Thermokarst Lake Morphometry and Erosion Features in Two Peat Plateau Areas of Northeast European Russia
Thermokarst Lake Morphometry and Erosion Features in Two Peat Plateau Areas of Northeast European Russia
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俄罗斯东北欧两个泥炭高原地区热岩溶湖形态和侵蚀特征
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发表时间：
2013
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通讯作者：
P. Kuhry
中科院分区：
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作者：
Y. Sjöberg;G. Hugelius;P. Kuhry
对俄罗斯欧洲东北部的两个泥炭高原地区进行了高分辨率卫星遥感分析（n = 637个湖泊）和实地测量（n = 29个湖泊），以调查湖泊形态，绘制海岸线侵蚀指标并评估湖泊和海岸形态可能的方向模式。该研究首次详细描述了有机地形中热喀斯特湖的形状和大小。两个研究区的湖泊覆盖面积分别为 7.0% 和 13.6%，湖泊面积中位数分别为 184 平方米和 265 平方米。在这两个地区，大多数湖泊都有类似的西北到东南方向，海岸通常面向东北或西南。沿着面向东北或东南的海岸以及沿着较大湖泊的海岸线，海岸通常更陡峭并且有更多的裂缝，并且湖泊深度更大。具有泥炭基质的海岸在陡度、裂缝和水深方面比具有矿物基质的海岸更加不均匀。由于湖泊普遍较小，海岸线/面积比率较高，大部分泥炭高原地区可能受到海岸线侵蚀的影响。版权所有 © 2012 约翰·威利父子有限公司
High‐resolution satellite remote sensing analysis (n = 637 lakes) and field measurements (n = 29 lakes) of two peat plateau areas in northeast European Russia were carried out to investigate lake morphology, map shoreline erosion indicators and assess possible orientation patterns in lake and shore morphology. The study includes the first detailed characterisation of the shape and size of thermokarst lakes in organic terrain. The area covered by lakes is 7.0 per cent and 13.6 per cent, and median lake size is 184 m2 and 265 m2, respectively, for the two study areas. In both areas, most lakes have a similar northwest to southeast orientation, and shores most commonly face northeast or southwest. The shores are generally steeper and have more cracks and lake depths are greater along shores facing northeast or southeast, and along the shorelines of larger lakes. Shores with a peat substrate are more heterogeneous than those with a mineral substrate in terms of steepness, cracks and water depths. Since the lakes are generally small, the shoreline/area ratio is high and a large part of the peat plateau areas can potentially be affected by shoreline erosion. Copyright © 2012 John Wiley & Sons, Ltd.