Category 1
This category contains the parameters that need to be determined through trial-and-error and automatic calibration procedures.
These parameters typically can't be determined based on a hydrograph analysis or physiographic factors.
Some of the Category 1 parameters are:
- AIXW, CW, AIXD, CD - these first quadrant parameters define the wet and dry curves relating API to AI and are probably the most critical parameters to be determined by the calibration process.
AIXW -- intercept of wet curve
CW -- wet curve curvature constant
AIXD -- intercept of dry curve
CD -- dry curve curvature constant
AICR -- critical AI value
CG -- curvature constant for ground water inflow
- AICR, CG - These fourth quadrant parameters control how much of the precipitation that doesn't become surface runoff enters groundwater storage. The parameters control the magnitude of baseflow.
AICR -- critical AI value
CG -- curvature constant for ground water
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The parameters of the basic Continuous API Model can be divided into 3 categories.