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Relation between QC(i) and horizontal flows

Thu, 01/28/2010 - 12:01am — Ravi
Hello, QC(i) is the model variable that contains the flow through the downstream edge of a segment ('i' is segment number) How is this related to the horizontal flows at different depths in a segment? Does QC(i) sum the flows (horizontal or vertical) over all depths? Thanks in advance, Ravi
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Hydrodynamics
Thu, 01/28/2010 - 12:36pm — chris

Hi Ravi, QC(i) is the sum of horizontal flows (all active layers) through the downstream edge of segment i. chris
Thu, 01/28/2010 - 8:54pm — Ravi

Thanks, Chris. I) Is there a way I can check that? - I have the QC(i) variable output for every time step for the DeGray example and I want to compare it to the sum of horizontal flows as a check of my code. But I don't know which layers are active at each time step. II) What does a negative value and a -9999 value represent for QC(i) physically? Is there a variable that stores the flow in each layer? III) what is the computational variable that stores elevation data for each timestep? Thanks, Ravi P.
Mon, 02/01/2010 - 12:58pm — chris

Hi Ravi, I) To check QC(I), you will have to go into the source code (QC is calculated in module w2_36_win.f90) and modify the code and/or use a debugger. II) A negative value for QC means a reverse flow. I don't know what -9999 is about. Also, I don't think there's a variable that stores the flow in each layer. You'll have to multiply the horizontal velocity U by the width and height of the layer. III) ELWS(i) stores the water surface elevation for each segment. chris