Temperature Data Fields

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).

Overview

Temperature