Class

Geological Unit

Erosion degree

Drainage Density (Km/Km²)

Rating value

1

E_va

Very severe

4.34

10

2

E_a

Severe

1.76

8

3

O_r

Very severe

2.72

10

4

gr

Very severe

4.44

10

5

Qpl^c

Very severe

5.37

10

6

Qpl^m

Very severe

5.49

10

7

Q^t2

Very severe

3.04

10

8

Q^al

Very severe

13.85

10