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首页> 外文期刊>Estuarine Coastal and Shelf Science >Morphometric assessment of intermittently open/closed coastal lagoons in New South Wales, Australia
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Morphometric assessment of intermittently open/closed coastal lagoons in New South Wales, Australia

机译：澳大利亚新南威尔士州间歇性开/关沿海泻湖的形态计量学评估

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This paper provides a framework for the assessment of the natural sensitivity of coastal lagoons to anthropogenic and other external inputs. The assessment framework is based on analysis and consideration of morphometric characteristics, and is demonstrated in this paper using eight example intermittently open coastal lagoons from New South Wales, Australia. The framework presented extends to a rudimentary classification of the eight example coastal lagoons, relative to the other 70 or so intermittently open coastal lagoons in NSW, which can be used to provide an indication of the relative importance of these lagoons with respect to future management, such as remediation or conservation. Morphometry describes the physical geographic characteristics of waterways such as coastal lagoons. Morphometric parameters are relatively easy to determine, as they essentially describe the physical and topographic features of waterways. Morphometry therefore provides a simple means to define the natural sensitivity, or vulnerability, of individual systems to external loads and other artificial (primarily anthropogenic) modifications. Morphometric parameters, such as waterway area, waterway volume, waterway shape and the proportion of time that the entrance is either open or closed to the ocean, have been used to define three separate factors that each measures one aspect of the natural sensitivity, or vulnerability, of a coastal lagoon to external loads and other inputs. The first factor (called the Evacuation Factor) is a measure of how efficiently a coastal lagoon can remove pollutants and other inputs through tidal flushing (i.e. the tidal flushing efficiency). The second factor (called the Dilution Factor) is a measure of the relative difference between the input loads from the catchment and the resident volume of the coastal lagoon. The third factor (called the Assimilation Factor) is a measure of the water level variability in a coastal lagoon, which can subsequently influence the extent and diversity of biological processes and their capacity to assimilate or accommodate external inputs. The morphometric-based assessment and classification framework presented in this paper could be applied to any country that contains a series of similar coastal lagoons that have intermittent connections to the ocean and which requires a relative assessment for prioritisation of future management and planning.
机译：本文为评估沿海泻湖对人为和其他外部投入的自然敏感性提供了一个框架。该评估框架基于对形态特征的分析和考虑，并使用来自澳大利亚新南威尔士州的八个示例性间歇开放沿海泻湖进行了演示。提出的框架相对于新南威尔士州的其他70个左右间歇开放的沿海泻湖，对八个示例性泻湖进行了基本分类，可用于说明这些泻湖在未来管理方面的相对重要性，例如修复或保护。形态计量学描述了诸如沿海泻湖之类的水道的物理地理特征。形态参数相对容易确定，因为它们本质上描述了水路的物理和地形特征。因此，形态计量学提供了一种简单的方法来定义单个系统对外部负载和其他人工（主要是人为的）修改的自然敏感性或脆弱性。形态学参数（例如水道面积，水道体积，水道形状以及入口对海洋开放或关闭的时间比例）已被用来定义三个独立的因素，每个因素都测量自然敏感性或脆弱性的一个方面，一个沿海泻湖到外部负载和其他输入。第一个因素（称为疏散因子）是衡量沿海泻湖如何通过潮汐冲刷去除污染物和其他投入物的效率（即潮汐冲刷效率）。第二个因子（称为“稀释因子”）是对来自集水区的输入负荷与沿海泻湖居民量之间的相对差的度量。第三个因素（称为同化因子）是沿海泻湖中水位变化的量度，其随后可能影响生物过程的程度和多样性以及它们吸收或适应外部输入的能力。本文介绍的基于形态计量学的评估和分类框架可以适用于包含一系列类似的沿海泻湖的国家，这些泻湖与海洋之间存在断续的联系，并且需要相对评估来确定未来的管理和规划的优先次序。

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