The Snow Accumulation and Ablation Model

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The Snow Accumulation and Ablation Model is used to process precipitation which falls in non-liquid form.
An accounting is kept within the model of the amount of precipitation which accumulates as solid precipitation and the cold content of the resulting accumulation.
Later, as temperatures rise, the model 'melts' the accumulated pack and this liquid water becomes available to be processed by the soil moisture accounting model.

Here are the parameters that typically have the greatest effect on the simulation results (along with a category of minor parameters):

  click on each for a brief discussion

SCF	MFMAX-MFMIN
UADJ	SI and the areal depletion curve

There are minor parameters within the snow model which normally can be determined in advance based on a knowledge of the typical climatic and snow cover conditions for the area. The initial estimates may require one or two slight adjustments, but the determination of the appropriate values of these parameters is usually a small part of the calibration process.

minor parameters