Solar Radiation Data Fields
    • 05 Aug 2022
    • 1 Minute to read

    Solar Radiation Data Fields


    Article summary

    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 Solar Radiation 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 Solar Radiation (as shown on the Figure below) and type in the necessary information for this pollutant in the format documented in the section Datafile Format below. 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.
    WaterQualityimagesimage18.jpg

    Datafile Format

    (1) If the user wishes to specify hourly values of solar radiation between 5:00 and 20:00 hours of each day use:

    Line 1                SOLAR RADIATION

    Line 2                HOURLY

    Line 3                mday, mmonth, myear

    Lines 4 & 5        solcon(lday) lday = 5,20 (2 lines)

    Lines 3 to 5 are repeated for each day of the simulation.

    Last line            SOLAREND

    Where:

    SOLAR RADIATION = keyword

    HOURLY = keyword

    mday, mmonth, myear = Date of subsequent solar radiation data.

    solcon(lday) lday = Amount of solar radiation (J/cm2) over each hour from 5am to 8pm

    SOLAREND = keyword

    (2) If the user wishes to specify daily values of solar radiation then use:

    Line 1        SOLAR RADIATION

    Line 2        DAILY

    Line 3        mday, mmonth, myear

    Lines 4       lenday, solcon

    Lines 3 and 4 are repeated for each day of the simulation.

    Last line    SOLAREND

    Where:

    DAILY = keyword

    lenday = Length of day (hours),

    solcon = amount of solar radiation over a typical hour during the day (J/cm2).

    (3) If the user wishes to set a constant solar radiation for the whole of the simulation use:

    Line 1       SOLAR RADIATION

    Line 2       CONSTANT

    Lines 4     lenday, solcon

    Last line   SOLAREND

    Where:

    CONSTANT = keyword

    lenday, solcon = Length of day (hours) used throughout the whole simulation, amount of solar radiation over a typical hour for use throughout out the whole simulation (J/cm2).

    Note: The equations used to determine light limitation include light only as the ratio I/Imax. The actual units used for light are therefore irrelevant provided that the same units are used for I and Imax. Normally the 1D Water Quality Solver assumes units of J/cm2.


    Overview

    Solar Radiation



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