| Summary: | In an effort to better predict both soil water flow and soil nitrogen processes at sites
within the Fraser Valley, the simplistic soil water algorithms of the Bulley and Cappelaere
(1978) nitrogen management model were replaced by the more accurate algorithms of
Richard (1988). The modified model was then calibrated using field-measured water table
levels for 1992. A sensitivity analysis was performed and model simulations were run for
November and December 1991 and January through September 1993. Results from the
modified and unmodified models were compared to field nitrogen and soil moisture data
collected at two sites in the Lower Fraser Valley.
Incorporation of the Richard (1988) soil water algorithms in the Bulley and Cap
pelaere (1978) nitrogen management model improved model representation of soil water
regimes, but did not improve simulated soil nitrogen processes. Discrepancies between
model predicted and field-measured values were attributed to spatial variability in field
data, lack of field-measured parameters for use as model input, and poor model descrip
tions of soil nitrogen processes. === Applied Science, Faculty of === Chemical and Biological Engineering, Department of === Graduate
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