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首页> 外文期刊>Estuarine Coastal and Shelf Science >Quantification of openness and wave activity in archipelago environments
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Quantification of openness and wave activity in archipelago environments

机译：量化群岛环境中的开放性和波浪活动

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摘要

Ecological and geomorphological processes in the littoral zone are greatly influenced by waves. Despite its importance wave exposure is not often quantified as a spatial parameter in coastal research. We present three GIS-based approaches for openness and wave exposure assessment in archipelago environments. First, we studied openness by fetch measurements: a theme map of sea area openness showing average fetch lengths for 1 km~2 study cells over the SW-Finnish archipelago area of 16 900 km~2 was produced. Second, we calculated wave exposure based on average wave power values for shoreline points to create a shoreline exposure classification within the same study areas. Finally, we made temporal graphs to study the variation in shoreline wave power and work at selected sites during a four-year period. The fetch and wave power calculations using GIS provide interesting possibilities for spatial studies concerning shoreline exposure in fragmented archipelago environments. Different kinds of numerical information of the shoreline exposure are required for diverse purposes in coastal regions: the average fetch maps assess effectively the sea area openness, and shoreline exposure and the temporal graphs quantify parameters relevant to littoral processes.
机译：沿海地区的生态和地貌过程受波浪影响很大。尽管其重要性，但在沿海研究中，经常没有将波暴露量化为空间参数。我们提出了三种基于GIS的方法，用于在群岛环境中进行开放性和波浪暴露评估。首先，我们通过获取测量研究开放性：制作了一个海域开放性主题图，该图显示了西南芬兰群岛16 900 km〜2中1 km〜2个研究单元的平均获取长度。其次，我们基于海岸线点的平均波浪功率值计算波浪暴露，以在同一研究区域内创建海岸线暴露分类。最后，我们制作了时间图来研究海岸线波功率的变化以及四年内在选定地点的工作情况。使用GIS进行的取力和波浪功率计算为有关零散群岛环境中海岸线暴露的空间研究提供了有趣的可能性。沿海地区的多种用途需要不同种类的海岸线暴露数值信息：平均提取图可有效评估海域开放度，海岸线暴露和时间图可量化与沿海过程相关的参数。

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