Raoul Collenteur

Too often, I see people talk about a replication as if the first study has established something, and the replication study is a double-check. What people often fail to understand is that we do not do replication studies to *check* a finding, but to *establish* a finding. 1/x

Hydrology Paper of the Day @hydrologywsl.bsky.social on drought phenomena in Switzerland: drought in the Alps and an understanding of return intervals; SPEI mapping of drought intensity; comparison of drought scenarios; and how a national drought early warning system will assist drought management.

Machine-Learning-Aided Forecasting of Drought-Related Extremes (MaLeFiX) Climate change exacerbates drought-related extremes, with significant ecological, economic, and human health impacts. MaLeFiX project is developing an interdisciplinary platform that will provide comp...

💧 Discover more about how the MaLeFiX project is working to anticipate & #mitigate the impacts of drought-related #extremes – helping Switzerland to achieve a more resilient, and less uncertain, future. 👇

🔗 www.wsl.ch/en/projects/...

#ClimateChange #Water #Biodiversity

Totally! It also makes reviewing more difficult in some cases when you want to know what was actually done

A story of how science is helping the public, what started as a scientific endeavor is now providing Switzerland with real-time information and forecasts about droughts. #hydrology #drought.

8. Mai 2025 11:00

drought.ch ist nun vollständig umgesetzt.

2010: Beginn der Forschungsarbeiten
2013: Forschungsplattform geht Online
Mai 2022: Der Bund will vor #Trockenheit warnen
Mai 2025: Der Bund warnt vor Trockenheit

auf drought.ch werdet ihr nun auf die Seite des Bundes umgeleitet.

We have built a global dataset of observed groundwater time series combined with lots of relevant Earth system variables. Check out Annemarie's poster this morning at #EGU25 A.59 and ask her about all the effort that went into data cleaning!

meetingorganizer.copernicus.org/EGU25/EGU25-...

Quantification and Analysis of Hydrograph Behavior Using Groundwater Signatures The study of hydraulic head changes over time is a common task for groundwater hydrologists. Groundwater signatures are numerical metrics, or statistical aggregates, that quantify the behavior observ....

A link to the paper is probably helpful too😅 ngwa.onlinelibrary.wiley.com/doi/full/10....

In our recent paper, we introduce the new #Pastas groundwater signatures module to characterize the behavior observed in groundwater level time series. This concept is well known in streamflow hydrology, but less in groundwater #hydrology. We describe new opportunities to use in groundwater studies.

Great example of why we need data sharing and how it improves the data! Share, evaluate, improve, share again, everyone wins :)

Auf dem Weg einer nationalen Warnplattform für Trockenheit.

Forschungsprozess und politischer Prozess.

Publikation mit @dirknkarger.bsky.social und Fabia Hüsler (BAFU) aud der @extremeswsl.bsky.social Forum für Wissen @wslresearch.bsky.social

www.dora.lib4ri.ch/wsl/islandor...

Thanks for sharing ! We also applied the temperature index model into our lumped groundwater model and got good results for Davos (CH) with very similar parameter values (T=0, k=3.25). This study will help us to set default initial parameters for the snowmelt models for our software / users :)

Flood Warning Systems - The Next Generation Groundwater Rising · Episode

Today's commuter Podcast tip: Project Groundwater on groundwater flood forecasting with Dr. MacKay from the BGS, fun to listen to! open.spotify.com/episode/33jz...

Thanks for sharing, great tool indeed!

Interesting ideas to improve reproducibility of scientific studies, I wonder how to ensure that the notebooks will still run in 10, 20, or 30 years time, or if a time limit is required? Even a 10-year guaranteed repro would be a massive step forwards!

Dataviz of changes in Swiss temperatures using a mountainous landscape

Beautiful visualisation of changes in Swiss temperatures since 1864

www.meteoschweiz.admin.ch/ueber-uns/me...

