Abstract
Darcy flow equations relating vertical and bedding-parallel flow to vertical and bedding-parallel gradient components are derived for a skewed Cartesian grid in a vertical plane, correcting for structural dip given the principal hydraulic conductivities in bedding-parallel and bedding-orthogonal directions. Incorrect-minus-correct flow error results are presented for ranges of structural dip (0 ≤ θ ≤ 90) and gradient directions (0 ≤ φ ≤ 360). The equations can be coded into ground water models (e.g., MODFLOW) that can use a skewed Cartesian coordinate system to simulate flow in structural terrain with deformed bedding planes. Models modified with these equations will require input arrays of strike and dip, and a solver that can handle off-diagonal hydraulic conductivity terms.
Original language | English (US) |
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Pages (from-to) | 841-846 |
Number of pages | 6 |
Journal | Ground water |
Volume | 41 |
Issue number | 6 |
DOIs | |
State | Published - Nov 2003 |
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Computers in Earth Sciences