Drainage formula (Water Overlay): Difference between revisions
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if w_w > w_g then: | if w_w > w_g then: | ||
<math>Q_{max} = A_w \cdot (w_w - z_w | <math>Q_{max} = A_w \cdot (w_w - z_w) </math> | ||
else: | else: |
Revision as of 15:05, 4 December 2020
Drainage passive: First the flow capacity is calculated
if w_w > w_g then:
else:
where:
- is the ground water level in meters
- is the water level in the waterway
- is the drainage datum height in meters.
- is the drainage area size in square meters.
- is the average storage percentage of the ground above the drainage.
- is the amount transfered for a balanced ground and surface water level
- is the amount available in the ground above the drainage.
- is the drainage capacity at time t
- is the actual drainage at time t