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Prediction & Control of Landslides

 

Landslip Study : The aim of the study is to attempt the landslide prone zone in the, Ooty region, Tamilnadu, India. The survey was carried out using GD-10 Series, multi-core cables & electrodes. Survey is assigned with Wenner configuration. The aim of the survey is to identify the landslide prone zone .The study reveals that the investigation area is highly vulnerable to landslide which is evident from the low and high resistivity zone noticed in the study area. The water body with loose sand is identified from low resistivity value, highly weathered zone indicates the presence of charnockite and compact charnokite gives high resistivity value in the study.

Interpretation for the ERT Line I :The Elevation variation in pseudo-section ranges from 1060m to 1100m. The Top layer constitutes Lateritic soil with resistivity ranges from 49.4 ohm m to 68.8 ohm m. The Intermediate layer of Weathered zone of  Charnockite rocks  with resistivity  ranges from 128 ohm m to 902 ohm .The  bottom layer with  resistivity  ranges from 902 ohm m to 5010 ohm m, indicates the presence of Garnetiferous Charnockite.

Interpretation for the ERT Line II : In the second profile , the pseudo-section denotes that the top layer is covered by Mud with highly weathered soil in a width of 125m and in depth of 10m, the resistivity ranges from 12 ohm m to 53.9 ohm m. The Intermediate layer of weathered zone with resistivity ranges from 73.9 ohm m to 112 ohm m .The hard and compact garnetiferous rock shows the high resistivity ranges from 235ohm m to 1040 ohm m.

Interpretation for the ERT Line III : In the Third profile ,shows the Elevation variation in pseudo-section ranges from 1078m to 1058m .The Top layer constitute Lateritic soil with high saturation of water ,with resistivity ranges from 12 ohm m to 24.8 ohm m. The bottom layer with resistivity ranges from 25.2 ohm m to 106 ohm m, indicates the presence of Garnetiferous Charnockite .