Grading

Total stations

Percentage (%)

Average stations

≥20 (mm/h)

3492

100

97

20 - 30 (mm/h)

2525

72.31

70.14

30 - 40 (mm/h)

672

19.24

18.67

40 - 50 (mm/h)

193

5.53

5.36

≥50 (mm/h)

102

2.92

2.83