Saltmarsh Circulation, Inundation and Bathymetric Mapping using HF-radar

使用高频雷达绘制盐沼循环、淹没和测深图

• 批准号: 1010591
• 负责人: Dana Savidge
• 金额: $ 27.59万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010591&HistoricalAwards=false
• 关键词: Saltmarsh; Circulation; Inundation; Bathymetric; Mapping

An understanding of the circulation patterns in the extensive salt marsh ecosystems throughout the world is important for a variety of reasons, including the assessment of sediment and pollutant transport within the marshes, and the residence or flushing times of specific regions with respect to commercially important organisms or pollutants. Modeling studies suggest circulation pathways can be quite complex, depending critically on marsh creek bathymetry and curvature, and on connectivity at differing topographic levels within the cyclically inundated marsh intertidal. Effective measurement of circulation of these systems is difficult, owing to the circuitous interconnected tidal creeks, the variety of scales that must be addressed, and the variability of pathways the water may traverse as the topographically complex intertidal areas are successively flooded and drained through each tidal cycle. The PI proposes to add a pair of VHF-radar systems to an upcoming DOE-funded intensive field study directed by colleagues at Skidaway, to demonstrate the radars utility to measure vector velocity within both the channels and inundated intertidal subregions of the marsh, to monitor the presence or absence of water within the intertidal marsh areas, and to invert spectral returns to assess bathymetry in the illuminated area, all at high horizontal resolution. The DOE-sponsored study will provide an extensive data-base against which to test the feasibility of using the VHF-radar system in the salt marsh.Goals: The funding requested will test the ability of paired VHF radars to:1) measure vector velocities within the tidal channels and intertidal marsh,2) detect the transition between inundated and uninundated intertidal areas, and depth limits of detection,3) estimate depths of shallow inundated areas.Broader ImpactsThe ability to measure circulation at high horizontal resolution will provide an order one improvement in our understanding of these issues. Such measurements, along with the ability to define saltmarsh bathymetry and topography at high resolution, will vastly improve our ability to model such systems accurately as well. Such models would provide a significantly improved tool for the use of society?s agencies who are charged with protection and permitting in the marsh setting. Educationally, the database developed with this project will provide engaging student projects over the next several years. Finally, the project will provide a database for our new faculty hire at SkIO who will be joining SkIO as an Assistant Professor in July 2010. She will be able to use the data to develop her modeling program as applied to the rich local salt-marsh setting.

了解全世界广泛的盐沼生态系统的循环模式是重要的，原因有很多，包括评估沼泽内的沉积物和污染物迁移，以及具有重要商业价值的生物或污染物在特定区域的停留或冲刷时间。模拟研究表明，循环路径可以是相当复杂的，严重依赖于沼泽溪水深和曲率，并在不同的地形水平内的连通性周期性淹没沼泽潮间带。这些系统的循环的有效测量是困难的，由于迂回的相互连接的潮沟，必须解决的各种规模，和变化的路径的水可能穿越地形复杂的潮间带地区连续淹没和排水通过每个潮汐周期。PI建议在即将进行的由Skidaway同事指导的能源部资助的密集实地研究中增加一对VHF雷达系统，以证明雷达在测量沼泽的通道和淹没的潮间带分区内的矢量速度，监测潮间带沼泽区域内是否存在水，并反演光谱返回以评估照明区域的测深，都是高水平分辨率。美国能源部赞助的研究将提供一个广泛的数据库，以测试在盐沼中使用VHF雷达系统的可行性。目标：申请的资金将测试配对VHF雷达的能力，以：1）测量潮汐通道和潮间带沼泽内的矢量速度，2）探测淹没和未淹没潮间带之间的过渡，以及探测的深度极限，第三章更广泛的影响在高水平分辨率下测量环流的能力将为我们对以下问题的理解提供一个一阶的改进：这些问题这样的测量，沿着以高分辨率确定盐沼水深和地形的能力，将大大提高我们精确模拟这种系统的能力。这种模式将提供一个显着改善的工具，供社会使用？负责保护和许可沼泽环境的机构。在教育方面，该项目开发的数据库将在未来几年内提供吸引学生的项目。最后，该项目将提供一个数据库，为我们的新教师在SkIO谁将加入SkIO作为助理教授在2010年7月。她将能够使用这些数据来开发她的建模程序，应用于当地丰富的盐沼环境。