Table 4 Porosity values (applied in base case scenarios).

From: Groundwater contamination modelling in Ayad River Basin, Udaipur

S. no

Unit

Porosity, pt

S. no

Unit

Porosity, pt

 

Unconsolidated deposits

  

Rocks

 

1

Gravel

0.25–0.40

1

Fractured basalt

0.05–0.50

2

Sand

0.25–0.50

2

Limestone

0.05–0.50

3

Silt

0.35–0.50

3

Sandstone

0.05–0.30

4

Clay

0.40–0.70

4

Dolomite

0.00–0.20

5

Shale

0.00–0.10

6

Fractured crystalline rock

0.00–0.10

7

Dense crystalline rock

0.00–0.05

  1. Source: Freeze et al.,94.