Application of Geophysical Techniques for 3D Geohazard Mapping to Delineate Cavities and Potential Sinkholes in the Northern Part of Kuala Lumpur, Malaysia

Table 1

Porosity of earth materials from the study area.

Sample material	Location	Porosity %
Soil	Football field	43.62%–50%
Un weathered limestone	Batu Cave Mountain	0.33%–4.66%
Weathered limestone	Batu Cave Mountain	10.7%–24.04%