Oh, the water, the water!

The data is out, the challenge has started..

Hackaton rule number 1: Allow yourself a headstart by carefully lurking for any signs. Will you crack the enigma of the flyer's cryptic clues?

Source: Toulouse DataViz

Well now, the good folks over at Toulouse Dataviz, they've really gone and done it this time. They've put together a whole mess of datasets to commemorate that doozy of a flood back in (eighteen)'75 the one that just about tore the heart right out of this town. 200 souls lost, 25,000 left without a roof over their heads. To them, it was the end of times, I tell you.

But the previous generations had the wisdom to set up a system for monitoring the waterways and rainfall. For more than a century, thousands of little hands have recorded this data, day after day, come what may. Rain, wind or snow, they spared no effort to keep a record of nature's caprices.

This data is now available here in various formats, so that everyone can dive into this story of water and resilience - it's all there to remind us that this river has always been a force that is both beneficent and destructive.

Hydrometric stations:
    * Historical records of 132 hydrometric stations, including details like station name, river, opening/closing dates, coordinates, and more.
    Time series data on water levels during 9 major flood events from 1857 to 2022.
    * Time series data on water discharge during 5 major flood events from 1905 to 2022.
    * A long-term, high-resolution (hourly, 30-minute, 15-minute, 5-minute) water level series for the Toulouse Pont-Neuf station dating back 160 years.

Precipitation:
    * Rainfall data from meteorological stations, collected around the time of each major flood event.

Terrain Elevation:
    * High-resolution elevation data for a 100-meter buffer around the Garonne River basin.
    * Detailed elevation data focused specifically on the Saint-Cyprien neighborhood of Toulouse.

Make no mistake, friend, that river, she's a wild one. A force of nature that can give life one moment and take it away the next. But with all this information at our fingertips, maybe, just maybe, we can start to tame her a little. Learn her ways, predict her moods, and keep the heartbreak at bay when she decides to flex her muscles again.

It's a tall order, I know. But hey, if those folks back in the day could do it, with nothing but pens and papers, then by golly, we've got a fighting chance. So let's roll up our sleeves and get to work, shall we? The Garonne's got a story to tell, and it's high time we listened.

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Hackaviz 2025 github repo.

Datasets are available here.

Rules and presentation of the challenge are available here.

In short:

• You can use any tools
• No obligation to use all the available data.
• Aside from external map tile layers, candidates are not authorized to use any other data than the provided one but it's authorized to perform any type of calculation on the provided datasets.
• The submission format for static visuals is PDF. In the case of an interactive data visualization, the submission will contain the URL and the deliverable must not exceed the equivalent of 2 A4 pages or the equivalent of 3 screenshots.

(Cover picture: Pont d'Empalot, Inondations de 1875 by Eugène Trutat)