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start:hype_model_description:hype_np_riv_lake

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start:hype_model_description:hype_np_riv_lake [2020/02/14 11:20]
cpers [Primary production and mineralization]
start:hype_model_description:hype_np_riv_lake [2020/02/14 11:20] (current)
cpers [Primary production and mineralization]
Line 106: Line 106:
 <m> TPfcn = {TP-lim} / {(TP-lim) + hsatTP} </m> <m> TPfcn = {TP-lim} / {(TP-lim) + hsatTP} </m>
  
-For lakes, the process is acting only in lake part SLP, while the processes are active throughout the watercourse volume. The estimated production/​mineralization (//​minprodNpot//,​ kg / day) is the potential transformation,​ and may be limited by the availability of nutrients. Only 50% of the available IN the pool (at the primary production) or 50% of the ON-pool (for mineralization) can be transformed. The potential phosphorus conversion (//​minprodPpot//​) is calculated in the same way, but with its own parameter (//​wprodp//​) and a factor for phosphorus/​nitrogen ratio (//​NPratio//​ = 1/7.2). Similarly, there is a restriction against transforming maximum 50% of the SP and PP pools. The parameters //wprodn// and //wprodp// is generic or can be specified for each lake. The area is equal to lake area for lakes and bottom area for rivers (width multiplied by the length of the watercourse,​ see [[start:​hype_model_description:​hype_np_riv_lake#​basic_assumptions|Basic assumptions]] or if the river is a class, the class' area). The water depth (//depth//) is the SLP lake part, and for the river the depth calculated [[start:​hype_model_description:​hype_np_riv_lake#​basic_assumptions|above]].+For lakes, the process is acting only in lake part SLP, while the processes are active throughout the watercourse volume. The estimated production/​mineralization (//​minprodNpot//,​ kg / day) is the potential transformation,​ and may be limited by the availability of nutrients. Only 50% of the available IN the pool (at the primary production) or 50% of the ON-pool (for mineralization) can be transformed. The potential phosphorus conversion (//​minprodPpot//​) is calculated in the same way, but with its own parameter (//​wprodp//​) and a factor for phosphorus/​nitrogen ratio (//​NPratio//​ = 1/7.2). Similarly, there is a restriction against transforming maximum 50% of the SP and PP pools. The parameters //wprodn// and //wprodp// is generic or can be specified for each lake. The area is equal to lake area for lakes and bottom area for rivers (width multiplied by the length of the watercourse,​ see [[start:​hype_model_description:​hype_np_riv_lake#​basic_assumptions|Basic assumptions]]or if the river is a class, the class' area). The water depth (//depth//) is the SLP lake part, and for the river the depth calculated [[start:​hype_model_description:​hype_np_riv_lake#​basic_assumptions|above]].
  
  
start/hype_model_description/hype_np_riv_lake.txt ยท Last modified: 2020/02/14 11:20 by cpers