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start:hype_model_description:hype_np_soil

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start:hype_model_description:hype_np_soil [2019/12/19 16:44]
cpers [Soil erosion]
start:hype_model_description:hype_np_soil [2019/12/19 16:49] (current)
cpers [Soil erosion]
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-Eventually the eroded ​PP (kg/km2) is calculated as:+Eventually the mobilised ​PP (kg/km2) is calculated as:
  
 <m> mobilP = 0.000001 * mobilSed * {{PartP + HumusP}/ {thickness * bulkdensity}} * enrichment </m> <m> mobilP = 0.000001 * mobilSed * {{PartP + HumusP}/ {thickness * bulkdensity}} * enrichment </m>
  
-The calculated mobilised ​sediment (//​mobilSed//​) and phosphorus (//​mobilP//​) ​are now available to add to the suspended sediment (SS) or particulate phosphorus (PP) of surface runoff.+The calculated mobilised phosphorus (//​mobilP//​) ​is now available to add to the particulate phosphorus (PP) of surface runoff.
    
-A portion of SS and PP in surface runoff (//sflow//) is filtered out (for example by buffer zones). Filtering (//​srfilt//​) is determined by land use dependent parameters (//​bufferfilt,​ innerfilt, otherfilt//​),​ percentage of agricultural land close to a watercourse (//alfa//), and proportion of agricultural land near the rivers which have a protective buffer zone (//​bufferpart//​).+A portion of PP in surface runoff (//sflow//) is filtered out (for example by buffer zones). Filtering (//​srfilt//​) is determined by land use dependent parameters (//​bufferfilt,​ innerfilt, otherfilt//​),​ percentage of agricultural land close to a watercourse (//alfa//), and proportion of agricultural land near the rivers which have a protective buffer zone (//​bufferpart//​).
  
 <m> srfilt = otherfilt + alfa * (1. + bufferpart * (bufferfilt - 1.)) + innerfilt * (1. - alfa) </m> <m> srfilt = otherfilt + alfa * (1. + bufferpart * (bufferfilt - 1.)) + innerfilt * (1. - alfa) </m>
  
-Similarly, part of the SS and PP which is transported by macropore flow (//mflow//) is filtered away between the soil surface and drainage pipes. The parameter that determines this effect (//​macrofilt//​) is soil dependent. The SS or PP transported (//mobilSed//) by surface runoff and macropore flow is collected in a temporary storage pool (//​relpool//​ (kg/km2)) together with SS and PP in tile runoff (//​tilep//​).+Similarly, part of the PP which is transported by macropore flow (//mflow//) is filtered away between the soil surface and drainage pipes. The parameter that determines this effect (//​macrofilt//​) is soil dependent. The PP transported (//erodedP//) by surface runoff and macropore flow is collected in a temporary storage pool (//​relpool//​ (kg/km2)) together with PP in tile runoff (//​tilep//​).
  
-<​m> ​erodedSed = (srfilt*sflow+macrofilt*mflow)*mobilSed/​eflow </m> or +<​m> ​erodedP ​= (srfilt*sflow+macrofilt*mflow)*mobilP/​eflow </m>
-<m> erodedSed ​= (srfilt*sflow+macrofilt*mflow)*mobilP/​eflow </m>+
  
 <m> eflow=sflow+mflow </m> <m> eflow=sflow+mflow </m>
  
-<m> relpool = relpool + transp ​+ tilep </m> \\+<m> relpool = relpool + erodedP ​+ tilep </m> \\
  
-From the temporary pool sediment and phosphorus is released (//​release//​ (kg/km2)) and then transported to the local river depending on the size of the total runoff (//runoff// (mm)). The parameters //​pprelmax//​ and //​pprelexp//​ are general.+From the temporary pool phosphorus is released (//​release//​ (kg/km2)) and then transported to the local river depending on the size of the total runoff (//runoff// (mm)). The parameters //​pprelmax//​ and //​pprelexp//​ are general.
  
 <m> release = MIN(relpool,​ relpool *(runoff {/} pprelmax)^{pprelexp}) </m> <m> release = MIN(relpool,​ relpool *(runoff {/} pprelmax)^{pprelexp}) </m>
start/hype_model_description/hype_np_soil.txt · Last modified: 2019/12/19 16:49 by cpers