Table 1

Evaluation of conventional and novel water infrastructure in the urban model area in Lünen

 CriterionIndicatorWeight (%)Conventio­nali.WET
1. Ecological criteria 22.0 0.49 0.63 
1.1 Nutrient burden N
P 		1.29
1.29 		0.52
0.69 		0.57
0.73 
1.2 Ecotoxic substances/water Cu
Zn
Diclofenac
Terbutryn 		0.77
0.77
0.77
0.77 		0.20
0.19
0.39
0.17 		0.37
0.29
0.39
0.17 
1.3 Oxygen-consuming substances BOD 2.62 0.55 0.60 
1.4 Ecotoxic substances/ soil Cadmium
Lead
PAK 		0.95
0.95
0.95 		1.00
1.00
1.00 		1.10
0.99
0.99 
1.5 Greenhouse gas emission GHG equivalents 2.44 0.51 0.98 
1.6 Effect on micro climate Cold-air lanes 1.91 0.50 0.50 
1.7 Resource use Energy, operating materials 2.52 0.50 0.76 
1.8 Resource recovery P
N
H2O
C (organic) 		0.02
0.03
2.28
0.05 		0.00
0.00
0.00
0.00 		0.01
0.01
0.27
0.00 
1.9 Land use Soil sealing 1.84 0.50 0.50 
2. Safety-relevant criteria 26.7 0.90 0.90 
2.1a Germ infestation/hygiene Total bacteria count, coliform CFU 22.8 0.90 0.90 
2.1b Smell/turbidity TON, NTU 3.92 0.90 0.87 
3. Economic criteria 16.4 0.46 0.52 
3.1 (Net) costs Investment and operation 8.90 0.42 0.46 
3.2 Flexibility, system's readiness for change Depreciated cost
Useful life 		3.74
3.74 		1.00
0.00 		1.00
0.19 
4. Social criteria 16.0 0.74 0.77 
4.1 Convenience (service quality) Expenditure of time 5.18 0.90 0.90 
4.2 Economic burden Special cost burden 6.28 0.50 0.56 
4.3 Nuisance Number of sensoric media 4.49 0.90 0.90 
5. Technical criteria 18.8 0.66 0.70 
5.1 Vulnerability to damage Spare capacity
Damage potential
Knowhow availability 		1.53
1.53
1.53 		0.50
0.50
0.80 		0.80
0.60
0.60 
5.2 Effect of system failure Share of BOD in river/lake 4.05 0.83 0.93 
5.3 Supply of firefighting water Share of safe supply 3.89 1.00 1.00 
5.4 Flexibility w/resp. to changing conditions Modularity 3.65 0.30 0.40 
5.5 Dependence Number/intensity 2.61 0.50 0.40 
Total 100 0.67 0.72 
 CriterionIndicatorWeight (%)Conventio­nali.WET
1. Ecological criteria 22.0 0.49 0.63 
1.1 Nutrient burden N
P 		1.29
1.29 		0.52
0.69 		0.57
0.73 
1.2 Ecotoxic substances/water Cu
Zn
Diclofenac
Terbutryn 		0.77
0.77
0.77
0.77 		0.20
0.19
0.39
0.17 		0.37
0.29
0.39
0.17 
1.3 Oxygen-consuming substances BOD 2.62 0.55 0.60 
1.4 Ecotoxic substances/ soil Cadmium
Lead
PAK 		0.95
0.95
0.95 		1.00
1.00
1.00 		1.10
0.99
0.99 
1.5 Greenhouse gas emission GHG equivalents 2.44 0.51 0.98 
1.6 Effect on micro climate Cold-air lanes 1.91 0.50 0.50 
1.7 Resource use Energy, operating materials 2.52 0.50 0.76 
1.8 Resource recovery P
N
H2O
C (organic) 		0.02
0.03
2.28
0.05 		0.00
0.00
0.00
0.00 		0.01
0.01
0.27
0.00 
1.9 Land use Soil sealing 1.84 0.50 0.50 
2. Safety-relevant criteria 26.7 0.90 0.90 
2.1a Germ infestation/hygiene Total bacteria count, coliform CFU 22.8 0.90 0.90 
2.1b Smell/turbidity TON, NTU 3.92 0.90 0.87 
3. Economic criteria 16.4 0.46 0.52 
3.1 (Net) costs Investment and operation 8.90 0.42 0.46 
3.2 Flexibility, system's readiness for change Depreciated cost
Useful life 		3.74
3.74 		1.00
0.00 		1.00
0.19 
4. Social criteria 16.0 0.74 0.77 
4.1 Convenience (service quality) Expenditure of time 5.18 0.90 0.90 
4.2 Economic burden Special cost burden 6.28 0.50 0.56 
4.3 Nuisance Number of sensoric media 4.49 0.90 0.90 
5. Technical criteria 18.8 0.66 0.70 
5.1 Vulnerability to damage Spare capacity
Damage potential
Knowhow availability 		1.53
1.53
1.53 		0.50
0.50
0.80 		0.80
0.60
0.60 
5.2 Effect of system failure Share of BOD in river/lake 4.05 0.83 0.93 
5.3 Supply of firefighting water Share of safe supply 3.89 1.00 1.00 
5.4 Flexibility w/resp. to changing conditions Modularity 3.65 0.30 0.40 
5.5 Dependence Number/intensity 2.61 0.50 0.40 
Total 100 0.67 0.72 
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