Development of procedures to analyse satellite images for early detection of widely-spread liquefaction occurence

开发分析卫星图像的程序，以便及早发现广泛的液化现象

• 批准号: 24656283
• 负责人: KOSEKI Junichi
• 金额: $ 2.58万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656283/
• 关键词: 液状化; 地震; 衛星画像; 現地調査; 室内実験

Analysis was made on a set of high resolution satellite images (GeoEye1) taken before and after the 2011 off the Pacific Coast of Tohoku earthquake. By using information on the sites where liquefaction-induced sand boiling has been observed as training data, location of the sites with similar conditions were identified from the satellite image taken after the earthquake. The results were verified through on-site investigation. In addition, by simulating sand boiling under drying process that is exposed to air, a laboratory test was conducted to reveal the possible change of its image conditions with time. Further analysis was also made on a set of satellite images (RapidEye) that were taken more frequently than the above, it was demonstrated that regions with possible sand boiling over several prefectures could be extracted in rather a short period.

对2011年在Toohoku地震太平洋海岸前后进行的一系列高分辨率卫星图像（Geoeye1）进行了分析。 通过在训练数据中观察到液化引起的砂煮沸的地点的信息，从地震后拍摄的卫星图像中鉴定出具有相似条件的地点的位置。结果通过现场调查验证。此外，通过在暴露于空气的干燥过程中模拟砂沸腾，进行了实验室测试，以揭示其图像条件可能随时间变化的变化。还对一组卫星图像（Rapideye）进行了进一步的分析，这些卫星图像比上述更频繁地进行，这证明可以在短时间内提取可能在几个县沸腾的区域。

项目成果

Detection of liquefaction-induced sand boiling based on satellite image

基于卫星图像的液化引起的砂沸腾检测

• 发表时间: 2013
• 期刊: Bulletin of ERS
• 作者: Ishikawa;T.;Sawada;H.;Ochi;S.;Li;Y. and Koseki;J
• 通讯作者: J

高分解能衛星画像による液状化噴砂地の検出

利用高分辨率卫星图像检测液化喷沙区域

• 发表时间: 2012
• 期刊: 生産研究
• 作者: Ishikawa;T.;Sawada;H.;Ochi;S. and Koseki;J.;越智士郎,古関潤一,沢田治雄
• 通讯作者: 越智士郎,古関潤一,沢田治雄

地震前後の衛星画像を用いた千葉県我孫子市内における噴砂発生箇所の検出

利用地震前后的卫星图像检测千叶县我孙子市的吹沙地点

• 发表时间: 2012
• 作者: Ishikawa;T.;Sawada;H.;Ochi;S. and Koseki;J.;越智士郎,古関潤一,沢田治雄;古関潤一,越智士郎,宮下千花
• 通讯作者: 古関潤一,越智士郎,宮下千花