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首页> 外文会议>RSPSoc annual conference and Irish earth observation symposium 2010 >Regional Scale Assessment of SGD (Submarine Groundwater Discharge) in Ireland
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Regional Scale Assessment of SGD (Submarine Groundwater Discharge) in Ireland

机译：爱尔兰的SGD（海底地下水排放量）区域规模评估

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Submarine Groundwater Discharge (SGD) is receiving considerable attention in the literature as a major pathway for anthropogenic pollutants travelling from land to sea. SGD can be extensive and carry a significant nutrient load to coastal areas, in reported cases exceeding contamination due to surface water runoff. Recognition that SGD is an important pathway for freshwater, associated nutrients, contaminants and other materials to near shore marine environments necessitates the development of tools that will facilitate regional coastal zone assessments of its environmental impact, including localization, spatial extent and magnitude as well as the provision of geographical and geomorphological constraints for follow-up studies aiming at precise quantification of freshwater and associated pollutant discharges. We propose that thermal remote sensing coupled with field verification might be the most effective and affordable means to assess the regional extent of groundwater discharge. This paper explores the potential of freely available Landsat ETM+ imagery for SGD detection around the coastline of Ireland as a preliminary constraint for subsequent quantification through the integration of high resolution airborne thermal imagery and geochemical tracing techniques (Radon and the Radium quartet) in the ongoing study. The results show that sea surface temperature values (SST) derived from the Landsat ETM+ thermal waveband are sufficient to detect anomalous zones of cooler water in close proximity to the shoreline, likely associated with SGD. A preliminary list of potential SGD locations in Ireland derived through this approach is provided.
机译：海底地下水排放（SGD）作为人为污染物从陆地到海洋传播的主要途径，在文献中受到了广泛关注。 SGD可能范围广泛，并在沿海地区承载大量养分，在已报告的情况下，由于地表水径流而超出污染范围。认识到SGD是淡水，相关养分，污染物和其他物质进入近岸海洋环境的重要途径，因此需要开发工具，以促进区域沿海地区对其环境影响的评估，包括局部性，空间范围和大小以及为后续研究提供地理和地貌限制，以精确量化淡水和相关的污染物排放量。我们建议将热遥感与现场验证相结合，可能是评估地下水排放区域范围的最有效，最经济的方法。本文探讨了免费的Landsat ETM +影像在爱尔兰海岸线附近进行SGD检测的潜力，将其作为进行后续定量分析的初步限制，方法是将正在进行的研究中的高分辨率机载热成像和地球化学示踪技术（Radon和Radium quartet）整合在一起。结果表明，从Landsat ETM +热波段获得的海表温度值（SST）足以检测到靠近海岸线的较凉水的异常区域，这很可能与SGD有关。提供了通过此方法得出的爱尔兰潜在的SGD位置的初步列表。

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