SGER: Seismic Monitoring of Active Rock Fall Source Areas in the Yosemite National Park

SGER：约塞米蒂国家公园活动岩崩源区的地震监测

• 批准号: 0840580
• 负责人: Nicholas Sitar
• 金额: $ 5.46万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0840580&HistoricalAwards=false
• 关键词: SGER; Seismic; Monitoring; Active; Rock

The unique setting of Yosemite National Park and the Yosemite Valley brings with it a significant risk of rocks falls impacting on major facilities and pathways used by thousands of visitors every year. A preliminary geophone and accelerometer deployment last winter captured a rock fall event demonstrating that of real time monitoring of rock falls is feasible. The objective of this project is to rapidly deploy a denser array of instruments in close vicinity (30 m) of this active source area in order to asses the feasibility of being able to monitor rock noise associate with rock fall initiation and to determine if the instrument records can be used to localize the source of the noise, as is done in other seismic applications. This work has to be done in the summer in order to get safe access to the site. In addition, as time passes the probability of additional events decreases and, therefore, timely response is essential for success. Overall, this is a very high risk and high potential payoff effort that, if successful, could significantly change the way rock fall hazards are identified and monitored. The project has a significant broader impact in many aspects of public safety, since rock fall hazards are not confined just to national parks and Yosemite, in particular. The demonstration of the feasibility of rock fall hazard identification using real time instrumentation will have application in other areas such highway safety. In addition, not much is known about the real time behavior of fractured rock masses and the data should provide an excellent insight into long term rock mass behavior to climatic (temperature, humidity, pressure) changes. Also, having active science project in Yosemite National Park will provide an opportunity to educate the general public about the geology, seismology, and natural evolution of this spectacular landscape.

优胜美地国家公园（Yosemite National Park）和优胜美地谷（Yosemite Valley）的独特环境带来了岩石降低的重大风险，影响了每年成千上万的游客使用的主要设施和途径。 去年冬天，初步的地球管和加速度计的部署捕获了岩石秋季事件，证明对岩石瀑布的实时监测是可行的。 该项目的目的是在该活动源区域的附近（30 m）迅速部署一系列密集的仪器，以评估能够监视与岩石噪声启动的岩石噪声相关的可行性，并确定仪器记录是否可以在其他地震应用中使用噪声来定位。 这项工作必须在夏天完成，以便获得安全访问该网站。 此外，随着时间的流逝，其他事件的概率降低了，因此，及时的响应对于成功至关重要。 总体而言，这是一个很高的风险和高潜在的回报努力，如果成功，可以大大改变岩石掉落危害和监控的方式。该项目在公共安全的许多方面都具有更大的影响，因为岩石坠落的危害不仅限于国家公园和优胜美地。使用实时仪器的岩石跌落危险识别的可行性的证明将在其他领域应用，例如高速公路安全。此外，关于岩石块的实时行为并不多，数据应为长期岩石质量行为带来气候（温度，湿度，压力）变化的出色见解。 此外，在优胜美地国家公园（Yosemite National Park）拥有活跃的科学项目将提供一个机会，以教育公众有关这种壮观景观的地质，地震学和自然发展的机会。