Data Input
I n order to input the required information for this pollutant into the Water Quality model, the user needs to make sure that the Tab Phytoplankton 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 Phytoplankton 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
Line 1 PHYTOPLANKTON
Line 2 knutrient, kPH, kS, rphtn, rphtp, rphts
Line 3 gr1p, cinc1p, gr2p, cinc2p, tcrit
Line 4 slmxph, extpht, rpht20, q10pht, dethph
Line 5 dcdcay, alphdc, vdcset
Where:
PHYTOPLANKTON = keyword
knutrient= half saturation constant for nitrate uptake (mg/l)
kPH= half saturation constant for phosphate uptake (mg/l)
kS= half saturation constant for silicate uptake (mg/l)
rphtn = nitrogen to carbon ratio
rphtp = phosphorus to carbon ratio
rphts = silicon to carbon ratio
gr1p = maximum productivity (loge(Pmax) = mT+c) parameters: gradient below TCRIT
cinc1p = maximum productivity (loge(Pmax) = mT+c) parameters:intercept below TCRIT
gr2p = maximum productivity (loge(Pmax) = mT+c) parameters: gradient above TCRIT
cinc2p = maximum productivity (loge(Pmax) = mT+c) parameters: intercept above TCRIT
tcrit = maximum productivity (loge(Pmax) = mT+c) parameters: TCRIT(oC)
slmxph = Solar radiation for maximum productivity (kJ/cm2/hour)
extpht = light extinction factor due to phytoplankton
rpht20 = respiration rate at 20C (day-1)
q10pht = Q 10 value for respiration of phytoplankton
dethph = mortality rate constant for phytoplankton (day-1)
dcdcay = Detrital carbon parameters: decay constant at 20C (day-1)
alphdc = factor for temperature dependence
vdcset = settling velocity for detrital carbon (mm/s)
Overview