The residual soil layer is relatively thin at zones where weathered granite dominates the slope face of the failure mass. These zones are continuous as they have been detected in both the east-west as well as the north-south lines. The existence of low resistivity zones within the granite body is interpreted as highly fractured, water conducting zones.
A granite body was detected at the central part of the east line and is nearest to the ground surface along FH02. The parallel lines are FH01, FH02, and FH03, while the lines FH04 and FH05 are perpendicular. The study involves three slope parallel survey lines and two lines perpendicular to the slope face. This study reports the findings of resistivity surveys which were conducted at the initiation area of debris flow at KM 9, Fraser’s Hill Gap road (FT148).
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