Changelogs » Hydpy



*HydPy* informs the user when trying to read missing or incomplete observed or simulated time series data into *Node* objects. Due to some recent changes, this feature became unreliable. Version 3.1.1 fixes this problem and adds explanations and tests to the online documentation, to (hopefully) prevent this from happening again.


*HydPy* now checks for missing values in e. g. meteorological input time series data.  This behaviour can be enabled/disabled by setting option *checkseries* to True/False.

Additionally, XML file implementations of the XML schema file *config.xsd* are now easier to maintain regarding version changes and general options like *checkseries*.


From now on, installing `matplotlib` is not required for using (most features of) `HydPy` anymore.


For convenience, XML namespaces are now valid download links, and some name discrepancies result in warnings only instead of errors.


One can now manually define the name and style of log files when executing workflows based on XML configuration files.

From now on, version specific XML schema files will be part of each new HydPy release, making referencing them more comfortable.

These changes do not fix actual bugs but simplify coupling with Delft-FEWS.


Read from and write into flat archives, e.g. `LahnHBV/conditions/` instead of  `LahnHBV/conditions/`.

This change does not fix an actual bug but simplifies coupling with Delft-FEWS.


hstream_v1` calculated `nan` values for some configurations.  This should now be fixed.

We now perform proper integration testing for `hstream_v1`, so that this problem should not recur.


Major improvements:
* automatic writing of averaged time series (see module  "variabletools")
* reading and writing of NetCDF files (see module "netcdftools")
* configuration of workflows with XML files (see module "xmltools")
* command line support (see module "")
* interoperability with Delf-FEWS
* simplified installation using "pip" on 64-bit Windows
* runnable on Python 3.6 and 3.7 (but not on Python 2.7 anymore)
* Windows based testing on AppVeyor


Some of the more important features currently under development:

* Temporal smoothing of potential evaporation for HydPy-L-Land.
* Allow negative discharge of HydPy-L-Land for subbasins with large water areas under dry conditions (optionally).
* Add the `RestrictTargetedRelease` option to HydPy-D.
* Improve some error handling functionalities.


Major fixes:
* Method `save_allseries` of class `Nodes` does now work properly.
* Method `init_models` can now handle the case of missing control files.

Minor fixes:
* The handling of missing directories should now be more consistent.


Major fixes:

* The calculated meltwater of the glacier itself was overwritten by the meltwater of its covering snow layer.  We fixed this error.

Minor fixes:

* The adaption of precipitation and potential evaporation to altitude cannot result in negative values anymore.


Major fixes:

* When implementing the two additional water area types SEE and FLUSS into HydPy-L-Land, an error had crept in the calculation of direct discharge from sealed surfaces (VERS).  This error is now fixed.

Minor fixes:

* Some information on the status of different methods for handling time series data had been printed on the screen multiple times.  This error is now fixed.


At the framework level, HydPy should now be stable enough for a first release.

The same is true for most of the implemented models.  But note the following points:

* HydPy-L-Stream (version 1) has a problem with preserving the water balance; we might change this soon.
* HydPy-L-Land now no offers two additional water area types (SEE and FLUSS).  These are intended to be an improvement over the old water area type (WASSER) but are still a little experimental.
* HydPy-D is newly implemented and thus also still a little experimental.  You can use it, but be aware some of its functionalities might change soon.

Windows users often have problems with installing HydPy due to Visual Studio compiler issues.  If you want to implement your own models into HydPy, you will have to select and install the proper Visual Studio compiler.  But if you only want to apply the available models, this is not necessary.  Then just download the matching "" file (which includes the precompiled binaries), unzip it, and store the "hydpy" folder in your site-packages directory.  If everything works well, the automatic "testing and recompiling" mechanism of HydPy should not be triggered when importing any model.