Generalized Transport Models in Earth Surface Dynamics: Novel Experiments for Demonstrating and Quantifying Non-local Transport

地球表面动力学中的广义输运模型：演示和量化非局域输运的新颖实验

• 批准号: 1318593
• 负责人: Vaughan Voller
• 金额: $ 18万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1318593&HistoricalAwards=false
• 关键词: Generalized; Transport; Models; Earth; Surface

Generalized Transport Models in Earth Surface Dynamics: Novel Experiments for Demonstrating and Quantifying Non-local TransportVaughan Voller, Efi Foufoula-Georgiou, Kimberly Hill, Chris PaolaUniversity of MinnesotaEAR-1318593ABSTRACTUnderstanding the transport of environmental fluxes, such as sediment, tracers, particulates, and pollutants, on the Earth?s surface is paramount for building accurate models of geomorphic transport, quantifying landscape evolution under natural and human-induced changes and for inferring past surface conditions from interpretation of the stratigraphic record. Historically, geomorphic transport models have expressed particulate or sediment flux in terms of instantaneous local properties, such as gradients in the surface elevation or local velocities. Accurate models of sediment and particulate transport in rivers, hillslopes, and deltaic systems are at the heart of Earth surface Dynamics research as well as of practical significance in guiding environmental management based on accurate predictive models. The increasing awareness of the heterogeneity and connectivity of Earth systems has led to new theoretical constructs which embrace non-locality and collective behavior in geomorphic transport. The proposed novel and simple experimental systems promise to provide the first unambiguous evidence of the role of non-local transport in sediment and particulate regimes. Linking the results of these experiments to the evaluation of non-local and anomalous diffusion properties will allow researchers to more confidently predict when to use non-local models and which parameters to use in these models. This information will have a transformative impact on our ability to understand the transport of sediment particles that shape and control the evolution of the Earth-surface environment. The proposed experiments are novel and will be constructed using 3-D printing technology. PIs also propose to prototype ?toy experimental? systems that will provide zero set-up time desktop demonstrations of anomalous diffusion behaviors. Their plan is to disseminate these systems through the current NCED educational and museum contacts, and specifically advance the development of a prototype exhibit at the Science Museum of Minnesota, a long-time partner of NCED.

地球表面动力学中的广义传输模型：演示和量化非局部传输的新实验Vaughan Voller、Efi Foufoula-Georgiou、Kimberly Hill、Chris Paola明尼苏达大学EAR-1318593摘要了解环境通量的传输，例如沉积物、示踪剂、颗粒物和污染物，在地球上？地球表面的变化对于建立地貌迁移的精确模型、量化自然和人为变化下的景观演变以及从地层记录的解释中推断过去的地表条件至关重要。从历史上看，地貌输运模型用瞬时局部特性（如地表高程梯度或局部速度）来表示微粒或沉积物通量。河流、山坡和三角洲系统中泥沙和颗粒物输运的精确模型是地球表面动力学研究的核心，也是基于精确预测模型指导环境管理的实际意义。对地球系统的异质性和连通性的日益认识导致了新的理论结构，其中包括地貌运输中的非局部性和集体行为。拟议的新颖和简单的实验系统的承诺，提供第一个明确的证据，非本地运输的作用，在沉积物和颗粒制度。将这些实验的结果与非局部和异常扩散特性的评估联系起来，将使研究人员能够更自信地预测何时使用非局部模型以及在这些模型中使用哪些参数。这些信息将对我们理解沉积物颗粒的迁移产生变革性影响，沉积物颗粒塑造和控制地球表面环境的演变。 拟议的实验是新颖的，将使用3D打印技术构建。 PI也建议原型？玩具实验？系统，将提供零设置时间的桌面演示异常扩散行为。他们的计划是通过目前的NCED教育和博物馆联系传播这些系统，特别是推进在明尼苏达州科学博物馆，NCED的长期合作伙伴原型展览的发展。