Calibration Results. According to the HDM models and WSPMS data, the calibration factors were regressed, and they are shown in Table 1. Table 1 Calibrated Factors for HDM-4 Models Section Undoweleda DBRa Climate WW EW WW EW Cracking 3806 3806 14006 19501 Faulting 0.097 0.001 0.15 0.034 Spalling 0 0.076 0 0.04 Roughness 1.368 1.089 0.859 1.070 Note:
Calibration Results. This section discusses the calibration of each model. For each model, the calibration results are presented along with a description of WSDOT data and key assumptions and observations. For each calibration group, WSPMS data were averaged for each 10-year age interval (0 – 10 years, 10 – 20 years, 20 – 30 years, and 30 – 40 years). These averaged data points were used to generate a plot that the calibrated model should approximate. Table 7 shows default and final calibration factors for the three calibration groups. Table 7 Final Calibration Factors for NCHRP 1-37A Models Calibration Factor Default for New Pavements Undoweled Undoweled – MPa DBRb,c Cracking C1 2 2.4 2.4 2.4 C2 1.22 1.45 1.45 1.45 C4 1 0.13855 0.13855 0.13855 C5 -1.68 -2.115 -2.115 -2.115 Faulting C1 1.29 0.4 0.4 0.934 C2 1.1 0.341 0.341 0.6 C3 0.001725 0.000535 0.000535 0.001725 C4 0.0008 0.000248 0.000248 0.0004 C5 250 77.5 77.5 250 C6 0.4 0.0064 0.064 0.4 C7 1.2 2.04 9.67 0.65 C8 400 400 400 400 Roughnessd C1 0.8203 0.8203 0.8203 0.8203 C2 0.4417 0.4417 0.4417 0.4417 C3 1.4929 1.4929 1.4929 1.4929 C4 25.24 25.24 25.24 25.24 Notes:
Calibration Results. In order to determine the parameters that best estimates measured concentrations of carbon tetrachloride, the model was calibrated by varying the input parameters that achieved results that most closely matched concentrations found in a well roughly 300 meters northeast of the center of the production facility. The concentration at the inflow boundary that most closely matched the concentration measured at IT9030 and IT9032 was 4,000mg/L (Table 4, Figure 3).
