J Korean Soc Hazard Mitig 2018; 18(1): 13-22  https://doi.org/10.9798/KOSHAM.2018.18.1.13
Leakage Risk Analysis of Reservoir Embankment Using Unmanned Aerial Vehicle System
Kim, Jaehwi*, Park, Songsik**, Kang, Heejin***, Yang, Kwonseok****, Park, Seongjin*****, and Kim, Yongseong******
*Member, Master Course Student, Department of Regional Infrastructure Engineering, Kangwon National University
**Member, Ph.D. Candidate, Department of Regional Infrastructure Engineering, Kangwon National University
***Member, Ph.D. Candidate, Department of Regional Infrastructure Engineering, Kangwon National University
****CEO, Co.Airsens
*****CEO, Co.Sistech
******Member, Professor, Department of Regional Infrastructure Engineering, Kangwon National University
Correspondence to: Member, Professor, Department of Regional Infrastructure Engineering, Kangwon National University (Tel: +82-33-250-6463, Fax: +82-33-251-6463, E-mail: yskim2@kangwon.ac.kr)
Received: September 30, 2017; Revised: October 18, 2017; Accepted: November 20, 2017; Published online: January 31, 2018.
© The Korean Society of Hazard Mitigation. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Majority of domestic reservoirs are decrepit from leaking water and deformations and derived high risk of safety. Typical precision safety diagnosis of reservoir embankment goes through field exterior survey, ground survey, and seismic survey for stability of embankment but this requires considerable time and money and not even precise for analysing embankment leakage investigation. This study, attempted to propose a new method using UAVS (Unmanned Aerial Vehicle system) for embankment risk analysis and efficient embankment stability assessment. First, obtained normal orthomosaic and thermal orthomosaic images of model reservoir was obtained with UAVS and made 3D terrain model was made. Then thermal distribution of downstream slope from thermal orthomosaic was analyzed. Comparing with precise safety material, error of measurement from 3D model was minute and low temperature area distribution was corresponding with ideal range of precise safety diagnosis. It is figured out that UAV method is one of the quick and economical methods for risk analysis of embankment and efficient reservoir field survey.
Keywords: Reservoir, Embankment, UAVS, 3D Terrain Model, Thermal Orthomosaic


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