Collaborative Research: FACET: Quantifying the topographic response to tectonic processes in southern Taiwan

合作研究：FACET：量化台湾南部地形对构造过程的响应

• 批准号: 1727774
• 负责人: Tammy Rittenour
• 金额: $ 29.28万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1727774&HistoricalAwards=false
• 关键词: Collaborative; Research; FACET; Quantifying; topographic

The interaction of climate-driven erosion and tectonic processes shape and sculpt Earth?s topography through a range of processes. The processes can be gradual, such as the slow, continuous collision of tectonic plates lifting a landscape above sea-level, or they can be catastrophic such as rare, high magnitude earthquakes or large tropical cyclones that drive erosion by landslide processes. This project, a collaborative effort between U.S. and Taiwanese researchers, is aimed at understanding how such processes interact over a range of timescales using southern Taiwan as a natural laboratory. Specifically, this project will advance knowledge by elucidating the erosion processes responsible for shaping the landscape and how tectonics and climate influence these processes. The collaboration with Taiwanese and U.S. scientists will build international research capacity while understanding the topographic signature of hazardous tectonic, climate, and erosion processes, such as earthquakes, typhoons, and landslides. The project benefits society or advances desired societal outcomes in many ways. Graduate student training, U.S.-Taiwan graduate student workshop activities, and early career scientist support will develop a competitive STEM workforce. Additionally, the project will facilitate the interaction among Taiwanese scientists and graduate students with U.S. graduate students through a summer graduate student workshop tectonic geomorphology co-taught by the research team and forge new research collaborations between U.S. scientists and Taiwanese scientists. This project will explore the interaction of climate driven erosion, tectonics, and topography along the steep topographic gradient in southern Taiwan. The U.S. and Taiwan research team will test the ideas that (1) detachment-limited stream power erosion model predicts the fluvial response to tectonics in southern Taiwan; (2) catchment averaged erosion rates estimated from cosmogenic radionuclides provide reliable estimates for hillslope erosion in southern Taiwan; and (3) deformation and mountain building processes propagated towards the south in southern Taiwan at about 60-90 mm/yr. The team will quantify river incision and hillslope erosion through the Holocene to constrain the magnitude of landscape disequilibrium along strike of the steep topographic gradient. River incision will be estimated by dating strath terraces perched well above modern river high water marks. Hillslope erosion throughout the Holocene will be constrained by estimating paleo-erosion rates with cosmogenic nuclides in the sediments on the terraces. Additionally, the research team will quantify structural data and integrate these with geodetic and geophysical data to understand the kinematic evolution and tectonic processes along strike. The integrated geomorphic and tectonic picture of the study area will provide a rigorous test of the underlying physical controls of river incision in a tectonically active landscape and constrain the rate of orogenic processes using geomorphic, topographic, and kinematic information.This award is co-funded by the NSF Office of International Science and Engineering.

气候驱动的侵蚀和构造过程的相互作用通过一系列过程形成了地球的形状。这些过程可以是逐渐的，例如构造板的缓慢，连续的碰撞，将景观提升到海平面上方，也可能是灾难性的，例如稀有的，高幅度的地震或大型热带气旋，这些旋风会通过滑坡过程驱动侵蚀。该项目是美国和台湾研究人员之间的合作努力，旨在理解在台湾南部作为自然实验室的一系列时间尺度上，这种过程如何相互作用。具体而言，该项目将通过阐明负责塑造景观的侵蚀过程以及构造和气候如何影响这些过程的侵蚀过程来提高知识。与台湾和美国科学家的合作将建立国际研究能力，同时了解危险的构造，气候和侵蚀过程的地形签名，例如地震，台风和滑坡。该项目在许多方面使社会或进步都带来了期望的社会成果。研究生培训，美国台湾研究生研讨会活动和早期职业科学家的支持将发展竞争性的STEM劳动力。此外，该项目将通过研究团队与美国科学家与台湾科学家之间的新研究合作授课，促进台湾科学家和研究生与美国研究生与美国研究生之间的相互作用。该项目将探讨台湾南部陡峭的地形梯度沿着气候驱动的侵蚀，构造和地形的相互作用。美国和台湾研究团队将测试（1）（1）脱离的溪流功率侵蚀模型预测台湾南部构造构造的河流反应； （2）从宇宙放射性核素估计的流域平均侵蚀率可靠地估计台湾南部的山坡侵蚀； （3）以60-90毫米/年的速度向台湾南部的南部传播的变形和山地建筑工艺。该小组将通过全新世量化河流切口和山坡侵蚀，以限制陡峭的地形梯度罢工的景观不平衡的幅度。河流切口将通过约会strath露台栖息在现代河流高水位上方。整个全新世的山坡侵蚀将通过估计梯田沉积物中宇宙核素的古渗透率来限制。此外，研究团队将量化结构数据，并将其与地球物理数据和地球物理数据整合在一起，以了解沿罢工沿袭的运动学进化和构造过程。研究区域的综合地貌和构造图片将在构造活跃的景观中对河流切口的潜在物理控制进行严格的测试，并使用地貌，地形图和运动信息限制造山学过程的速率。这项奖项由国际科学和工具设备的NSF办公室共同资助。

项目成果

Landslides control the spatial and temporal variation of channel width in southern Taiwan: Implications for landscape evolution and cascading hazards in steep, tectonically active landscapes

• DOI: 10.1002/esp.4353
• 发表时间: 2017-12
• 期刊: Earth Surface Processes and Landforms
• 影响因子: 3.3
• 作者: B. Yanites;N. Mitchell;J. Bregy;G. Carlson;Kirstyn Cataldo;Margaret Holahan;G. Johnston;A. Nelson;J. Valenza;M. Wanker

Extreme event-driven sediment aggradation and erosional buffering along a tectonic gradient in southern Taiwan

• DOI: 10.1130/g49304.1
• 发表时间: 2022-01-01
• 期刊: GEOLOGY
• 影响因子: 5.8
• 作者: DeLisle, Clarke;Yanites, Brian J.;Rittenour, Tammy M.
• 通讯作者: Rittenour, Tammy M.