Appendix C - Specialized Property Editors

The Aquifer Editor is invoked whenever a new aquifer object is created, or an existing aquifer object is selected for editing. It contains the following data fields:

·        Name: User assigned aquifer name.

·        Porosity: Volume of voids / total soil volume (volumetric fraction).

·        WiltingPoint: Soil moisture content at which plants cannot survive (volumetric fraction).

·        Field Capacity: Soil moisture content after all free water has drained off (volumetric fraction).

·        Conductivity: Soil's saturated hydraulic conductivity (in/hr or mm/hr).

·        Conductivity Slope: Average slope of log(conductivity) vs. soil moisture deficit (porosity minus moisture content) curve (unitless).

·        Tension Slope: Average slope of soil tension versus soil moisture content curve (inches or mm).

·        Upper Evaporation Fraction: Fraction of total evaporation available for evapotranspiration in the upper unsaturated zone.

·        Lower Evaporation Depth: Maximum depth into the lower saturated zone over which evapotranspiration can occur (ft or m).

·        Lower Groundwater Loss Rate: Rate of percolation from saturated zone to deep groundwater (in/hr or mm/hr).

·        Bottom Elevation: Bottom elevation of aquifer (ft or m).

·        Water Table Elevation: Elevation of the water table in the aquifer at the start of the simulation (ft or m).

·        Unsaturated Zone Moisture: Moisture content of the unsaturated upper zone of the aquifer at the start of the simulation (volumetric fraction) (cannot exceed soil porosity).

·        Upper Evaporation Pattern: Name of the monthly time pattern of adjustments applied to the upper evaporation fraction (optional – leave blank if not applicable).