Table 2. Correlation results for each method.
Discharge capacity and estimated population | Discharge capacity and population density | Discharge capacity and sewershed area | |||||
---|---|---|---|---|---|---|---|
Method | Median discharge capacity (mgd) | Pearson correlation | P value | Pearson correlation | P value | Pearson correlation | P value |
Provided by treatment plant/municipality/county | 0.36 | 0.83 | 0 | 0.439 | 0 | 0.826 | 0 |
Parcel digitized no description | 0.52 | 0.876 | 0 | 0.514 | 0 | 0.853 | 0 |
Parcel digitized from description | 0.99 | 0.974 | 0 | 0.615 | 0.005 | 0.853 | 0 |
Digitized from physical map (JPEG/PDF) | 10 | 0.972 | 0 | 0.673 | 0 | 0.698 | 0 |
Digitized from manhole/sewer main shapefile | 0.4 | 0.707 | 0 | 0.195 | 0.27 | 0.668 | 0 |
Parcel digitized from DANC records | 0.1 | 0.897 | 0 | 0.544 | 0 | 0.822 | 0 |