Conductivity class mm・hr−1 | Number of tests | % | % runoff |
0 - 5 | 11 | 31 | 16 |
5.1 - 10 | 8 | 23 | 29 |
10.1 - 15 | 7 | 20 | 41 |
15.1 - 20 | 4 | 11 | 50 |
20.1 - 25 | 3 | 9 | 58 |
25.1 - 30 | 2 | 6 | 64 |