Sub-watersheds in SDR model

Hi all,

Is it possible, in the SDR model, to subdivise watershed to sub-watersheds without point of measurement of sediment, and then calibrate the model by summing the volume of sediments trapped in lakes and Dam?



  • PerrinePerrine Moderator, NatCap Staff
    Hi Sana, 

    I'm not sure I fully understand your question. It is possible to run the model with any subwatershed; then one thing to remember is that the sediment export at the outlet of a subwatershed is the sum of sed_export values for all the pixels located upstream.
    If you know the volume of sediment trapped in a lake or above a reservoir, you could use that as a calibration point (assuming you can estimate how much sediment is *not* trapped in the reservoir). To do this, you can use the DelineateIt tool to delineate the subwatershed above your point of interest.

    Does that help?
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