Lecture GB - Methodology Setup Regional Models
8 important questions on Lecture GB - Methodology Setup Regional Models
Initial conditions = heads at beginning of our simulations
- Only used for transient simulations
- MODFLOW diff eq
- integral Qi = wells, etc(?)
- Integral Q(H)i = (?)
- Initial conditions on left hand side of eq
- S = storage
What's the cov matrix used for? What's on the diagonals?
- Diagonals have variances
- St devs also (not sure where)
- Can be used to calculate derived uncertainties
What is most important within the Domain - Extent to take into account when defining the domain?
Extent:
- Far enough > minor effect on Binnenveld
- Regional GW flow pattern captured
- Take aquifer with largest 'flow'
- Upper aquifer mostly affected by local aspects
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Why is the Rijn invisible on equipotential lines of GW flow in the graph?
Why can upper and deeper aquifer equipotential lines deviate? Why do we pick flowlines of largest aquifer?
Depth and transmissivity
To not have conflicting boundaries, we have to simplify somewhere
On what is Dirichlet based and how is it brought into practise?
Prac: isohypse
On what is Neumann based and how is it brought into practise?
Prac: flow line (no flow), eg perpendicular to equipotential lines, water divide
On what is Cauchy based and how is it brought into practise?
Prac: effect of Dirichlet 'far' away, linearly interpolated using a formula including features (kD, LW)
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