2018 Fiscal Year Annual Research Report
Space-time analysis of vetrical evacuation by Tsunami and the vulnability assessment
| Project/Area Number |
18J11292
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| Research Institution | University of Tsukuba |
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Principal Investigator |
ラナガラゲマンジュラ マヒンダ 筑波大学, 生命環境科学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2018-04-25 – 2020-03-31
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| Keywords | tsunami scenario / building volume / vertical evacuation / nighttime population / Moratuwa / DSM / DTM / gspatial analysis |
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| Outline of Annual Research Achievements |
The purpose of this study was to spatially evaluate the potential for tsunami vertical evacuation in the western coastal belt in Sri Lanka. Several criteria and assumptions have been computed to achieve the goal of the study. A geographic information system (GIS), remote sensing (RS), and demographic data facilitated the completion of the following tasks: (i) preparation of three tsunami scenarios based on the 2004 tsunami experience; (ii) updating the building layer and calculating the building height and volume by using airborne light detection and ranging (LiDAR) data; (iii) calculating the inundation ratio building volume loss, available building volume, and nighttime population; (vi) identifying the tsunami vertical evacuation sites based on the existing urban spatial structure; (vii) estimating the maximum capacity of the selected vertical evacuation sites using a usable building volume index (UBVI) and volume determination factor (VDF); and (vii) calculating tsunami arrival time, distance and time from resident place to evacuation centers in three tsunami scenarios.
This study contributes to the use of existing urban structures to identify vertical evacuation sites based on three tsunami scenarios. The capacity estimation was done based on the newly proposed two indexes (UBVI and VDF), and this methodology can be used as a reference methodology in future tsunami vertical evacuation studies for different locations, especially lowland coastal cities to produce similar results.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
2019年3月に，博士（理学）の学位論文を取得した．学位論文のタイトルは，「津波に対する垂直的避難の可能性に関する空間的評価：スリランカの西部沿岸地帯の事例研究」である．GISとリモートセンシングを援用して，津波による被害地域の拡大を予測するとともに，シナリオ分析により，垂直的避難の有効性を定量的に分析した．ほぼ，計画していた成果をあげることができた．とくに，現地フィールドワークにより，住民の津波に対する防災意識を定量化できたのは収穫であった．
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| Strategy for Future Research Activity |
博士（理学）の学位論文の成果を踏まえ，さらに発展させた都市災害の研究を行いたい．具体的には，研究対象をアジア地域に広げ，ムンバイ，カラチ，ダッカ，コロンボなどのメガシティの都市災害の脆弱性をGISやリモートセンシングなどの空間情報技術を駆使して空間的に把握するとともに，シナリオ分析を用いて，将来予測を行って，持続的発展に向けた有効な政策や計画を提言したい．
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Research Products
(7 results)
