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Edit Model Coefficients
Edit calibration factors & model coefficients
that apply to all segments.
The default coefficients generally reflect the original model calibrations to CE reservoirs. Adjustment of these values is justified only if supported by site-specific data.
The first 9 rows contains that are calibration factors are multiplied by the predicted concentrations in each segment. The default means (=1.0) and CV's reflect the standard errors of model forecasts when applied to CE reservoir dataset.
For example, changing the mean value
for the Chlorophyll-a coefficient from 1.0 (default value) to 0.6 will
reduce the predicted chlorophyll-a values in each segment to 60% of the
original estimates, regardless of which chlorophyll model is
used.
Calibration Coefficients for PHOSPHORUS and
NITROGEN are applied to predicted sedimentation rates or to predicted
concentrations, depending upon the selected calibration option (see
Edit Model Selections).
MINIMUM QS = lowest overflow rate used in computing nutrient sedimentation coefficients. This is normally 4.0 m/yr (the lowest value in the CE reservoir dataset used in model development). Setting this value to 0.0 m/yr will allow extrapolation of the model beyond the calibration range. Limited data from non-CE reservoirs and lakes suggest that this may be justified, but the uncertainty in model predictions is relatively high in lakes and reservoirs with low overflow rates.
Chl-a FLUSHING TERM = an adjustment factor that is multiplied by the flushing term in Chl-a Models 1 & 2 (normally = 1.0). Setting this factor to 0 will eliminate the influence of flushing rate on the predicted chlorophyll-a concentrations. This may be appropriate, for example, in situations were the reservoir is immediately downstream of another reservoir with a sufficient hydraulic residence time to allow algal populations to develop.
CHL-A Temporal CV = Chl-a-a temporal coefficient of variation used in computing algal bloom frequencies (typical value = .62). < /FONT >
Availability Factors are used in computing nutrient sedimentation rates.
See: Button Functions