...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Volcanology and Geothermal Research >The emplacement of the active lava flow at Sinabung Volcano, Sumatra, Indonesia, documented by structure-from-motion photogrammetry
【24h】

The emplacement of the active lava flow at Sinabung Volcano, Sumatra, Indonesia, documented by structure-from-motion photogrammetry

机译：运动结构摄影测量法记录了印度尼西亚苏门答腊锡纳蓬火山活跃熔岩流的位置

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An effusive eruption at Sinabung Volcano in Indonesia began in December 2013. We use structure-from-motion (SfM) photogrammetric techniques to create digital elevation models (DEMs) of the active lava flow. We build DEMs from photographs taken during two separate time periods and from two separate low-cost handheld cameras and compare them with a pre-eruption DEM to assess the quality and accuracy of photogrammetric DEMs created using different cameras, calculate flow volume and long-term average effusion rate, and document changes in flow morphology. On September 22nd, 2014, the lava flow was 2.9 km long and had a volume of 1.03 +/- 0.14 x 10(8) m(3), leading to an estimated time-averaged discharge rate of 4.8 +/- 0.6 m(3) s(-1). Differencing the photogrammetric DEMs shows that during the two-week field campaign, topographic changes of the flow occurred in zones along the flow front and on the upper flank, a finding supported by relatively high temperatures in corresponding thermal images. The deformation can be explained by active advance at the flow front and development of instabilities and collapse on the upper flanks. large pyroclastic density currents associated with gravitational collapse of upper-flank instabilities in October 2014 and June 2015 were caused by lava growing over ridges that had initially confined the flow to a pre-existing channel. This work demonstrates the ability of SfM photogrammetry to measure or identify the lava flow volume, time-averaged discharge rate, flow emplacement rate and style, as well as the development of gravitational instabilities. Our results show the potential of SfM photogrammetry as a cost- and time-effective method of repeatedly measuring active volcanic features and monitoring hazards at Sinabung and during similar eruptions. (C) 2018 Elsevier B.V.
机译：2013年12月，印度尼西亚的锡纳蓬火山爆发了喷发。我们使用动态结构（SfM）摄影测量技术创建了活动熔岩流的数字高程模型（DEM）。我们根据在两个不同时间段内拍摄的照片以及两个独立的低成本手持相机来构建DEM，并将它们与喷发前的DEM进行比较，以评估使用不同相机创建的摄影测绘DEM的质量和准确性，计算流量和长期平均积液率，并记录流动形态的变化。 2014年9月22日，熔岩流长2.9 km，体积为1.03 +/- 0.14 x 10（8）m（3），估计的时间平均排放速率为4.8 +/- 0.6 m（ 3）s（-1）。摄影测量DEM的差异显示，在为期两周的野战期间，流动的地形变化发生在沿流动前沿和上侧面的区域中，这一发现得到了相应热图像中相对较高的温度的支持。变形可以通过流动前沿的积极推进和不稳定性的发展以及上侧面的塌陷来解释。 2014年10月和2015年6月与上翼不稳定失稳相关的大火山碎屑流是由熔岩在山脊上生长引起的，这些熔岩最初将流量限制在预先存在的通道内。这项工作证明了SfM摄影测量法能够测量或识别熔岩流量，时间平均流量，流量进位速率和样式以及重力不稳定性的发展。我们的结果表明，SfM摄影测量法具有潜力，可以作为一种经济有效的方式来重复测量活动的火山特征并监测Sinabung和类似火山爆发期间的危害。 （C）2018爱思唯尔B.V.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号