2021 Fiscal Year Final Research Report
Observing initiation process of a landslide by using multiple high-precision GNSS positioning
| Project/Area Number |
19K13432
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 04010:Geography-related
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 地すべり / GNSS / 地形観測 |
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| Outline of Final Research Achievements |
This study constructed long-term field observation stations for landslide monitoring using low-cost, high-precision and compact GNSS positioning modules. Ten or more observation stations were installed on a landslide in Hamanaka, Hokkaido, to realize simultaneous multipoint high-precision observation of landslide fluctuations at low cost. The monitoring network recorded five major sliding events during the 2 years monitoring period. Minor fluctuations were also recorded before the occurrence of the major sliding events in the landslide. Multiple high-precision GNSS positioning applied to this study was able to detect a series of complex behaviors of the landslide from minor fluctuation to major sliding.
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| Free Research Field |
地形学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，小型GNSSモジュールを用いた低コストの長期野外観測システムにより，地すべりの精密動態観測に成功した．同様の観測手法が他の地すべり地でも応用されれば，多くの地すべりにおいてこれまで捕捉できなかった多用な挙動が明らかになると予想される．これは効率的な地すべりの抑止策や早期警戒監視指標の開発にもつながる．また，地すべり観測はもとより，中小規模の地形変化の観測が必要な他の分野においても，その応用が期待できる．
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