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Tracing Submarine Groundwater Discharge into the Ocean

Tracing Submarine Groundwater Discharge into the Ocean
追踪海底地下水排放到海洋中
批准号:
9101797
负责人:
William Burnett
金额:
$36.17万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1991
资助国家:
美国
项目状态:
已结题
起止时间:
1991-10-15 至 1995-09-30

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中文摘要
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英文摘要
Submarine springs and seeps discharge a substantial but not precisely defined quantity of water into the ocean. Recent estimates suggest that the magnitude of this discharge, driven by gravitational and convective forces, may be globally significant. Discharged fluids may consist of fresh water, connate waters, brines derived from evaporite deposits, or recirculated seawater. Because the composition of submarine hydrologic discharge may be markedly different than seawater, this process is capable of contributing significantly to the marine geochemical cycling of many elements. The proposed research will determine the potential of using water column standing crops of the tracers 222Rn, 226Ra and CH4, constituents greatly enriched in groundwater relative to seawater, for the purpose of locating and assessing submarine groundwater discharge to the ocean. A detailed geochemical mass balance will be constructed for the single best tracer, 222Rn, within a relatively small area on the continental shelf of northwest Florida, an area where we expect to find appreciable submarine discharge. Groundwater tracer concentrations and fluxes will be measured, both in the form of discrete springs and as disseminated seeps. Benthic fluxes and other processes, such as advection and air-sea exchange, which contribute to changes in the water column standing crop will be evaluated. These measurements will be modeled to evaluate the prospects of developing a simple tracer-based technique for determining the magnitude of groundwater discharge to the ocean applicable to other areas.
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Collaborative Research: Groundwater Discharge, Benthic Coupling and Microalgal Community Structure in as Shallow Coastal Lagoon
  • 批准号:
    0961970
  • 项目类别:
    Standard Grant
  • 资助金额:
    $22.96万
  • 财政年份:
    2010
  • 负责人:
    William Burnett
  • 依托单位:
US-Egypt Cooperative Research: Study of Nutrient Fluxes via Submarine Groundwater Discharge into the Coastal Zone Around Alexandria, Egypt
  • 批准号:
    0809040
  • 项目类别:
    Standard Grant
  • 资助金额:
    $2.37万
  • 财政年份:
    2008
  • 负责人:
    William Burnett
  • 依托单位:
Collaborative Research: Assessment of Groundwater Inputs into Coastal Waters of Hawaii via Natural Tracers and Aerial Imagery
  • 批准号:
    0451386
  • 项目类别:
    Standard Grant
  • 资助金额:
    $20.64万
  • 财政年份:
    2005
  • 负责人:
    William Burnett
  • 依托单位:
Assessing the Driving Forces of Submarine Groundwater Discharge
  • 批准号:
    0520723
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $0.0万
  • 财政年份:
    2005
  • 负责人:
    William Burnett
  • 依托单位:
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