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Evaluating problematic landslide-risked site using hydrogeophysics, isotope and conventional hydrological techniquesNormal access

Authors: L. Mejus, M.M.M. Hashim, R. Yaccup, M.I.N. Azmi, J.A.D. Daung, K. Mohamad@Mamat, M.H. Zulkurnain and T. Alkhamaiseh
Event name: EAGE-HAGI 1st Asia Pacific Meeting on Near Surface Geoscience and Engineering
Session: Poster session
Publication date: 09 April 2018
DOI: 10.3997/2214-4609.201800343
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 603.35Kb )
Price: € 20

Summary:
Slope failures, landslide and settlement of foundation (subsidence) typically do not occur spontaneously. In this context, the task of predicting the exact failure is difficult, as the point of ultimate failure is dependent on a number of factors ranging from geologic structures of the area to land use change. The first stage in any assessment of a landslide-risked area is the establishment of a reliable conceptual model of the subsurface conditions. Here we present initially results from a study conducted at Bukit Tinggi National Secondary School, Pahang, Malaysia prior to the likely occurrence of landslide activities. Our focus is to evaluate problematic subsurface of a natural landslide-risked using integrated geophysical, isotopic hydrology and conventional hydrological techniques. In this preliminary stage of the study, field screening began with minimally intrusive techniques: electrical resistivity tomography and seismic refraction surveys. The results of geophysical techniques are supported by the isotopic signature which may give a direct insight into the origin and distribution process within the hydrological system. It can be concluded that these techniques complement the conventional hydrological and hydrogeological methods employed in problematic site assessment and their use should be encouraged.


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