Facilitated transport of pesticides
        
TABLE 3.2.
PARAMETERS DESCRIBING LINEAR RELATIONSHIPS BETWEEN TURBIDITY (IN NTU) AND HERBICIDE
CONCENTRATIONS (PENDIMETHALIN: CP OR IOXYNIL: CI), AND BETWEEN TURBIDITY AND CONCENTRATION OF
SOIL PARTICLES (CS): C = α.·NTU+ β. N=NUMBER OF OBSERVATIONS, r2=COEFFICIENT OF DETERMINATION.
TABEL 3.2.
BESKRIVELSE AF LINEÆR RELATION MELLEM TURBIDITET (I NTU) OG HERBICID KONCENTRATIONER
(PENDIMETHALIN: CP OG IOXYNIL: CI), OG MELLEM TURBIDITET OG KONCENTRATION AF JORD-PARTIKLER (CS):
C = α.·NTU+ β. N=ANTAL OBSERVATIONER, r2=KORRELATIONSKOEFFICIENT.
Pesticide – Turbidity
Dependent
variable
Season
Event
No.
Concentration
range, µg l-1
n
r2
α†
10-2 µg l-1 NTU-
1
β†
10-2 µg/l
Pendi-
methalin, Cp
1999/00
1
0.00-12.6
12
0.94
3.2 (0.3) ***
-3 (38) ns
2
0.00-2.3
12
0.62
1.9 (0.5) **
-13 (29) ns
3
0.00-0.30
11
0.45
0.19 (0.07)
*
0 (4) ns
2000/01
1
0.05-0.91
7
0.98
0.74 (0.05) ***
11 (3)
*
2
0.05-3.0
8
0.91
0.74 (0.10) ***
-9 (19) ns
3
0.09-1.5
6
0.74
0.27 (0.08) *
20 (18) ns
4
0.00-0.08
6
0.78
0.06 (0.02) *
1 (1) ns
Ioxynil, Ci
2000/01
1
0.00-0.27
7
0.13
-0.09 (0.13) ns
10 (6) ns
2
0.00-0.51
8
0.30
0.08 (0.05) ns
7 (10) ns
3
0.00-0.24
6
0.10
-0.02 (0.02) ns
7 (5) ns
4
0.00-0.00
6
-
0.00 (0.00)
0 (0)
Particle concentration – turbidity
Dependent
variable
Concentration range,
mg l-1
n
r2
α†
mg l-1 NTU-1
β†
mg l-1
Particle
conc., Cs
0-685
77
0.95
0.87 (0.02) ***
-3.3 (3.3)
ns
†: Standard errors in (). Suffix shows the result of t-test for the hypothesis:
parameter=0. ns: non significant; *, ** or ***: significant at the 95, 99 or 99.9 % level.
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