View source for Lateral MWT

Once melt-water flows vertically through the pack ('''[[Vertical MWT]]''') it reaches the saturated area above the ground and below the snow pack.  This melt-water moves laterally along the ground through a saturated Darcian flow.  GSSHA currently uses methods developed by Colbeck (1974) to determine the flux volumes between each cell.  The equation and figure - from Colbeck (1974) - show how the flux rate is calculated for lateral flow.

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| width=550 | ''c = θ * α * K<sub>w</sub> / Φ || (1)
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|''c = lateral flux rate (m<sup>2</sup>/hr)
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|''θ = lateral slope (deg)
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|''α = hydraulic properties of water, constant (ρ*g/μ ~54.7x10<sup>-6</sup> m<sup>-1</sup> s<sup>-1</sup>)
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{| |- | : | width=550 
|''K<sub>w</sub> = saturated hydraulic conductivity of snow (~0.00555 m s<sup>-1</sup>)
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|''Φ = effective porosity (unitless)
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[[File:Colbeck_1974_Picture.jpg]]