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While it is common in the literature to use various roughness coefficients I have, for
several reasons, used a 'relaxation time' constant instead.
- Simplicity and speed of calculation.
- Full use of Manning's equation requires more information about the channel than I have.
- The relaxation time governs how quickly the differences between levels in lake cells
settle out. ie. Governs the ``time taken for the lake to relax''. See equation 34
John Carter
Tue Jun 17 09:50:07 SAT 1997