start:hype_model_description:hype_np_riv_lake
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start:hype_model_description:hype_np_riv_lake [2018/09/10 12:06] cpers [Nitrogen and phosphorus processes in rivers and lakes] |
start:hype_model_description:hype_np_riv_lake [2018/10/02 10:49] cpers [Denitrification] |
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| ===== Denitrification ===== | ===== Denitrification ===== | ||
| - | Denitrification, a sink for inorganic nitrogen in lakes and rivers, is a function of the bottom area, the IN concentration (//concfcn//) in water volume, water temperature (//tmpfcn//) and the general parameters //denitwrl// (local river), //denitwrm// (main river) and //denitwl// (lakes). In the concentration function, the half saturation parameter (//hsatINw//) is a general parameter, but it was in earlier HYPE versions a constant equal to 1.5 mg/L. Denitrification (//denitri_water//, //kg/day//) is limited to a maximum of 50% (//maxdenitriwater//) of the available IN pool (i.e. in SLP). | + | Denitrification, a sink for inorganic nitrogen in lakes and rivers, is a function of the bottom area, the IN concentration (//conc//) in water volume, water temperature (<m>T_w</m>) and the general parameters //denitwrl// (local river), //denitwrm// (main river) and //denitwl// (lakes). In the concentration function, the half saturation parameter (//hsatINw//) is a general parameter, but it was in earlier HYPE versions a constant equal to 1.5 mg/L. Denitrification (//denitri_water//, //kg/day//) is limited to a maximum of 50% of the available IN pool (i.e. in SLP). |
| + | |||
| + | <m> tmpfcn=delim{lbrace}{ | ||
| + | matrix{3}{2}{ | ||
| + | 0 {T_w<0} | ||
| + | {T_w/5}*{2^{{T_w-20}/{10}}} {0<T_w<5} | ||
| + | 2^{{T_w-20}/{10}} else | ||
| + | }}{} </m> | ||
| + | |||
| + | <m> concfcn= conc/{conc+hsatINw} </m> | ||
| + | |||
| + | <m> denitri_water = MIN(0.5* INpool,denitw*area*concfcn*tmpfcn) </m> | ||
| tmpfcn = 2**((watertemp - 20) / 10) | tmpfcn = 2**((watertemp - 20) / 10) | ||
start/hype_model_description/hype_np_riv_lake.txt · Last modified: 2024/01/25 11:37 (external edit)
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