Data Input
In order to input the required information for this pollutant into the Water Quality model, the user needs to make sure that the Tab Temperature appears in the WQ General Tab (please follow the description on the page Preparing a Water Quality Datafile for this). Then the user needs to select the Tab Temperature (as shown on the Figure below) and type in the necessary information for this pollutant in the fields which are shown on this Tab. Alternatively the necessary information for this pollutant can be typed in the .con file opened in a Textpad editor in the datafile format mentioned below.
Datafile Format
If a constant water temperature is to be simulated then the following format should be used:
Line 1 TEMPERATURE
Line 2 CONSTANT
Line 3 celsius
If a variable water temperature is to be simulated then use the following format:
Line 1 TEMPERATURE
Line 2 VARIABLE
Line 3 ftemp, celsius
If a prescribed temperature is to be used then use:
Line 1 TEMPERATURE
Line 2 PRESCRIBED
Line 3 'DATE', 'DAYS', 'WEEKS', 'LUNAR', 'MONTHS', 'YEARS', 'DECADES' or 'MULTIPLIER'
If the keyword 'MULTIPLIER' is used, then the following lines are read:
Line 4 fmult
Line 5 ndat
Or if the keyword 'MULTIPLIER' is not used, then the following line is read:
Line 4 ndat
The following lines are repeated 'ndat' times.
If the keyword 'DATE' is used, then temperatures must be specified using dates.
Line 5-end iday, imonth, iyear, temp
Or if the keyword 'DATE' is not used, then temperatures must be specified using times.
Line 5-end time, temp (Line 6 if keyword 'MULTIPLIER' was used)
Where:
TEMPERATURE = keyword
CONSTANT = keyword
VARIABLE = keyword
PRESCRIBED = keyword
celsius = Constant temperature imposed over whole model (celsius).
ftemp, celsius = Heat exchange coefficient at water surface (hour-1),
equilibrium water temperature (celsius).
fmult = Multiplier for times in prescribed TEMPERATURE data to convert
to hours.
ndat = Number of data points in time-history data.
iday, imonth, iyear, temp = Date (day/ month/ year), prescribed
temperature (celsius).
time, temp = Time (days, weeks, months etc), prescribed temperature (celsius).
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