Table 1 Scenario-independent and scenario-specific input parameters for the release of Imidacloprid from topically applied VMPs

Parameter not related to specific scenario

 Fraction of houses treating a dog/cat

F_{houses,treating}

0.14

0.10

7.63 E−03

2.31E−03

(–)

Equation 2

 Number of treated animals per STP

N_{dog/cat,treated/STP}

558

400

31

9

(–)

Equation 1

 Active substance used for all cats and dogs considering multiple applications per year and weight differentiation

Q_{ai,dog/cat_year}

389

81

93

12

(g/year/STP)

Additional file 1: Eq. S1a

 Frequency of use per day

F_use,spot-on/F_use,collar

3.5E−03

4.5E−03

4.2E−03

4.2E−03

(day⁻¹)

Additional file 1: Eq. S2a (spot-on)

 Amount of a.s. used maximal per day

Q_{ai,dog/cat_day_spot-on}/Q_{ai,dog/cat_day_collar}

1.38

0.36

0.39

0.048

(g/day/STP)

Equation 4

Scenario 1: Washing of pet bedding

 Fraction for abrasion

F_abr

0.20

0.20

0.01

0.01

(–)

a

 Fraction being released due to washing

F_washing

0.50

0.50

0.50

0.50

(–)

a

 Fraction released to wastewater

F_water

0.10

0.10

0.005

0.005

(–)

Equation 5

 Simultaneity factor

F_sim

0.10

0.09

0.10

0.09

(–)

a

Scenario 2: Washing/bathing of dogs

 Fraction being released due to washing/bathing

F_washing

0.50

n.r

0.20

n.r

(–)

a

 Fraction remaining in collar

F_collar

n.r

n.r

a

n.r

(–)

^b

 Fraction released to wastewater

F_{water_spot-on}/F_{water_collar}

0.50

n.r

0.08

n.r

(–)

Equations 11, 12

 Simultaneity factor

F_sim

0.13

n.r

0.13

n.r

(–)

a

Scenario 3: Walking dogs in rain

 Fraction being released due to rain

F_rain

0.20

n.r

0.02

n.r

(–)

a

 Fraction entering the same STP

F_STP

0.50

n.r

0.50

n.r

(–)

a

 Fraction released to wastewater

F_water

0.10

n.r

0.01

n.r

(–)

Equation 15

 Fraction of owners walking dogs in the rain

F_walking

0.31

n.r

0.31

n.r

(–)

a