Seismic and Hydrostratigraphic Characterization of the Onshore-Offshore Freshwater Systems of Martha’s Vineyard and Nantucket, Massachusetts, USA

美国马萨诸塞州玛莎葡萄园岛和楠塔基特陆上-海上淡水系统的地震和水文地层特征

• 批准号: 2052794
• 负责人: Brandon Dugan
• 金额: $ 4.94万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2052794&HistoricalAwards=false
• 关键词: Seismic; Hydrostratigraphic; Characterization; Onshore; Offshore

Coastal hydrological systems provide significant freshwater resources to coastal communities around the world. These resources are exploited by groundwater wells that produce from aquifers at depths of less than 100 m. Globally, these resources are declining due to overuse, increasing population, and climate change. To improve water supplies and security, new approaches to understanding underused and poorly quantified freshwater resources are needed. One such resource is freshwater that extends from onshore to offshore, potentially extending up to 100km offshore in some regions, such as the northeastern margin of the United States. To better understand the dynamics of these onshore-offshore hydrologic systems, we need dedicated, coordinated onshore and offshore hydrogeological studies. This research project on Martha’s Vineyard and Nantucket, MA, USA will increase our understanding of the coastal freshwater resources by characterizing the sedimentary layering in the coastal environment through geophysical surveys. This work is a critical piece to the integrative, multi-pronged (geophysics, drilling and sampling, modeling) research that is required to understand the dynamics of the onshore-offshore systems and to define their potential as a resource. This study has the potential to establish the protocols for studying global onshore-offshore freshwater resources, to improve understanding of under-developed freshwater resources, and to inform future studies on the maintenance and sustainability of this resource.Over the last 15 years, there has been growing research on onshore-offshore freshwater systems including geophysical surveys and numerical models that have been motivated by drilling data that were not collected to address freshwater resources. To date, however, no dedicated and integrated onshore-offshore study has been completed to study the dynamics, volumes, and producibility of these offshore freshwater resources. Our proposed study of the hydrostratigraphy on Martha’s Vineyard and Nantucket Island, MA, USA through collection, processing, and interpretation of seismic data is a key portion to the first complete onshore-offshore characterization. The data obtained from this award will be used to support an International Continental Scientific Drilling Program (ICDP) proposal to drill wells to quantify the hydrologic properties and groundwater age for the onshore portion of this coastal aquifer system. This complements an International Ocean Discovery Program (IODP) proposal to drill wells to quantify hydrologic properties and groundwater age for the offshore component of this onshore-offshore aquifer. Combined, this research would be the first dedicated, shoreline-crossing geological, geophysical, and hydrogeological study of onshore-offshore freshwater addressing many questions related to the dynamics, sustainability, and utility of these freshwater systems that exist globally. This award was co-funded by the Earth Sciences Hydrologic Sciences Program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

沿海氢系统为世界各地的沿海社区提供了重要的淡水资源。这些资源是由地下水井探索的，这些井的深度不到100 m。在全球范围内，由于过度使用，人口增加和气候变化，这些资源正在下降。为了改善水供应和安全性，需要采用新的方法来了解未量化和量化不足的淡水资源。这样的资源是一种淡水，它从陆上延伸到近海，在某些地区，例如美国东北边缘的某些地区，可能会延伸至100公里。为了更好地了解这些陆上岸水文系统的动态，我们需要专门的，协调的陆上和近海水文学研究。这项关于玛莎（Martha）葡萄园和美国纳特基特（Nantucket）的研究项目将通过通过地球物理调查来表征沿海环境中的沉积物分层来增强我们对沿海淡水资源的了解。这项工作对于了解陆上岸系统的动态并将其潜力定义为资源所需的综合，多管齐下（地球物理学，钻探和采样，建模）研究是至关重要的一部分。这项研究有可能建立研究全球陆上岸淡水资源的方案，以提高对欠发达的淡水资源的了解，并为未来关于该资源的维护和可持续性的研究提供信息。在过去的15年中，越来越多地研究了越来越多的地球物理学调查模型，包括磨砂器，这些研究越来越多，这些研究是通过钻探来探讨了用于钻探数据的，这些模型已被钻探。然而，迄今为止，尚未完成陆上岸的专用和整合的研究，以研究这些离岸淡水资源的动态，量和生产。我们提出的对玛莎葡萄园和美国马萨诸塞州纳特基特岛的水学位的研究通过收集，处理和解释地震数据是第一个完整的陆上沿岸表征的关键部分。从该奖项获得的数据将用于支持国际大陆科学钻探计划（ICDP）提案，以钻井以量化该沿海含水层系统的陆上部分的水文特性和地下水时代。这完成了一项国际海洋发现计划（IODP）的建议，以钻井以量化此陆上岸含水层的离岸组成部分的水文特性和地下水时代。这项研究结合在一起，将是第一个专门的，海岸线的地质，地球物理和水文学研究，对陆上岸淡水，解决了许多与这些淡水系统的动态，可持续性和实用性有关的问题。该奖项是由地球科学水文科学计划共同资助的。该奖项反映了NSF的法定使命，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为是通过评估而被视为珍贵的。