoodnessOfFit” (GoF) analysis function:
    • Added “Logarithmic Nash-Sutcliffe Efficiency” as a new GoF parameter
    • The GoF parameters can now optionally be calculated for individual hydrological years
  • Added support for importing BW_TMP.DAT result files from HYDRO_AS-2D


  • Error values in time series such as e.g. -777 and -9999 are now imported and displayed as regular values. Previously, when importing from BIN and DWD-T-L format, these would be replaced with NaN. The new “Remove error values” function can be used to remove these error values, if desired. (#693)
  • Analysis “GoodnessOfFit“: Volume error is based on actual volume integrated over time if the time series unit ends with “/s”
  • Removed support for the DWD-T-L format
  • If a time series contains duplicate nodes, the duplicate nodes are now simply discarded and a warning is written to the log instead of aborting the import


  • The decimal mark selector in the import series dialog now actually works (#351)
  • Comparison” analysis function: changed the result series to a point series because a line series in TeeChart automatically sorts itself by the x-values and thus connects the points in the wrong order (not time-based)


Download the new version from our download page.

Feedback is welcome!

– The BlueM Dev Team

BlueM.Opt v1.6 released

BlueM.Opt v1.6 has been released!


The main change is the complete translation of the interface to English. Also, most of the documentation in the BlueM wiki has been translated to English.  Furthermore, Talsim-NG has been added as a new simulation engine.


  • New
    • Added support for the simulation engine Talsim-NG (© SYDRO Consult GmbH). Talsim-NG engine v3.0.1.6 is included.
  • Changed
    • Translated the main GUI and all messages related to PES (Parametric Evolution Strategy), SensiPlot (Sensitivity Analysis) and Talsim-NG to English.
    • Updated BlueM.Wave to v1.6
  • Fixed
    • When displaying the decision space as a scatterplot matrix and not selecting all optimization parameters for display, any selected solutions were being displayed incorrectly.
  • Removed
    • Dropped support for the objective function “IHA-Analysis”, IHA-Software no longer included.


Download the new version from our download page.

Feedback is welcome!

– The BlueM Dev Team

Current status and further development

BlueM is gaining more momentum. And more interest. The BlueM Development Team has been asked to present the current status of BlueM and it’s further development both at the “DAWAKO 2017” at Technische Universität Darmstadt and the “German Day of Hydrology 2017” at Trier University.

Current status

One of the major advantages of BlueM.Sim is it’s modular structure and the outer time loop, making the implementation of new modules relatively easy and straightforward. Currently implemented modules comprise natural catchment parts (including detailed SWAT modeling and diffuse pollution); lakes, ponds, and reservoirs (including complex management schemes); and river segments (including structured cross sections, flood routing and water quality processes).
Urban structures like urban catchment parts, sewers, combined sewer overflows and waster water treatment plants have been coupled via OpenMI so far.

BlueM.Sim is tightly coupled to BlueM.Wave for time series management and BlueM.Opt for multi-objective optimization tasks. BlueM.Wave is able to import and export a wide range of different time series formats whereas BlueM.Opt is equipped with several interfaces to interact with other simulation software.

Coupling of BlueM.Opt, BlueM.Sim, BlueM.Wave and interfaces.
Coupling of BlueM.Opt, BlueM.Sim, BlueM.Wave and interfaces.

Given it’s wide range of functionalities, users of BlueM.Sim, BlueM.Wave and BlueM.Opt range from research institutions over government institutions to private companies. For example, the hydrological model core of BlueM.Sim forms the base of simulation-based analysis and planning methodology of the German Federal State of Hesse to identify critical impacts on receiving water bodies from the identification of critical impacts due to waste water discharges. For further application examples of BlueM please refer to our application page.

BlueM Users
BlueM Users

For further information about the current status of BlueM please refer to the wiki or one of our recent (German) publications:

Further Development

Aside from regular bug fixes and enhancements, recent development has been focused on BlueM.Wave, where many new functionalities have been released in version 1.6.

Currently, we are working on the direct integration of urban modules into the BlueM.Sim model core. While discharge routines have already been implemented and are currently being tested and validated, the development focus is now on implementing water quality routines as well, also for more stagnant water bodies like slow flowing river stretches above weirs, lakes and reservoirs.

Further emphasis will be put on the capabilities of BlueM for immission based modeling together  with respective post processing and evaluation procedures.

Stay tuned…

– The BlueM Dev Team

BlueM.Wave v1.6 released

BlueM.Wave v1.6 has been released!

BlueM.Wave v1.6
BlueM.Wave v1.6

New features and improvement

  • New file formats supported for importing time series
  • Improvements to the user interface
    • Most of the interface and the log output has been translated to English
    • Significantly improved possibilities for viewing and navigating time series
      • New toolbar buttons for zooming, panning, zoom-undo and zoom-all
      • Start and end date for display can be set using date/time pickers
      • Display range can be set to exact date/time ranges using a simple interface
      • Buttons for navigating in time using at user-specified time increment
      • All changes to the viewport are recorded in a history that can be undone
  • Switched to .NET Framework 3.5
  • Cleanup and removing old, unused code.

Known issues

  • A 64-bit version is not available at the moment.
  • The zoom undo button is still a bit finicky, sometimes you have to press it several times to achieve the desired result.

Download the new version from our download page.

Feedback is welcome!

– The BlueM Dev Team

BlueM poster contribution at TdH 2016

Michael Kissel was asked to present the blueprint for a direct integration of urban drainage modules into BlueM at the “Tag der Hydrologie 2016/Day of Hydrology 2016” held in Koblenz, Germany. The overall topic of the conference was “Water resources – connecting knowledge in river basins”. BlueM, with its integrated model approach and the planned development was a perfect contribution to this topic.

Poster contribution to TdH 2016.
Poster contribution to TdH 2016.

You can access a PDF version of the presented poster from our publications list.

– The BlueM Dev Team

BlueM – New site & management!

We are happy to welcome you to the new BlueM website. Together with the new website we have made some fundamental changes in the management of BlueM which will allow us to focus much better on the development of the different parts of BlueM. More information will follow on this blog… stay tuned.

– The BlueM Dev Team