102 Part II: Multi-state deterioration modelling 0 5000 10000 15000 Count Mixed Rain Waste 62.66% 20.92% 16.42% 0 10000 20000 30000 Count Transport Infiltration Culvert Drain 98.19% 1.60% 0.14% 0.07% 0 10000 20000 Count Round Ovoid MouthProfile Rectangular Mailbox 94.45% 5.43% 0.06% 0.05% 0.01% 0 10000 20000 30000 Count Gravity Mechanic 99.97% 0.03% (a) Content type (c)Shape (e)Width (g) Construction year (h)Length (f)Height (d) System type (b) Function 1919 1943 1967 1991 2016 Year 0 800 1600 2400 Counts 1 2 Width (m) 0 2500 5000 7500 10000 Counts 1 2 Height (m) 0 2000 4000 6000 Counts 76 152 229 305 Length(m) 0 2000 4000 6000 Counts Figure II.3: Categorical and numerical variables in the Breda case study, Netherlands (total 25,594 pipes). (a)-(d) categorical variables; (e)-(h) numerical variables.
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