A critical clean up is needed. Abstract has many marks for glow and grammar. This is a nice figure that will reproduce and reduce more easily if the font is changed to a san serif such as helvetica 5. The proper abbreviation for micrometers is um or mm. I arroyo channel sediment box.
Paragraph break for clarity.
Just a little bit of concluding will really help the reader follow what you are doing here. See suggestions on ms. This section needs to be much more explicit. Arrows for rates don't line up well and are unclear. This whole figure is confusing.