Sains Malaysiana 44(12)(2015): 1677–1683

Geologic Hazard Risk Assessment of Slopeland Villages in Southern

Taiwan Using Remote Sensing Techniques

(Penilaian Risiko Bahaya Geologi di Kampung-kampung Tanah Cerun

di Taiwan Selatan menggunakan Teknik Pengesanan Jarak Jauh)

SHU-RONG YANG* & YI-LUNG YEH

Department of Civil Engineering, National Pingtung University of Science and Technology, Neipu, Pingtung 91201, Taiwan (R.O.C.)

Received: 22 September 2014/Accepted: 23 June 2015

ABSTRACT

Countering the dangers associated the present extreme climate not only requires continuous improvement of local disaster prevention engineering infrastructure but also needs an enhanced understanding of the causes of the disasters. This study investigates the geologic hazard risk of 53 slopeland villages in Pingtung county of southern Taiwan. First, remote sensing (RS) techniques were utilized to interpret environmental geology and geologic hazard zonation, including dip slope, fault, landslide and debris flow. GIS map overlay analysis was used to further identify the extent of the geologic hazard zonation. As a final step, field investigation is used to comprehend geologic, topographic conditions and the geologic hazard risk specific to each locality. Based on data analysis and field investigation results, this study successfully integrates RS, GIS and GPS techniques to construct a geologic hazard risk assessment method of slopeland village. The results of this study can be used to promote support for future disaster prevention and disaster mitigation efforts.

Keywords: Geologic hazard; landslide susceptibility; remote sensing; slopeland village

ABSTRAK

Pembilang bahaya berkaitan iklim melampau semasa bukan sahaja memerlukan penambahbaikan berterusan infrastruktur kejuruteraan pencegahan bencana tempatan tetapi juga perlu peningkatan kefahaman tentang punca berlakunya bencana ini. Penyelidikan ini mengkaji risiko bahaya geologi di 53 kampung-kampung tanah cerun di daerah Pingtung selatan Taiwan. Pertama, teknik pengesanan jarak jauh (RS) digunakan untuk mentafsir geologi alam sekitar dan pengezonan bahaya geologi, termasuk aliran cerun, gelinciran, tanah runtuh dan aliran puing. Analisis bertindih peta GIS seterusnya digunakan untuk mengenal pasti tahap pengezonan bahaya geologi. Sebagai langkah akhir, kajian lapangan digunakan untuk memahami geologi, keadaan topografi dan risiko bahaya geologi khusus untuk setiap lokaliti. Berdasarkan keputusan data analisis dan hasil kajian lapangan, kajian ini berjaya menggabungkan RS, GIS dan GPS teknik untuk menghasilkan kaedah penilaian risiko bahaya geologi untuk kampung tanah cerun. Keputusan kajian ini boleh digunakan untuk meningkatkan sokongan untuk pencegahan bencana pada masa hadapan dan usaha mitigasi bencana.

Kata kunci: Bahaya geologi; kampung tanah cerun; kerentanan tanah runtuh; teknik pengesanan jarak jauh

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*Corresponding author; email: sryang@mail.npust.edu.tw