Loam

5

Silty Loam

4

Clay Loam

3

Muck

2

Non-shrinking and Non-aggregated Clay

1

Topography (T)

weight: 1

Slope (%)

Rate

0 - 2

10

2 - 6

9

6 - 12

5

12 - 18

3

>18

1

Impact of the vadose zone media (I)

weight: 5

Media

Rate

Confining Layer

1

Silt/Clay

3

Shale

3

Limestone

6

Sandstone

6

Bedded Limestone, Sandstone, Shale

6

Sand and Gravel with significant Silt and Clay

6

Metamorphic/Igneous

4

Sand and Gravel

8

Basalt

9

Fissured or karstic Limestone

10

Hydraulic Conductivity (C)

weight: 3

Range (m/s)

Rate

4.716 × 10−7 - 4.716 × 10−5

1

4.716 × 10−5 - 1.41 × 10−4

2

1.41 × 10−4 - 3.3 × 10−4

4

3.3 × 10−4 - 4.716 × 10−4

6

4.716 × 10−4 - 9.43 × 10−4

8

>9.43 × 10−4

9

Land-use (L)

weight: 5

Land-Use

Rate

bare rocks

5

agricultural areas

8

urban areas

8