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首页> 外文学位 >Multi-scale three-dimensional mapping of coastal cliff erosion and coastal landslides in California: Applications in digital photogrammetry and GIS.
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Multi-scale three-dimensional mapping of coastal cliff erosion and coastal landslides in California: Applications in digital photogrammetry and GIS.

机译：加利福尼亚沿海悬崖侵蚀和沿海滑坡的多尺度三维映射：在数字摄影测量和GIS中的应用。

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摘要

Digital photogrammetry is increasingly being used to assess shoreline change. This method has traditionally been used to produce orthophotographs from digital aerial photography; this study focuses on developing techniques of deriving 3D topographic models from the digital photogrammetry workflow. A limiting factor to this technology is obtaining high-resolution aerial photography of spatial and temporal interest. A Coastal Aerial Mapping System (CAMS) was developed to collect aerial photography on demand for areas of interest. This aerial mapping allows for rapid response to storm events and provides a cost-effective method of establishing a continual monitoring program in erosion hazard areas.; Coastal cliff retreat along the central California coast is episodic, occurring in response to single large storms or seismic events. This study addresses the processes of episodic and short-term coastal cliff retreat through the analysis of seacliff failure styles and retreat magnitudes in central California using aerial photography and digital photogrammetry. The earliest data set is vertical aerial photography taken the day following the Loma Prieta earthquake. More recent photography was collected in the winter of 1998 during the 1997–98 El Nino. Digital photogrammetric techniques are used to identify coastal cliff erosion processes due to the winter storms and the earthquake. Results suggest that on large-scale climatic events such as the 1997–98 El Nino have a greater impact on coastal cliff erosion than do even large earthquakes.; The California Department of Transportation (Caltrans) is exploring solutions to the problems faced with keeping coastal Highway 1 open and safe after large landslides close or damage the road while minimizing impacts to the Monterey Bay National Marine Sanctuary (MBNMS) below the road. As a contribution to developing a highway management plan, and in order to advance the fundamental understanding of coastal landslide processes along this stretch of coastline, a technique is developed to quantify the historical volume of sediment that enters the littoral system from coastal slope failures. The volume losses are related to the complex geology of the region to determine what geological characteristics are most important in determining higher sediment yield from coastal landslides.
机译：数字摄影测量法越来越多地用于评估海岸线变化。传统上，这种方法已用于从数字航空摄影中生成正射照片。这项研究的重点是从数字摄影测量工作流程中推导3D地形模型的技术。该技术的限制因素是获得具有时空关注的高分辨率航空摄影。开发了沿海航空制图系统（CAMS），可根据需要收集感兴趣区域的航空摄影。这种空中测绘可以快速响应风暴事件，并提供了一种经济有效的方法来在侵蚀危险区域建立持续监测计划。加利福尼亚中部沿海沿海悬崖撤退是偶发性的，是对单个大风暴或地震事件的响应。这项研究通过使用航空摄影和数字摄影测量技术，通过分析加利福尼亚中部的海崖破坏样式和退缩幅度，解决了突发性和短期沿海悬崖退缩的过程。最早的数据集是在Loma Prieta地震后的第二天拍摄的垂直航拍。 1998-1997年厄尔尼诺现象期间，1998年冬季收集了更多的最新照片。数字摄影测量技术被用于识别由于冬季风暴和地震造成的沿海悬崖侵蚀过程。结果表明，在诸如1997-98年的厄尔尼诺现象之类的大规模气候事件中，对沿海悬崖侵蚀的影响甚至比大地震更为严重。加利福尼亚州交通运输部（Caltrans）正在探索解决方案，以解决在大型滑坡关闭或损坏道路后保持沿海1号公路开放和安全的问题，同时最大程度地减少对道路下方的蒙特雷湾国家海洋保护区（MBNMS）的影响。作为制定公路管理计划的一项贡献，并且为了增进对沿这条海岸线的沿海滑坡过程的基本了解，开发了一种技术来量化从沿海坡度破坏进入沿海系统的沉积物的历史量。体积损失与该地区的复杂地质有关，以确定哪种地质特征对确定沿海滑坡的较高沉积物产量最重要。

著录项

  • 作者

    Hapke, Cheryl Joyce.;

  • 作者单位

    University of California, Santa Cruz.;

  • 授予单位 University of California, Santa Cruz.;
  • 学科 Geology.; Remote Sensing.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;遥感技术;
  • 关键词

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