It's time for another #TechniquesTuesday ! Today we're featuring @ErinLHarvey ...

Hi! I'm Erin, a third year PhD student at @CU_Earth studying the role of debris flows in the post-earthquake sediment cascade following the 2008 Wenchuan earthquake.

Debris flows transport a wide range of grain sizes, from clay to boulders. I am particularly interested in how the grain size distribution of debris flow deposits relates to debris flow evolution and deposition.

In October 2019, I measured the grain size of two debris flows in Wenchuan, China. The flows occurred in August 2019. I used a combination of techniques to measure everything from clays to boulders! We dug pits and used field sieving and photogrammetry to measure the large grains

…And brought back the finest sediment to sieve in the lab. I had to use a combination of wet and dry sieving in the lab to try to minimise lab delays from the pandemic!

Now, slightly behind schedule, I have grain size distributions for two debris flows. I plan to use these curves to determine how deposit grain size distributions relate to debris flow characteristics, such as runout, and deposition. Hopefully I can show you at #vEGU21 #PhDLife

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