Assigning Conductance with general head boundary (GHB) in modelmuse

[RM]

Hi All:

I am a little confused about setting up cell by cell conductance for the general head boundary (GHB) in my model. The description here indicates polygon object but in my case I have distant point head measurements for each cell (& layer) of my model domain. This is what I have been doing so far:

1. the surface area of each of the grid cells exchanging flow from external source is 1 m X 50 m (cell width multiplied by cell length)

2. the heads I will be using as GHB at my model boundary are 1000 m away (this is the sediment thickness)

3. the general hydraulic conductivity for the sediment is 1E-4 m/sec

4. for each cell, I set the "conductance interpretation" in modelmuse as "Direct"

5. the conductance is then calculated: (1 X 50 X 1E-4)/1000 or 5E-6 m2/sec

Is this the correct way of assigning conductance for each cell by intersection?

Thanks for your thought. -RM

[elnaz pezeshki]

Select nodes on each points you have the head. Then set the GHB data to that point and then select the arc between the nodes and set them as specific head

 

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[Richard Winston]

It sounds correct if there really is a thousand meters of sediment separating the grid cell from the head in the general head boundary.

Why is the length of the cell so much greater than the width?

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