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start:hype_model_description:hype_np_soil

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start:hype_model_description:hype_np_soil [2018/08/10 16:33]
cpers [Balance SP – PartP]
start:hype_model_description:hype_np_soil [2018/08/10 16:37] (current)
cpers [Balance SP – PartP]
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   ENDDO   ENDDO
  
-The coefficients //Kfr//, and //Nfr// are soil dependent, bulkdensity is the dry density of soil (= 1300 kg/m3) and soilthick is the soil layer thickness. //fxn// is function value for the concentration //xn//, //fprimx// is the function value of the derivative of //fxn//, and <m>xn_{1}</m> is the concentration of the next iteration. The resulting SP equilibrium concentration (//xn=xn_1//) is used to calculate the PP eqiuilibrium concentration (<​m> ​PPequi{_}conc</​m>​). +The coefficients //Kfr//, and //Nfr// are soil dependent, bulkdensity is the dry density of soil (= 1300 kg/m3) and soilthick is the soil layer thickness. //fxn// is function value for the concentration //xn//, //fprimx// is the function value of the derivative of //fxn//, and <m>xn_1</m> is the concentration of the next iteration. The resulting SP equilibrium concentration (<m>xn=xn_1</m>) is used to calculate the PP eqiuilibrium concentration (<m>PPequi_{conc}</​m>​). 
-A new SP concentration (//SP_conc//) is calculated from the previous concentration (//SP_conc_old/​/) and the equilibrium concentration,​ taking into account the balance is not reached during the time step.+A new SP concentration (<m>SP_conc</m>) is calculated from the previous concentration (<m>SP_conc_old</m>) and the equilibrium concentration,​ taking into account the balance is not reached during the time step.
  
-<​m> ​PPequi{_}conc = Kfr * ({xn_{1}}^{Nfr}) </m>+<​m> ​PPequi_{conc} = Kfr * ({xn_1}^{Nfr}) </m>
  
-<m> Adsdes = (PPequi{_}conc - concsolid)*(1-e^{-Kadsdes}) </m>+<m> Adsdes = (PPequi_{conc- concsolid)*(1-e^{-Kadsdes}) </m>
  
-<​m> ​SP{_}conc ​SP{_}conc{_}old ​- {(Adsdes * bulkdensity * LayerThick)/​ vol} </m>+<​m> ​SP_conc ​SP_conc_old ​- {(Adsdes * bulkdensity * LayerThick)/​ vol} </m>
  
 //Adsdes// is the amount of adsorbed/​desorbed P, //Kadsdes// is a soil dependent rate constant, //​equi_concsolid//​ is the solid phase equilibrium concentration,​ and //​concsolid//​ is the initial concentration the solid phase. //Adsdes// is the amount of adsorbed/​desorbed P, //Kadsdes// is a soil dependent rate constant, //​equi_concsolid//​ is the solid phase equilibrium concentration,​ and //​concsolid//​ is the initial concentration the solid phase.
start/hype_model_description/hype_np_soil.txt · Last modified: 2018/08/10 16:37 by cpers