| c |
Concentration value |
μg/l |
| ccal |
Calculated concentration value |
μg/l |
| cd |
Dissolved substance concentration |
μg/l |
| cd,sed |
Dissolved substance concentration in the sediment pore water |
μg/l |
| cd,wc |
Dissolved substance concentration in the water column |
μg/l |
| cs |
Concentration of sorbed substance |
μg/kg |
| cSMLd |
Dissolved concentration in the surface micro layer |
μg/l |
| ctot |
Total (dissolved + absorbed) substance concentration |
μg/l |
| ctot,wc |
Total substance concentration in the water column |
μg/l |
| D |
Diffusion coefficient |
m2/h |
| Dlayer |
Diffusion coefficient in laminar layer (water column/sediment) |
m2/h |
| dosage |
Amount sprayed per m2 |
μg/m2 |
| Dsed |
Diffusion coefficient for sediment pore diffusion |
m2/h |
| DSML |
Diffusion coefficient in the surface micro layer |
m2/h |
| DT50 |
Half life time for degradation |
d |
| Dgr |
Rate of degradation |
μg/(l h) |
| f |
Probability density function |
- |
| h |
Probability density function for both variability and uncertainty |
- |
| k |
First order degradation coefficient |
(1/h) |
| Kom |
Adsorption coefficient in relation to organic matter |
l/kg |
| Kd |
Adsorption coefficient in relation to dry bulk concentration |
l/kg |
| kdsus |
Adsorption coefficient between water and sedimenting solids |
kg/l |
| keff |
Effective 1. order removal constant |
1/h |
| Klayer |
Resistance of the laminar layer (water column/sediment) |
m |
| Kow |
Octanol/water distribution coefficient |
- |
| kvol |
First order volatilization rate from water surface into the air |
l/(m2h) |
| L1 |
Vertical length scale for substance (S1) diffusion in sediment |
m |
| L2 |
Vertical length scale for substance (S2) diffusion in sediment |
m |
| Ldosage |
The thickness of the sprayed layer on the water surface |
m |
| Lh |
Vertical length scale for sediment surface heterogeneity |
m |
| Llayer |
Thickness of laminar layer between water column and sediment |
m |
| LSML |
Thickness of the SML |
m |
| Lwc |
Water depth (equal water column high) |
m |
| M |
Number of comparisons in the objective function O |
- |
| MW |
Molecular weight |
g/mol |
| N |
Number of parameters in the density distribution |
- |
| n |
Number of replicates |
- |
| O |
Objective function for parameter calibration |
- |
 |
Parameter vector in probability density function |
- |
| Psat |
Vapor pressure |
Pa |
| R |
Retention factor i form of the ratio between cd and ctot |
- |
| Rate |
The substance uptake rate between water column and sediment |
μg/(m2h) |
| Rmacro,wc |
Retention factor in the water column due to macroscopic surfaces |
- |
| Rsed |
Retention factor in the sediment |
- |
| RSML |
Retention factor in the surface micro layer |
- |
| R,sed |
Retention factor in the sediment pore water due to the pore walls |
- |
| Rsus,wc |
Retention factor in the water column caused by suspended solids |
- |
| S1 |
Substance 1 |
μg/l |
| S2 |
Substance 2 |
μg/l |
| sed |
Rate of removed substance by sedimentation per unit bottom area |
μg/(m2 h) |
| Sw |
Solubility |
μg/l |
| t |
Time since application of pesticide on the water surface |
h |
| vola |
Volatilization rate from water surface into the air |
μg/(m2 h) |
| vsed |
Sedimentation flux of suspended solids |
Kg/(m2h) |
| x |
Downward distance from water or sediment surface |
m |
 |
Density function for each element in the parameter vector ( ) |
- |
Greek letters |
| μ |
True concentration mean value |
μg/l |
| μest |
Estimated concentration mean value |
μg/l |
| σ |
Standard deviation for concentration measurements |
μg/l |
| σhigh |
Standard deviation for concentration measurements related for high dosage |
μg/l |
| σlow |
Standard deviation for concentration measurements related for low dosage |
μg/l |
| θ |
Volume fraction of water |
- |
| ρ |
Dry bulk density |
kg/l |
 |
Parameter vectors for the probability density functions |
- |