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首页> 外文期刊>Environmental Science & Technology >Spatial Distribution of Submarine Groundwater Discharge and Associated Nutrients within a Local Coastal Area
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Spatial Distribution of Submarine Groundwater Discharge and Associated Nutrients within a Local Coastal Area

机译:当地沿海地区海底地下水排放量和相关养分的空间分布

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摘要

To understand the local-scale distribution of submarine groundwater discharge (SGD) and dissolved nutrients, a multiple-detector ~(222)Rn monitoring survey was undertaken along the Mt. Chokai volcanic coast in northern Japan. The surveys revealed that the highest SGD (calculated to be 6.2 × 10~4 m~3 d~(-1), within an area of 2 × 10~4 m~2) with the greatest nutrient fluxes (sum of NO_3~-, NO+2~-, and NH+4~+ (DIN): 9.2 × 10~2 mol d~(-1); PO_4~(3-) (DIP): 56 mol d~(-1)) is present at the edge of the youngest volcanic lava flow in the area. Recharged groundwater transports nutrients through porous volcanic flows and discharges as SGD near shore. Our results demonstrate that the spatial distribution of SGD in the study area is closely regulated by the local geology and topography. Furthermore, we show that continuous ~(222)Rn monitoring with a multidetector system at boat speeds of 1-2 knots provides details at a scale one order of magnitude greater than has been reported previously. In addition, the results of our study suggest that SGD-borne DIP may play an important role in the important local oyster production.
机译:为了了解海底地下水排放(SGD)和溶解性养分的局部分布,在Mt沿线进行了多探测器〜(222)Rn监测。长海火山海岸在日本北部。调查显示,SGD最高(计算为6.2×10〜4 m〜3 d〜(-1),在2×10〜4 m〜2范围内),养分通量最大(NO_3〜-总和) ,NO + 2〜-和NH + 4〜+(DIN):9.2×10〜2 mol d〜(-1); PO_4〜(3-)(DIP):56 mol d〜(-1))为存在于该地区最年轻的火山熔岩流边缘。补给的地下水通过多孔的火山流输送养分,并以SGD形式排放到岸边。我们的结果表明,SGD在研究区域内的空间分布受到当地地质和地形的严格控制。此外,我们显示了使用多探测器系统以1-2节的船速对〜(222)Rn进行连续监测,可提供比以前报道的规模大一个数量级的详细信息。此外,我们的研究结果表明,SGD传播的DIP可能在重要的当地牡蛎生产中起重要作用。

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  • 来源
    《Environmental Science & Technology》 |2012年第10期|p.5319-5326|共8页
  • 作者单位

    Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan;

    Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan;

    Department of Earth, Ocean and Atmospheric Sciences, Florida State University, 117 North Woodward Avenue, Tallahassee, Florida 32306, United States;

    Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan;

    Research Institute for Humanity and Nature, 457-4 Motoyama Kamigamo, Kita-ku, Kyoto 603-8047, Japan;

    Research Institute for Humanity and Nature, 457-4 Motoyama Kamigamo, Kita-ku, Kyoto 603-8047, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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