Layer Hydrogeologic Unit Label Unit Range of Thickness(m) Lithologic and Hydrogeologic Characteristics
1. The Upper Saprolite with Low Permeability
The Saprock Aquifer with High Permeability

USLP

SAHP

 ≈≤0.5-5

≈≤5-30		 A convertible low permeability unit consisting of lateritic, schist and slightly yellow clay to moderately sandstone.
Further down there is a noticeable high permeability, consisting of mostly of sand and gravel with some silt and meta sedimentary rocks
2. Basement Complex BC ≈≤70 The unit consists of weathered, fractured convertible aquifer and fresh granite.
Table 3: Aquifer units and their lithological description used as groundwater model layers.