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start:hype_model_description:hype_np_riv_lake [2020/04/30 09:11]
cpers [Primary production and mineralization]
start:hype_model_description:hype_np_riv_lake [2020/04/30 09:12] (current)
cpers [Macrophyte uptake]
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 =====Macrophyte uptake===== =====Macrophyte uptake=====
  
-For shallow waters in lakes macrophytes can grow and take up inorganic nutrients (IN and SP). The nutrients are lost to the model. Macrophyte uptake are controlled by a temperature function (//​tmpfcn//​) and a concentration function (//TPfcn//) for total phosphorus. The temperature function is composed of two parts; one exponential and one dependent on the water temperature (//Tw//) above the average temperature of the last twenty days (//T20//). The concentration function is the same half-saturation function as for production and mineralisation [[http://​www.smhi.net/​hype/​wiki/​doku.php?​id=start:​hype_model_description:​hype_np_riv_lake#​primary_production_and_mineralization|above]].+For shallow waters in lakes macrophytes can grow and take up inorganic nutrients (IN and SP). The nutrients are lost to the model. Macrophyte uptake are controlled by a temperature function (//​tmpfcn//​) and a concentration function (//TPfcn//) for total phosphorus. The temperature function is composed of two parts; one exponential and one dependent on the water temperature (//Tw//) above the average temperature of the last twenty days (//T20//). The concentration function is the same half-saturation function as for production and mineralisation [[start:​hype_model_description:​hype_np_riv_lake#​primary_production_and_mineralization|above]].
  
 <m> tmpfcn = (Tw/20)^0.3 * (Tw-T20)/5, Tw>0 and tempfcn>​0 </m> <m> tmpfcn = (Tw/20)^0.3 * (Tw-T20)/5, Tw>0 and tempfcn>​0 </m>
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 <m> upt = uptpar * tmpfcn * TPfcn * fracarea </m> <m> upt = uptpar * tmpfcn * TPfcn * fracarea </m>
  
-The uptake rate parameters (//​uptpar//​),​ different for IN and SP, are general (//muptn, muptp//). The process is similar to the [[http://​www.smhi.net/​hype/​wiki/​doku.php?​id=start:​hype_model_description:​hype_human_water#​wetland_nutrient_processes1|modelled macrophyte uptake in wetlands]].+The uptake rate parameters (//​uptpar//​),​ different for IN and SP, are general (//muptn, muptp//). The process is similar to the [[start:​hype_model_description:​hype_human_water#​wetland_nutrient_processes1|modelled macrophyte uptake in wetlands]].
  
 ==== Links to file reference ==== ==== Links to file reference ====
start/hype_model_description/hype_np_riv_lake.txt ยท Last modified: 2020/04/30 09:12 by cpers