I want to know whether the utility “getefdc” can extract the derived parameters, such as TON, TSI, Chla, from the outfiles or not? if it not, can you tell me the convenient way to obtain them? or tell me the corresponding source code, then I would know the EE how to calculate them in the viewplan, Thank you.
The derived parameters are calculated in EE using the EFDC output so they cannot be obtained using getEFDC. If you wanted to you could extract the WQ parameters from EFDC and then use the equations provided here to calculated the derived parameters: https://www.eemodelingsystem.com/forums/topic/equations-for-derived-water-quality-parameters
Thank you for your answer, however, there is no equation to obtain the derived parameter, TSI, thank you.
Not sure what you mean when you say “there is no equation to obtain the derived parameter”. The equations in the post mention by EE Development Team is as follows:
’ *** Water Quality
’ *** 1) CHC - cyanobacteria
’ *** 2) CHG - diatom algae
’ *** 3) CHD - green algae
’ *** 4) ROC - refractory particulate organic carbon
’ *** 5) LOC - labile particulate organic carbon
’ *** 6) DOC - dissolved organic carbon
’ *** 7) ROP - refractory particulate organic phosphorus
’ *** cool LOP - labile particulate organic phosphorus
’ *** 9) DOP - dissolved organic phosphorus
’ *** 10) P4D - total phosphate
’ *** 11) RON - refractory particulate organic nitrogen
’ *** 12) LON - labile particulate organic nitrogen
’ *** 13) DON - dissolved organic nitrogen
’ *** 14) NHX - ammonia nitrogen
’ *** 15) NOX - nitrate nitrogen
’ *** 16) SUU - particulate biogenic silica
’ *** 17) SAA - dissolved available silica
’ *** 18) COD - chemical oxygen demand
’ *** 19) DOX - dissolved oxygen
’ *** 20) TAM - total active metal
’ *** 21) FCB - fecal coliform bacteria
’ *** NWQV+1) MAC - fecal coliform bacteria
’ *** Water Quality Derived Parameters
’ *** 23 - Total Organic Carbon
TOC = CHC + CHG + CHD + ROC + LOC + DOC
’ *** 24 - Total N
TN = AlgaeRatio(N:C)(CHC + CHG + CHD) + RON + LON + DON + NHX + NOX
’ *** 25 - Total P
TP = AlgaeRatio(P:C)(CHC + CHG + CHD) + ROP + LOP + DOP + P4D
’ *** 26 - Chlorophyll a
Chl-a = AlgaeRatio(Chla:C)CHC + AlgaeRatio(Chla:C)CHG + AlgaeRatio(Chla:C)CHD
’ *** 27 - Total Organic N
TON = AlgaeRatio(N:C)(CHC + CHG + CHD) + RON + LON + DON
’ *** 28 - Total Inorganic N
TIN = NHX + NOX
’ *** 29 - Total Organic P
TOP = AlgaeRatio(P:C)(CHC + CHG + CHD) + ROP + LOP + DOP
’ *** 48 - Carlson’s Trophic State Index
’ *** 49 - Particulate Organic Carbon
POC = CHC + CHG + CHD + ROC + LOC
’ *** 50 - Particulate Organic Phosphorus
POP = AlgaeRatio(P:C)(CHC + CHG + CHD) + ROP + LOP
’ *** 51 - Particulate Organic Nitrogen
PON = AlgaeRatio(N:C)(CHC + CHG + CHD) + RON + LON
’ *** 52 - Total Suspended Solids (Inorganic + Organic) TSS(io)
TSSio = TSED + TSND + CHC + CHG + CHD + ROC + LOC
’ *** 53 - Total Kjedahl Nitrogen (TKN)
TKN = PON + NHX
TKN = AlgaeRatio(N:C)(CHC + CHG + CHD) + RON + LON + NHX
’ *** 54 - Total Dissolved Phosphorous (DOP+PO4)
TDP = DOP + PO4
’ *** 55 - Macroalgae per unit area ug Chl-a/m2
MAC/m2 = AlgaeRatio(Chla:C)*MAC/Thickness[Layer 1]
I am sorry for not expressing this question clearly, I means that how to obtain the Carlson’s Trophic State Index, and there is no correspoding eqution to obtain it, thank you.