Table 2 Failure rate models of temperature brackets.
From: Assessment of the impacts of climat change on water supply system pipe failures
Material | Age | \(\alpha\) | \(\beta\) | \(\sigma\) | RMSE |
|---|---|---|---|---|---|
Cast Iron | 0–25 | 0.00013 | −0.0044 | 0.067 | 0.009 |
25–50 | 0.00017 | −0.0035 | 0.047 | 0.003 | |
50–75 | 0.00016 | −0.0035 | 0.047 | 0.005 | |
75–100 | 0.00018 | −0.0035 | 0.044 | 0.005 | |
Ductile Iron | 0–25 | 0.00017 | −0.0038 | 0.045 | 0.004 |
25–50 | 0.00014 | −0.0026 | 0.049 | 0.011 | |
Unknown | 0–25 | 0.00019 | −0.0043 | 0.058 | 0.007 |
25–50 | 0.00019 | −0.0043 | 0.055 | 0.006 | |
50–75 | 0.00026 | −0.0060 | 0.073 | 0.005 | |
75–100 | 0.00027 | −0.0059 | 0.072 | 0.006 |
