2-D Evaporation and Root Extraction in an FEM

by Richard G. Allen, Utah State Univ, Logan, United States,
Wigdan I. Ahmad, Utah State Univ, Logan, United States,



Document Type: Proceeding Paper

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

Abstract:

Two-dimensional processes of soil evaporation and moisture extraction by plant roots (horizontal and vertical) were incorporated into a saturated/unsaturated finite element model (UNSAT2) to predict two dimensional soil moisture profiles under a corn crop. Soil evaporation algorithms included microadvection of unused evaporative energy from dry soil areas toward areas of moist soil surfaces and diffusive evaporation from subsurface nodes.



Subject Headings: Soil water | Two-dimensional models | Evaporation | Finite element method | Crops | Vegetation | Saturated soils | Algorithms

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