- Introduction
- Physical parameters
- Chemical parameters
- Conversion factors
- Algal parameters
- Zooplankton parameters
- Detritus parameters
- Microfytobenthos parameters
- Shellfish parameters
- References
Introduction
The parameters for the NPZ model are read from a text file located in the subdirectory "/Parameters/". In the runfile the reference to the parameter file is given. The references for the parameters are included in the parameter file.
The parameters are presented in the tables below. The first column is the name of the parameter that is used in the model. The second column presents the symbol of the parameter that is used in this wiki. The third column gives the default value and the fourth column gives the unit. In the last column a description of the parameter is given.
Physical parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| Q10 | Q_{10} | 2.01 | - | Temperature correction factor |
| sinkingrateP | SinkingRate_{Phy} | 0.21 | m d-1 | Sinking rate of phytoplankton |
| sinkingrateD | SinkingRate_{Det} | 1.01 | m d-1 | Sinking rate of detritus |
| QKrammer | Q_{Kr} | 9.0 | m3 s-1 | Av. discharge rate Krammersluizen |
| QBDiep | Q_{BD} | 0.5 | m3 s-1 | Av. discharge rate Bergse Diepsluis |
Chemical parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| MW_N | M_{N} |
14.0 | g mol-1 | Molar weight N |
| MW_C | M_{C} |
12.0 | g mol-1 | Molar weight C |
Conversion factors
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| ChlNratio | \varphi_{N}^{Chla} |
21 | mg-Chl mmol-N-1 | Chl-a:N ratio |
| CNratio | \varphi_{N}^{C} |
6.6251 | mol-C mol-N-1 | C:N Redfield ratio |
| CNShelfish | {\varphi_{N}^{C}}_{shellfish} |
5.472 | mol-C mol-N-1 | C:N ratio shellfish |
| AFDW2C | \varphi_{AFDW}^{C} |
0.43 | g-C g-AFDW-1 | gAFDW to Carbon shellfish |
| WW2AFDW | \varphi_{WW}^{AFDW} |
0.253 | g-AFDW g-WW-1 | WW to AFDW shellfish |
| FW2WW_MUS | {\varphi_{FW}^{WW}}_{Mus} |
0.254 | g-WW g-FW-1 | Fresh weight to WW Mussels |
| FW2WW_OYS | {\varphi_{FW}^{WW}}_{Oys} |
0.055 | g-WW g-FW-1 | Fresh weight to WW Oysters |
| FW2WW_COC | {\varphi_{FW}^{WW}}_{Coc} |
0.15 | g-WW g-FW-1 | Fresh weight to WW cockles |
Algal parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| maxUptake | DIN_{upt,max} |
1.71 | d-1 | Maximum uptake rate at 10\degreeC |
| ksPAR | ks_{PAR} |
1401 |
\muE m-2 d-1
|
Half-saturation coefficient for light |
| ksDIN | ks_{DIN} |
1.01 | mmolN m-3 | Half-saturation coefficient for DIN |
Zooplankton parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| maxZooGrazing | ZooGrazing_{max} |
0.81 | d-1 | Max grazing rate phytoplankton by zooplankton |
| ksZooGrazing | ks_{ZooGrazing} |
0.61 | mmol-N m-3 | Half saturation coefficient for grazing on Phyto |
| pFaecesZoo | p_{FaecesZoo} |
0.31 | - | Fraction of grazed phytoplankton excreted as faeces |
| RespZoo | Resp_{Zoo} |
0.081 | d-1 | First order rate constant Zooplankton respiration |
| MortRateZoo | M_{Zoo} |
0.451 | mmol-N-1m-3d-1 | Mortality rate of zooplankton |
Detritus parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| rDet | r_{Det} |
0.021 | d-1 | Mineralization rate pelagic detritus |
| rBotDet | r_{Bot\_Det} |
0.021 | d-1 | Mineralization rate bottom detritus |
| PDenit | p_{Denit} |
0.25 | - | Fraction of bottom N mineralization lost as N2 to the atmosphere due to denitrification |
Microfytobenthos parameters
| Name | Symbol | Value | Unit | Description |
|---|---|---|---|---|
| maxUptake_MPB | MPB_{upt,max} |
0.751 | d-1 | Maximum Uptake of DIN by microphytobenthos |
| ksPAR_MPB | ks_{PAR,MPB} |
1001 | E m-2 s-1 | Half-saturation coefficient for light |
| ksDIN_MPB | ks_{DIN,MPB} |
1.01 | mmol-N m-3 | Maximum DIN Uptake rate by MPB |
| carcap_MPB | CC_{MPB} |
100 | mmol-N m-2 | Maximum microphytobenthos biomass at mudflat |
| mort_MPB | M_{MPB} |
0.001256 | mmol-N-1m-2d-1 | Mortality rate of microphytobenthos |
| Exp | Exp |
0.57 | - | Exposure time intertidal areas |
Shellfish parameters
The parameters for shellfish can be seen by the link below
References
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Jiang, L., T. Gerkema, J. C. Kromkamp, D. Van Der Wal, P. M. Carrasco de la Cruz and K. Soetaert (2020) Drivers of the spatial phytoplankton gradient in estuarine–coastal systems: generic implications of a case study in a Dutch tidal bay. Biogeosciences 17: 4135-4152. link ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15 ↩16 ↩17 ↩18
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Smaal, A. C. en A. P. M. A. Vonck (1997) Seasonal variation in C, N and P budgets and tissue composition of the mussel Mytilus edulis. Marine Ecology Progress Series 153: 167-179 link. ↩
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Rueda, J. L., A. C. Smaal en H. Scholten (2005) A growth model of the cockle (Cerastoderma edule L.) tested in the Oosterschelde estuary (The Netherlands). Journal of Sea Research. link ↩ ↩2
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Scholten, H. en A. C. Smaal (1999) The ecophysiological response of mussels (Mytilus edulis) in mesocosms to a range of inorganic nutrient loads: simulations with the model EMMY. Aquatic Ecology 33: 83-100. link ↩
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Smaal, A. C., B. J. Kater en J. W. M. Wijsman (2009) Introduction, establishment and expansion of the Pacific oyster Crassostrea gigas in the Oosterschelde. Hegoländer Meeresuntersuchungen 63: 75-83. link ↩
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De Jong, D. J., P. H. Nienhuis en B. J. Kater (1994) Microphytobenthos in the Oosterschelde estuary (The Netherlands), 1981-1990; consequences of a changed tidal regime. Hydrobiologia 282/283: 183-195. link ↩
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Estimated value ↩