Supplemental Information
Predicting phosphorus losses with the model PLEASE on a local scale in
Denmark and the Netherlands
Caroline van der Salm, Remi Dupas, Ruth Grant, Goswin Heckrath, Bo V. Iversen, Brian
Kronvang, Clémentine Levi , Gitte H. Rubaek and Oscar F. Schoumans
Supplemental Fig. S1. Location of the sites in the Netherlands (left) and Denmark (right). For
abbreviations see Supplemental Tables S1 and S2.
Supplemental Table S1. Main characteristics of the sites with measured concentrations only.
Location
Texture
Land-use
Artificial drainage
MHG1 MLG2 DPS
Measurements4
m
m
%
5
Dairyman network (NL)
Eibergen (Ei)
Sand
Grass
Pipe drains (0.85 m)
0.1
1.5
36
Cpd (16)
Nieuweroord (Nw) Sand
Grass
Pipe drains (0.95 m)
0.2
1.2
28
Cpd (16)
Ysselsteyn (Ys)
Sand
Grass
Pipe drains (0.8 m)
0.6
1.5
27
Cpd (16)
Zeewolde (Zw)
Clay
Grass
Pipe drains (1.0 m)
0.7
1.5
19
Cpd (16)
Haskerdijken (Hd) Clay on peat
Grass
Pipe drains (0.55 m)
0.1
0.9
14
Cpd (16)
Bedum (Bd)
Heavy clay
Grass
Pipe drains (0.95 m)
0.6
1.0
15
Cpd (16)
NOVANA network (DK)5,6
HR 2
Sandy clay to silty clay Arable
None
1.4
3.2
23
Cly (10), Cgw(7)
HR 4
Sandy clay to silty clay Arable
None
0.7
2.6
30
Cly (10), Cgw(7)
BB 1
Sand
Arable
None
0.8
1.5
18
Cly (10), Cgw(7)
BB 2
Sandy clay to sand
Arable
None
0.3
1.1
16
Cly (10), Cgw(7)
BB 3
Sand
Arable
None
1.0
2.2
12
Cly (10), Cgw(7)
BB 4
Sand
Arable
None
1.9
2.9
20
Cly (10), Cgw(7)
BB 5
Sand
Fallow
None
1.2
1.7
16
Cly (10), Cgw(7)
BB 7
Sand
Arable
None
1.1
2.3
19
Cly (10), Cgw(7)
Other sites (DK)5
Hedevang (Hv)
Sand
Arable
None
0.9
1.6
32
Cly (4), Cgw (4)
Lundgaard 1 (L1) Coarse sand
Grass
None
0.7
1.1
34
Cly (4), Cgw (4)
Lundgaard 2 (L2) Coarse sand
Grass
None
0.3
0.9
44
Cly (4), Cgw (4)
Votkaer (Vk)
Coarse sand
Arable
None
0.5
1.0
22
Cly (4), Cgw (4)
Staby (Sb)
Sand
Arable
None
0.7
1.6
34
Cly (4), Cgw (4)
1
2
MHG = Mean Highest Groundwater level, MLG = Mean Lowest Groundwater level
3
DPS = degree of phosphate saturation (Pox/(0.5*(Al+Fe)ox) up to MHG
4
Cpd = concentrations in drain pipes, Cly = concentrations in suction cups and Cgw = concentrations in groundwater, number of sampling points is
indicated between brackets. For the sites in the Dairyman network and the NOVANA network samples were mixed before analysis (no
standard deviations available)
5
NL= The Netherlands and DK= Denmark
6
HR = Højvads Rende catchment and BB = Bolbro Bæk catchment
Supplemental Table S2. Main characteristics of the sites with P fluxes and concentrations.
Location
Texture
Land-use
Artificial drainage
MHG1
m
5,6
NOVANA network (DK)
HR 3
Sandy clay to silty clay Arable
Pipe drains (1.8 m) 0.9
MLG2
m
DPS3 Measurements4
%
3.2
15
HR 5
Sandy clay to sandy till
Arable
Pipe drains (1.6 m)
0.8
2.1
18
HR 6
Sandy clay to silty clay
Arable
Pipe drains (1.3 m)
0.5
2.0
67
HR 7
Clay to silty clay
Arable
Pipe drains (1.3 m)
0.8
2.5
15
DOVE sites (NL)5
Den Pol (Dp)
Vlietpolder (Vp)
Waardenburg (Wb)
Sand
Peat
Heavy clay
Grass
Grass
Grass
None
None
Pipe drains (0.55
m) and trenches
0.2
0.0
0.2
1.2
0.6
1.2
47
214
7
FTP(1), FMRP(1), Cly(10), Cgw
(7)
FTP(1), FMRP(1), Cly(10), Cgw
(7)
FTP(1), FMRP(1), Cly(10), Cgw
(7)
FTP(1), FMRP(1), Cly(10), Cgw
(7)
FTP(1), Cly (30)
FTP(1), FMRP(1)
FTP(2), FMRP(2), Cgw(2)
Bufferstrip sites (NL)5
Beltrum (Bl)
Sand
Arable
None
0.4-0.6 1.3-1.5 20
FTP(1), FMRP(1), Cly(5)
Winterswijk (Ww)
Sand on clay
Grass
None
0.25
2.0
49
FTP(1), FMRP(1), Cly(5)
Loon op Zand (Lz)
Sand
Grass
None
0.6
1.8
35
FTP(1), FMRP(1), Cly(5)
Lelystad (Ll)
Sandy clay loam
Arable
Pipe drains
0.7
1.2
19
FTP(1), FMRP(1), Cly(5)
Zegveld (Zv)
Peat
Grass
None
0.2-0.3 0.8
17
FTP(1), FMRP(1), Cly(5)
1
MHG = Mean Highest Groundwater level
2
MLG = Mean Lowest Groundwater level
3
DPS = degree of phosphate saturation (Pox/(0.5*(Al+Fe)ox) up to MHG
4
FTP = fluxes of Total-P, FMRP = fluxes of MRP, Cpd = concentrations in drain pipes, Cly = concentrations in suction cups and Cgw =
concentrations in groundwater, number of sampling points is indicated between brackets. For the sites in the NOVANA network samples
were mixed before analysis (no standard deviations available)
5
NL= The Netherlands and DK= Denmark
6
HR = Højvads Rende catchment