Geophysical surveys to study landslide at Taman Kuari Bukit Mertajam Penang

Zuhar Zahir Tuan Harith, . and Rosli Saad, . and Mohd Nawawi Mohd Nordin, . (2003) Geophysical surveys to study landslide at Taman Kuari Bukit Mertajam Penang. [Proceedings Paper]

Landslide is one of the major problem in Malaysia especially in a hilly area. The occurences of landslide are often related to the slope condition the existence of boulders and the amount of rainfall. The presence of boulders and ground water can be detected using several geophysical methods. The purpose of this project is to map the resistivity of hte subsurface and determined depth to bedrock and existing of boulder using Refraction Seismic Survey and 2-D Resistivity Imaging Survey at Taman Kuari Bukit Mertajam Penang. Two resistivity lines each 80 meters in length were carried out parrallel to each other along the slop of the area study. Two seismic surveys on the same lines were also carried out for comparison. The resistivity value of the area range from 50 ohm-m to more than 10 000 ohm-m. The high resistivity is mainly due to granite bedrock. The depth of the bedrock is very shallow between 2-3 meters except for some area where the depth to bedrock is deeper. The seismic section on the other hand shows two layers with the velocity of the top layer being 550 m/s and the velocity of the second layer range between 1800 to 2 200 m/s. This can be interpreted that the top layer is made up of highly weathered material and the second layer as granite. The depth to bedrock varies from 2 to 6 meters. The surveys done shows that the depth to bedrock is very shallow of about 2-3 meters. The bedrock is made up of granite due to the high resistivity value and high velocity.

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Abstract

Landslide is one of the major problem in Malaysia especially in a hilly area. The occurences of landslide are often related to the slope condition the existence of boulders and the amount of rainfall. The presence of boulders and ground water can be detected using several geophysical methods. The purpose of this project is to map the resistivity of hte subsurface and determined depth to bedrock and existing of boulder using Refraction Seismic Survey and 2-D Resistivity Imaging Survey at Taman Kuari Bukit Mertajam Penang. Two resistivity lines each 80 meters in length were carried out parrallel to each other along the slop of the area study. Two seismic surveys on the same lines were also carried out for comparison. The resistivity value of the area range from 50 ohm-m to more than 10 000 ohm-m. The high resistivity is mainly due to granite bedrock. The depth of the bedrock is very shallow between 2-3 meters except for some area where the depth to bedrock is deeper. The seismic section on the other hand shows two layers with the velocity of the top layer being 550 m/s and the velocity of the second layer range between 1800 to 2 200 m/s. This can be interpreted that the top layer is made up of highly weathered material and the second layer as granite. The depth to bedrock varies from 2 to 6 meters. The surveys done shows that the depth to bedrock is very shallow of about 2-3 meters. The bedrock is made up of granite due to the high resistivity value and high velocity.

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Item Type:	Proceedings Paper
AGROVOC Term:	LANDSLIDES
AGROVOC Term:	SOIL SURVEYS
AGROVOC Term:	METHODS
AGROVOC Term:	BOULDER CLAY SOILS
AGROVOC Term:	SOIL TYPES
AGROVOC Term:	ENVIRONMENTAL IMPACT
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/16146

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