Graphic by Simon Scherrer

The force of Forchheimer – the contributions of Philipp Forchheimer to groundwater hydrology Philipp Forchheimer must be considered one of the most important founding fathers of modern geohydrology. Connected to his name are the Forchheimer law, which describes non-Darcian flow in porous m...

I wanted to read this promising history article tonight, but I don't have access (seriously!?!). I totally forgot there was this thing called not-open-access 2025. Now I'm sad. 2025, scientific publishing is still broken :(

www.tandfonline.com/doi/full/10....

Understanding groundwater droughts using long-term data and time series modelling: www.cambridge.org/core/journal...

Interesting assessment of the quality of some hydrological models. It relates well to my earlier comment on Python packages for hydrology, where quality (and maintenance) is a clear issue that needs to be addressed (which probably equals more funding needed for research software development 😅)

Excellent work @reinecke.bsky.social, interesting read ! I hope this will motivate others across our field to improve the quality of our software :)

Happy to be informed about new Python packages, PRs even more 😀

GitHub - raoulcollenteur/Python-Hydrology-Tools: This repository holds a list of open source Python packages interesting to Hydrologists :droplet: This repository holds a list of open source Python packages interesting to Hydrologists - GitHub - raoulcollenteur/Python-Hydrology-Tools: This repository holds a list of open source Pyt...

Time to share the updated version of my attempt to list open-source Python packages for hydrology: github.com/raoulcollent... . I automated checking the quality and updates of packages. Quick take-away: many usefull packages available, but long-term maintenance is challenging.

Thanks for the list! Happy to be added :)

Exploring the power of data-driven models for groundwater system conceptualization: a case study of the Grazer Feld Aquifer, Austria - Hydrogeology Journal Developing a reliable conceptual model is crucial for analyzing groundwater systems. An essential part of the aquifer conceptualization is the identification of the hydrological stresses that control ...

New study led by Ainur Kokimova on exploring the use of data-driven models to find important stresses before making a numerical groundwater model: link.springer.com/article/10.1...

PyEt v1.3.1: a Python package for the estimation of potential evapotranspiration Abstract. Evapotranspiration (ET) is a crucial flux of the hydrological water balance, commonly estimated using (semi-)empirical formulas. The estimated flux may strongly depend on the formula used, a...

In need to estimate evaporation? Check out PyEt, a Python package that includes ~20 methods, depending on the available input data (T, H, ..). We hope to make it easier to test methods, include uncertainty, & correct for CO2 effects when making CC projections: gmd.copernicus.org/articles/17/...

Urban Surfing Unique ideas for activating waterways

Hydrology Paper of the Day
@hiddenhydrology
on urban surfing: where civil engineering intersects with surface water sports; a geography of locations involving rivers, canals, and civil engineering structures; wave pool design; and the story of waterways in historical context.

Join us!
#Postdoc #position in #Groundwater #Ecology, Biogeography & #Biodiversity @ Uni Zurich/Eawag (2 yrs)

Analysing genetic, functional & organismal diversity of groundwater #amphipods (Amphiwell.CH), building on extensive dataset & own field/lab work

apply:
apply.refline.ch/673277/1173/...

Data-driven modeling of hydraulic head time series: results and lessons learned from the 2022 groundwater modeling challenge Abstract. This paper presents the results of the 2022 groundwater time series modeling challenge, where 15 teams from different institutes applied various data-driven models to simulate hydraulic head...

Looking for a model to simulate hydraulic head time series? Checkout the results of the 2022 groundwater modeling challenge in our new preprint in HESS! hess.copernicus.org/preprints/he...
#Hydrology

Happy to share and receive feedback on this preprint in GMD about our Python package to estimate pot. evaporation with ~20 different methods: gmd.copernicus.org/preprints/gm...

Anyone wants to do some MSc. thesis work on modelling this data with Pastas?! Very exciting dataset to try and analyze using time series models I think! I'd be happy to co-supervise!