Field Report: UAV-Based Volcano Observation System for Debris Flow Evacuation Alarm

Nagatani, Keiji; Yajima, Ryosuke; Kiribayashi, Seiga; Izu, Tomoaki; Kanai, Hiromichi; Kanasaki, Hiroyuki; Minagawa, Jun; Moriyama, Yuji

doi:10.1007/978-3-319-67361-5_11

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…This paper introduces the intended utilization scenario for the developed system in the case of a volcano eruption. The details of the indoor and field experiments of the system reported in this paper are based on the paper submitted to Field and Service Robotics (FSR) 2017 (Nagatani et al, ). Finally, this paper introduces the developed debris flow simulation system with several simulation examples targeting Mt.…”

Section: Introductionmentioning

confidence: 99%

Micro‐unmanned aerial vehicle‐based volcano observation system for debris flow evacuation warning

Nagatani

Kiribayashi

Yajima

et al. 2018

Journal of Field Robotics

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When a volcano erupts, molten rocks, ash, pyroclastic flow, and debris flow can cause disasters. Debris flow is responsible for enormous damage across large areas. This makes debris flow simulations a crucial means of determining whether to issue an evacuation warning for area residents. For safety purposes, restricted areas are designated around volcanos during eruptions, making it difficult to gather information (such as the amount and permeability of ash) required for precise debris flow simulations. An unmanned observation system, intended for use in such restricted areas, was developed to address this issue. The proposed system is based on a multirotor micro-unmanned aerial vehicle (MUAV) that transports cameras, small devices to measure target environments, and a small robot to active volcanic areas.Several field tests were performed around active volcanoes for validation and system improvement. This study investigates five unmanned systems with field tests. The first one is an autonomous flight to collect three-dimensional (3D) terrain information. The MUAV conducted the long flight at Mt. Unzen-Fugen and evaluated the accuracy and calculation time of the developed 3D terrain model. The second one is a drop-down-type ash-depth measurement scale. The scales were deployed at Mt.Unzen-Fugen and confirmed its function. The third system is a soil-sampling device to estimate permeability. The device is hung from the MUAV by a long tether and collects soil and gravels directly with two rollers, while the MUAV is hovering. Indoor experiments were conducted to evaluate the performance of the device, and field experiments were conducted to confirm the validation of the system in different volcanic environments. The fourth system is an unmanned surface flow measurement device to estimate permeability. The device carries a water balloon and breaks it when it lands on the ground. By observing water flow with mounted cameras, qualitative permeability can be estimated. Initial experiments were conducted at Mt.Unzen-Fugen to confirm its function. The fifth system is a small ground vehicle with a rainfall sensor deployed by an MUAV. The MUAV carries a capturing net suspended from it and delivers and retrieves the ground vehicle, while it is hovering. Field experiments were conducted at Mt. Asama and Mt. Unzen-Fugen to validate the J Field Robotics. 2018;35:1222-1241. wileyonlinelibrary.com/journal/rob 1222 |

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Section: Introductionmentioning

confidence: 99%

Micro‐unmanned aerial vehicle‐based volcano observation system for debris flow evacuation warning

Nagatani

Kiribayashi

Yajima

et al. 2018

Journal of Field Robotics

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Flood Assessment and Identification of Emergency Evacuation Routes in Seti River Basin, Nepal

Thapa

Watanabe

Regmi

2022

Land

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Sudden floods frequently occur in the Himalayas under changing climates. Rapid glacial melt has resulted in the formation of glacial lakes and associated hazards. This research aimed to (1) identify flood-prone houses, (2) determine pedestrian emergency evacuation routes, and (3) analyze their relationships to socioeconomic status in the Seti River Basin. Detailed hazard maps were created using field survey results from unmanned aerial vehicle photogrammetry and the Hydrologic Engineering Center River Analysis System. Questionnaire, focus-group, and key-informant surveys helped identify the socioeconomic situation. Inundation maps revealed that most residents are exposed to future flooding hazards without proper evacuation routes. Highly impoverished and immigrant households were at the highest risk in terms of income inequality and migration rate (p < 0.001) and were located on the riverside. The locations of 455 laborers’ houses were significantly correlated with inundation hazards (p < 0.001). Governmental and associated agencies must develop adequate plans to relocate low-income households. Group discussions revealed the need for stronger adaptive capacity-building strategies for future risk management. Pokhara requires better systematic and scientific land-use planning strategies to address this issue efficiently. A similar approach that combines flood modeling, proper evacuation route access, and socioeconomic survey is suggested for this river basin.

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Field Report: UAV-Based Volcano Observation System for Debris Flow Evacuation Alarm

Cited by 2 publications

References 3 publications

Micro‐unmanned aerial vehicle‐based volcano observation system for debris flow evacuation warning

Micro‐unmanned aerial vehicle‐based volcano observation system for debris flow evacuation warning

Flood Assessment and Identification of Emergency Evacuation Routes in Seti River Basin, Nepal

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