Modeling the erosion of reach-mode flood events in a daily time period

[Manuel]

Hello everyone,

I am currently trying to model erosion in an area affected by the flood in western Germany this July 2021. Here, over the period of a few days, the water flow of the small river Erft increased by up to ten times. The river overflowed its banks, flooding a field and flowing into a large gravel pit. Due to regressive erosion, the edge of the gravel pit was shifted back by up to a hundred meters and the field was eroded to a depth of up to 5 meters.

Does anyone have experience modeling such drastic erosion within such a short period of time in Caesar in Reach Mode? 

I'm currently a bit stuck and barely getting any erosion, even though I've tried a lot of combinations on the parameters.

I am very grateful for any help or advice!

Attached is an aerial photo of the erosion structures: https://www.zdf.de/assets/kiesgrube-erftstadt-blessem-100~1280x720?cb=1627142901187

Otherwise just google for "Erftstadt-Blessem gravel pit".

Cheers to everyone

Manuel Ehnis

manuel.ehnis(at)t-online.de

[tom.co...@gmail.com]

Hi Manuel,

Sorry for the late reply. Things that normally slow down erosion in CL are grainsize and possibly the sediment transport rule… what parameters are you using? Happy to have a look if you want to email over your files. Tom

--
You received this message because you are subscribed to the Google Groups "caesar-lisflood" group.
To unsubscribe from this group and stop receiving emails from it, send an email to caesar-lisflo...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/caesar-lisflood/98710c1d-51d8-4a53-a09e-ef76bc8c3219n%40googlegroups.com.