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sensitivity analysis


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I am using CMS and make steering between both flow and wave model(CMS-FLOW, CMS-WAVE) to obtain morphology change of inlet area.While making sensitivity analysis as I don't have any station beside the one existed already in offshore area, I make sensitivity and calibration by measured profiles (morphology change at cross section) as following:

1.I tried Manning coff., d50 for the default formula(Land Cirp),

2. then different formulas(Land-Cirp, VanRijin, and Solusby), and found the best is VanRijin

3. then change d50 with VanRijin but there are no difference??

My question

Why d50 did not give significant results with d50 or may be any mistakes in input parameters( When I change d50 I keep Manning in both flow and wave constant , and also transport grain size) ....Is it O.k?

Need your advices

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