ground- water, geo- statistics, environmental- engineering, earth- science

Local Water News – Extreme Events!

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The Stuttgarter Zeitung recently published two articles related to water:

  • The first article describes the flood-protection measures for a part of the city of Tübingen. The city council just agreed to start building a dam in 2010. This dam will be able to stand in a flood with a 20-year return period.

    A normally relatively small creek, the “Goldersbach“, has lead in the past after extreme precipitation events to extensive flooding and related destruction. The dam is part of a multiple-level protection strategy, which is outlined in this publication. The dam is a good thing, however it won’t withstand any substantial floods, that is floods bigger than with a 20-year return period. This is why the warning time is critical for the citizens living in the area! The article states that the warning time is five hours. It would be interesting to get to know details on how they estimate five hours as the warning time. Measurements have to be made, submitted, and calculations and predictions have to be made, involving fair amounts of uncertainty.

  • The second article describes how NASA researchers found out while working with GRACE data that groundwater levels are declining in India since 2002, even though the precipitation patterns have been fairly normal.

These are two practical examples that illustrate how extreme events are critical and need special attention!

Written by Claus

August 31st, 2009 at 8:37 am

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