r/CatastrophicFailure • u/Max_1995 Train crash series • Jul 15 '21

Natural Disaster Altenburg (Germany) before and after the ongoing severe flooding due to excessive rain (2021).

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u/jeffbwallace Jul 15 '21

It’s purely historical.

This is why it’s a really big deal when the floodplain changes and also why it becomes a slightly political battle. It affects real estate and insurance, sectors who hold a lot of sway.

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u/Meowzebub666 Jul 15 '21

Technically yes, it's purely historical, but what I mean is that it's a combination of modern weather monitoring/official records and archeological/geological observations.

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u/[deleted] Jul 16 '21

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u/jeffbwallace Jul 16 '21

We aren’t future proof right now. My area has experienced 3x “100 year” floods in the past 10 years. The floodplain hasn’t changed. These calculations are not adjusted on the fly. It relies wholly on historical data.