Design of Transient and Steady State Drain Spacing

by Lyman S. Willardson, Utah State Univ, Logan, United States,
Masoud Alemi, Utah State Univ, Logan, United States,

Document Type: Proceeding Paper

Part of: Irrigation and Drainage: Saving a Threatened Resource—In Search of Solutions


Drain spacings calculated by steady state or transient equations can be made equal by adjusting the design water table height used in the equations. The adjustments are not constant and depend on the relative magnitude of the different equation parameters. Two equations are presented that allow a choice of drain spacing equations that give comparable spacings for both humid and arid areas.

Subject Headings: Transient response | Steady states | Drainage | Spacing | Groundwater flow | Transient flow | Subsurface drainage | Equations of state

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