Understanding changes in flood magnitude and timing

C Wasko, R Nathan, M Peel, L Stein, D O'Shea - 2022 - meetingorganizer.copernicus.org
2022meetingorganizer.copernicus.org
Small shifts in the climate can have large consequences on flood timing and magnitude. For
example, changes of only 1-2 degrees Celsius and 10–20% in annual precipitation can
cause order of magnitude changes in flooding. Changes in flood magnitude and timing can
affect flood risk, farming productivity, the health of ecological systems, and impact water
supply reliability.Here we examine changes in both flood magnitude and timing across the
world with a focus on Mediterranean and semi-arid climates, such as those in south-west …
Small shifts in the climate can have large consequences on flood timing and magnitude. For example, changes of only 1-2 degrees Celsius and 10–20% in annual precipitation can cause order of magnitude changes in flooding. Changes in flood magnitude and timing can affect flood risk, farming productivity, the health of ecological systems, and impact water supply reliability.
Here we examine changes in both flood magnitude and timing across the world with a focus on Mediterranean and semi-arid climates, such as those in south-west Australia, which are dominated by dry summers and wet winters. Relative to other climates across the world, we find semi-arid regions are particularly susceptible to drying antecedent moisture conditions, with the largest decrease in antecedent soil moisture of any climate zone across the world.
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