Research Article
Developing Statewide Optimal RWIS Density Guidelines Using Space-Time Semivariogram Models
Table 1
Descriptive statistics of RST for the study area (winter months of 2016-2017).
| | States | CO | IA | KS | MN | OH | KY | NE | WY |
| | Oct-16 | Min | -6.7 | -1.1 | 0.8 | -2.6 | -1.5 | -7.2 | -6.2 | -9.4 | | Average | 15.5 | 16.9 | 20.8 | 12.6 | 18.3 | 20.0 | 16.7 | 11.9 | | Max | 37.8 | 41.5 | 46.2 | 41.0 | 47.0 | 39.5 | 44.7 | 45.1 | | StDev | 9.0 | 6.9 | 8.2 | 7.0 | 6.9 | 6.9 | 7.7 | 8.1 |
| | Nov-16 | Min | -29.8 | -8.6 | -7.6 | -9.9 | -24.0 | — | -12.5 | -15.9 | | Average | 7.6 | 9.5 | 12.5 | 6.0 | 10.1 | — | 8.7 | 5.0 | | Max | 46.9 | 38.3 | 39.5 | 30.2 | 35.5 | — | 34.4 | 30.6 | | StDev | 9.2 | 7.1 | 7.8 | 6.2 | 6.3 | — | 8.0 | 8.0 |
| | Dec-16 | Min | -22.6 | -29.5 | -24.9 | -29.9 | -19.6 | -10.4 | -28.1 | -29.5 | | Average | -1.5 | -2.7 | 0.8 | -6.6 | 1.7 | 4.5 | -3.3 | -5.4 | | Max | 26.6 | 18.8 | 22.9 | 11.7 | 51.5 | 21.1 | 17.8 | 17.6 | | StDev | 7.4 | 6.4 | 7.3 | 6.8 | 5.7 | 4.8 | 6.2 | 6.3 |
| | Jan-17 | Min | -26.9 | -24.0 | -20.9 | -30.3 | -19.1 | -17.2 | -26.9 | -29.1 | | Average | -0.6 | -2.1 | 2.7 | -6.8 | 2.9 | 6.4 | -2.5 | -5.5 | | Max | 37.8 | 19.6 | 28.5 | 14.2 | 25.5 | 21.8 | 19.9 | 21.0 | | StDev | 7.7 | 6.0 | 7.4 | 7.9 | 6.3 | 5.1 | 6.3 | 6.9 |
| | Feb-17 | Min | -17.7 | -15.9 | -10.8 | -26.0 | -22.7 | -9.6 | -19.4 | -23.4 | | Average | 6.0 | 5.6 | 9.8 | -1.5 | 7.1 | 9.3 | 4.4 | 0.9 | | Max | 37.7 | 32.4 | 38.6 | 27.2 | 34.5 | 30.4 | 36.1 | 30.7 | | StDev | 8.9 | 8.2 | 9.0 | 8.1 | 7.3 | 5.9 | 8.0 | 7.7 |
| | Mar-17 | Min | -17.2 | -16.4 | -7.3 | -22.0 | -10.8 | -8.4 | -11.5 | -17.5 | | Average | 11.0 | 7.0 | 13.9 | 2.5 | 9.0 | 12.1 | 9.4 | 7.2 | | Max | 38.3 | 36.1 | 48.7 | 36.3 | 36.0 | 31.7 | 43.7 | 39.5 | | StDev | 10.2 | 7.6 | 9.5 | 8.7 | 7.1 | 6.5 | 8.3 | 9.3 |
|
|
