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| Titel |
Tropical Airborne LiDAR for Landslide Assessment in Malaysia: a technical perspective |
| VerfasserIn |
Mohamad Abd Manap, Khamarrul Azhari Razak, Zakaria Mohamad, Azhari Ahmad, Ferdaus Ahmad, Mazlan Mohamad Zin, Qalam A'zad Rosle |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250107801
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| Publikation (Nr.) |
 EGU/EGU2015-7515.pdf |
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| Zusammenfassung |
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European Geosciences Union (EGU) General Assembly 2015
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12-17 April 2015
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Vienna, Austria
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\begin{center}
\textbf{TROPICAL AIRBORNE LiDAR FOR LANDSLIDE ASSESSMENT IN MALAYSIA: A
TECHNICAL PERSPECTIVE}
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\begin{center}
Mohamad Abd Manap$^{1}$, Khamarrul Azahari Razak$^{2}$, Zakaria Mohamad$^{
3}$, Azhari Ahmad$^{1}$, Ferdaus Ahmad$^{4}$, Mazlan Mohamad Zin$^{5}$ and
Qalam A'zad Rosle$^{3}$
\end{center}
\begin{center}
$^{1}$\textit{Minerals and Geoscience Department Malaysia (Technical Services Section), Ministry of Natural Resources and Environment Malaysia, Jalan Sultan Azlan Shah, Peti Surat 1015, 30820, Perak, Malaysia, Tel:+605 5406000, Fax: +605 5406100, Email: mohdmanap@jmg.gov.my,azhari@jmg.gov.my }
\end{center}
\begin{center}
$^{2}$\textit{UTM Razak School of Engineering and Advanced Technology, Universiti Teknologi Malaysia, 54100, Jalan Semarak, Kuala Lumpur, Malaysia}
\end{center}
\begin{center}
\textit{Tel. +6019-3649495, Fax. +603-26934844, Email: khamarrul.kl@utm.my}
\end{center}
\begin{center}
$^{3}$\textit{Minerals and Geoscience Department Malaysia (Selangor {\&} Wilayah Persekutuan), Ministry of Natural Resources and Environment Malaysia, 40000, Shah Alam, Selangor, Malaysia, Malaysia, Tel:+605 5406000, Fax: +605 5406100, Email: zakaria@jmg.gov.my, qalam@jmg.gov.my }
\end{center}
\begin{center}
$^{4}$\textit{Minerals and Geoscience Department Malaysia (Headquarters), Ministry of Natural Resources and Environment Malaysia, 19-22}$^{th}$\textit{ Bangunan Tabung Haji, Jalan Tun Razak, 50658, Kuala Lumpur, Malaysia, Malaysia, Tel:+603 21611033, Fax: +603 21611036, email: ferdaus@jmg.gov.my }
\end{center}
\begin{center}
$^{5}$\textit{Minerals and Geoscience Department Malaysia (Pahang), Ministry of Natural Resources and Environment Malaysia, Jalan 1M4/1, Bandar Indera Mahkota, 25640, Kuantan, Pahang, Malaysia, Tel:+609 5733244, Fax: +609 5733249, email: mazlanmz@jmg.gov.my }
\end{center}
\textbf{Abstract }
Malaysia has faced a substantial number of landslide events every year.
Cameron Highlands, Pahang is one of the badly areas affected by slope
failures characterized by extreme climate, rugged topographic and weathered
geological structures in a tropical environment. A high frequency of
landslide occurrence in the hilly areas is predominantly due to the
geological materials, tropical monsoon seasons and uncontrolled agricultural
activities. Therefore the Government of Malaysia through the Prime Minister
Department has allocated a special budget to conduct national level hazard
and risk mapping project through Minerals and Geoscience Department
Malaysia, the Ministry of Natural Resources and Environment.
The primary aim of this project is to provide slope hazard risk information
for a better slope management in Malaysia. In addition this project will
establish national infrastructure for geospatial information on the
geological terrain and slope by emphasizing the disaster risk throughout the
country.
The areas of interest are located in the three different selected areas i.e.
Cameron Highlands (275 square kilometers), Ipoh (200 square kilometers) and
Cheras Kajang -- Batang kali (650 square kilometers). These areas are
selected based on National Slope Master Plan (2009 -- 2023) that endorsed by
Malaysia Government Cabinet.
The national hazard and risk mapping project includes six parts of major
tasks: (1) desk study and mobilization, (2) airborne LiDAR data acquisition
and analysis, (3) field data acquisition and verification, (4) hazard and
risk for natural terrain, (5) hazard and risk analysis for man-made slope
and (6) Man-made slope mitigation/preventive measures. The project was
authorized in September, 2014 and will be ended in March, 2016.
In this paper, the main focus is to evaluate the suitability of integrated
capability of airborne- and terrestrial LiDAR data acquisition and analysis,
and also digital photography for regional landslide assessment. The results
of the study produced 4 point/m$^{2}$ density of LiDAR data point cloud,
very detailed DEM and DSM of 0.5 m grid and high resolution digital aerial
photograph of 7 cm grid, as well as an inventory of the landslide. A
reliable landslide inventory has been critically developed with the input of
LIDAR derivatives data and field investigation emphasizing on its crucial
attributes, e.g., the landslide types, depth, style-, states and
distribution of landslide activity.
As a result of this study, guidelines and recommendation on the technical
aspect of LIDAR-derived landslide assessment are explicitly presented and
critically discussed. The finding of this project will be very useful for
future planning of slope management, sustainable land use planning and
development by related government agencies and local authorities in
Malaysia.
\textbf{\textit{Keywords}}\textbf{: }Airborne LiDAR; landslide assessment;
hazard and risk analysis; 3D point cloud density; slope failures; Malaysia |
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