Add Groundwater Signatures Module

[raoulcollenteur]

Short Description

Introducing the groundwater signatures module to characterise groundwater time series. For more information see Issue #370. The PR includes over 30 signatures that are currently implemented, documented, and tested for minimal functioning.

Checklist before PR can be merged:

• closes [Development] Groundwater Signatures in Pastas #370
• is documented
• PEP8 compliant code
• tests added / passed
• Example Notebook (for new features)
• API changes documented in Release Notes

[martinvonk]

Cool addition :)

General question: How applicable are all the tests for different frequencies of time series? Both for time series with a large frequency (e.g. monthly) or time series with differing frequency (14D -> 1D). Anything the user should be aware of beforehand?

[raoulcollenteur]

Cool addition :)

General question: How applicable are all the tests for different frequencies of time series? Both for time series with a large frequency (e.g. monthly) or time series with differing frequency (14D -> 1D). Anything the user should be aware of beforehand?

Thanks. This is generally up to the user, although some signatures are defined for a certain frequency (for example, they use the annual or monthly mean). Heudorfer et al (2019) has a good overview table for the recommended frequencies, but I think this is still up for debate in the future.

I accidentally directed the merge PR into master, but changed it to the Dev-branch now. @martinvonk, can you re-review and approve if appropriate?
Cheers, Raoul

[martinvonk]

Looking good!