Sed_export in SDR 3.7 is more than double what it was with 3.6

In running the new 3.7 version of SDR, the sed_export values are more than double what they were with 3.6. All the data and parameters are the same. The only thing changing is from 3.6 to 3.7. Is this all due to the change in drainage routing algorithm? Was there anything else that changed between versions? That’s a huge change in final output.


The routing is the only change between 3.6.0 and 3.7.0 that would affect the numerical outputs, specifically the included pitfilling and the replacement of d-infinity with a multiple flow-direction algorithm. I could see the MFD routing in particular accounting for a large change in sed_export in some landscapes.