Ground bottom flow formula (Water Overlay): Difference between revisions

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: [[Underground model (Water Overlay)|Underground model]]
: [[Underground model (Water Overlay)|Underground model]]
: [[Infiltration model (Water Overlay)|Infiltration model]]
: [[Infiltration model (Water Overlay)|Infiltration model]]
==See also==
* The formula is based on the formula of Pankow for [http://grondwaterformules.nl/index.php/formules/ontwatering/kwel-berekenen-pankow  estimating seepage]


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Revision as of 10:03, 10 July 2020

Underground seepage (from (or to) outside the project area) is calculated per cell.

The seepage is calculated using the following formula:

The external seepage head is variable over time by the introduction of hv,t

Finally, calculate the actual amount of water seeping into (or out of) the ground from the bottom.

Where:

  • = The underground seepage which takes place, in meters.
  • = Computational timestep in seconds.
  • = ground water level (or head) of the external zone causing the seepage at time t, in meters
  • = constant ground water level (or head) of the external zone causing the seepage, in meters
  • = additional variation of seepage head over time
  • = resistance of the separating layer in days
  • = water storage fraction of the soil

Related

The following topics are related to this formula.

Formulas
Groundwater level formula
Surface infiltration formula
Models
Underground model
Infiltration model

See also

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