Application of thermal infrared remote sensing for detecting slopes with high landslide-vulnerability
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- KOSUGI Ken'ichirou
- Graduate School of Agric., Kyoto Univ.
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- YAMAKAWA Yosuke
- Graduate School of Agric., Kyoto Univ.
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- MASAOKA Naoya
- Graduate School of Agric., Kyoto Univ.
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- MIZUYAMA Takahisa
- Graduate School of Agric., Kyoto Univ.
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- FUNAKOSHI Kazuya
- Asia Air Survey Co., Ltd.
Bibliographic Information
- Other Title
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- 熱赤外リモートセンシングによる表層崩壊危険斜面抽出手法の検討
- ネツ セキガイ リモートセンシング ニ ヨル ヒョウソウ ホウカイ キケン シャメン チュウシュツ シュホウ ノ ケントウ
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Abstract
For accurate predictions of shallow landslide occurrences, it is essential to develop techniques which can efficiently detect locations of rainwater convergence within natural hillslopes. As one of such techniques, this study evaluated applicability of thermal infrared remote sensing. We studied a hillslope covered with a plantation of 40-year-old Japanese cedars, which showed relatively flat and homogeneous canopy surfaces. A thermal image of the forest canopy was taken during hot and dry daytime, by using an infrared thermography from a location 100-250 m distant from the studied hillslope. The image clearly detected some areas which showed lower canopy surface temperatures than surrounding areas. Along a line transecting both high-and low-canopy temperature areas, distributions of soil thickness and soil water content were measured by using a combined-penetrometer-moisture probe, and an electrical resistivity survey, which employed a dipole-dipole electrode arrangement, was conducted. As a result, the lower canopy temperature area showed higher soil water content and lower electrical resistivity than the high canopy temperature area, indicating that the thermal infrared remote sensing can be effectively used to detect locations of rainwater convergence within hillslopes, and, consequently, can be an efficient technique for locating slopes with high landslide-vulnerability. The result was supported by occurrences of two small landslides within the low canopy temperature area.
Journal
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- Journal of the Japan Society of Erosion Control Engineering
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Journal of the Japan Society of Erosion Control Engineering 64 (6), 32-37, 2012
Japan Society of Erosion Control Engineering
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Details 詳細情報について
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- CRID
- 1390282680455370752
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- NII Article ID
- 10030171256
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- NII Book ID
- AN0012035X
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- ISSN
- 21874654
- 02868385
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- NDL BIB ID
- 023604521
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed