Landslide monitoring at hillside residential area using GPS static and inclinometer techniques

摘要

Landslide is one of prominent geohazards that continuously affecting the tropical countries including Malaysia.Frequent occurrences of landslides at hillslopes during the heavy rainy periods have resulted in public fear for the safetyof their life and properties. For the past 25 years, many landslides have occurrences have been reported in Klang Valleyespecially at the hilly terrain residential areas. A landslide monitoring scheme is therefore very crucial and should becarried out continuously. Various studies have been conducted to monitor landslide activities such as conventionalgeotechnical and geodetic techniques. Each of these techniques has its own advantages and limitations. Therefore, thisstudy focuses on the effectiveness of the combination approach of GPS technology and inclinometer techniques forlandslide monitoring. The study area is located at residential area Section 5, Wangsa Maju, Kuala Lumpur, Malaysia.The inclinometer instrument has been placed at five (5) selected monitoring points and three (3) epochs of inclinometermeasurements were made. At the same time, the GPS observations have also been carried out for three (3) epochsseparately using GPS static techniques. This GPS network consists of four (4) control points and eleven (11) monitoringpoints. The GPS observations data were validated, processed and adjusted using two (2) adjustment software namelyTrimble Geomatic Office (TGO) version 1.6, and GPS Adjustment and Deformation Analysis (GADA). The results haveshown that the GPS technique can be implemented with inclinometer technique to detect horizontal displacements up to± 30 mm and vertical displacements less than ± 50 mm.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.