碩士 / 國立中山大學 / 海洋環境及工程學系研究所 / 104 / Disaster or accident happened in or related to the aquatic environment is much more difficulty and dangerous to the rescuers as compared to those happened in the terrestrial environment. In this circumstance, detection, location and salvage the victims under the water or on the water bottom are the major challenges faced by the rescuers. An efficient and reliable way of detecting and locating the victims is therefore a major component of the operation.
After the TransAsia Airways flight GE235 plane crash landed in Keelung River in February, 2015 (codenamed Nan-Kong Aviation Accident), 12 people were missing and were expected to have been pulled down the river. After exhausted searching operation by divers but in vain, the potential location of the 3 still missing people were seriously re-examined. It was concluded that the Nan-Hu bridge area is one of the most potential areas and a comprehensive underwater acoustic investigation of this specific area was recommended. A bottom fixed mechanically scanned imaging sonar was therefore employed for this specific searching for operation.
Based on underwater acoustic images collected, underwater environment and topographic features of the Nan-Hu bridge area can be divided into six distinctive regions, in a sequence from upstream to downstream, i.e., flow channel region, upstream region, submerged dike region, depositional region, erosion region, and downstream region. Based on outer appearance, composition and dimensions, a total of 25 potential or unidentified targets were recognized in the high resolution acoustic images.
The 25 potential targets positioned in Nan-Hu bridge area were further identified and proved individually by divers. In this case, two of the 3 unaccounted personnel were located at the submerged dike region. All the other potential targets were proved to be either concrete blocks or logs. In addition, it was also concluded that the last unaccounted personnel was not located in this specific bridge area.
From a time series point of view, the dates that the unaccounted personnel were detected and salvaged in this accident could be grouped into two categories. At flat and muddy bottom regions, searching for operations by divers could be completed effectively and comprehensively in a short period of time. However, prominent technical limitations existed for locating those missing personnel by divers at the rugged regions which might detain the progress of the whole searching for operation.
| Identifer | oai:union.ndltd.org:TW/104NSYS5282016 |
| Date | January 2016 |
| Creators | Pei-chun Huang, 黃培鈞 |
| Contributors | Wen-Miin Tian, 田文敏 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 112 |
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