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首页> 外文期刊>Geomorphology >The late Little Ice Age landslide calamity in North Bohemia: Triggers, impacts and post-landslide development reconstructed from documentary data (case study of the Kozi vrch Hill landslide)
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The late Little Ice Age landslide calamity in North Bohemia: Triggers, impacts and post-landslide development reconstructed from documentary data (case study of the Kozi vrch Hill landslide)

机译：北波西米亚的小冰河时代晚期滑坡灾害：从文献资料中重建的触发因素，影响和滑坡后发展（以科齐vrch Hill滑坡为例）

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摘要

The beginning of the 1770s in the Czech Lands is well documented for its meteorological extremes and their social impacts. However, the effects of these extremes on geomorphic systems and on landslide occurrence and activity in particular have been minimally studied. In this paper, we use a complex set of written and iconographic documentary data to reconstruct the landslide calamity in North Bohemia, with a detailed case study of the Kozi vrch Hill landslide. The landslide calamity of 1770 is the oldest known landslide calamity in this region, including 14 documented events; and its reconstruction may therefore provide important data on landslide frequency, triggers, and impacts during the adverse weather patterns in the last part of the Little Ice Age (LIA). We focus on a case study of the Kozi vrch Hill landslide, and we use the documentary evidence and field techniques to reconstruct its location, extent, topography, kinematics, and triggers. Based on precipitation indices and weather descriptions, the extremely wet and rainy preceding year and the 1769/1770 winter were the major triggering factors that resulted in water saturation of Neogene volcaniclastics underlying the basalt lava flows and their subsequent collapse. Furthermore, we analyse the post-landslide terrain transformation and land use patterns during the 240 years following the landslide to illustrate the persistence of particular landslide features. We conclude that the major transformations, which obscured most of the landslide features, occurred in only the last 50-60 years. Finally, we discuss the role of documentary data and the current methodological advances in their use for the reconstruction of landslide frequency and impacts during the LIA. (C) 2015 Elsevier B.V. All rights reserved.
机译：捷克土地上1770年代初的气象极端事件及其社会影响已得到充分记录。但是，这些极端现象对地貌系统的影响，特别是对滑坡发生和活动的影响，已被最少地研究。在本文中，我们使用一组复杂的书面和影像文献数据来重建北波西米亚的滑坡灾害，并以Kozi vrch Hill滑坡为例进行了详细的案例研究。 1770年的滑坡灾害是该地区已知的最古老的滑坡灾害，包括14个记录在案的事件；因此，其重建可能会提供有关小冰期（LIA）后期不利天气模式期间滑坡发生频率，触发条件和影响的重要数据。我们重点研究Kozi vrch Hill滑坡的案例，并使用文献证据和野外技术来重建其位置，范围，地形，运动学和触发因素。根据降水指数和天气描述，前一年的极端多雨和多雨以及1769/1770年的冬季是导致玄武岩熔岩流下新近纪火山碎屑岩水饱和并随后塌陷的主要触发因素。此外，我们分析了滑坡发生后的240年间的滑坡后地形变化和土地利用模式，以说明特定滑坡特征的持久性。我们得出的结论是，仅掩盖了大多数滑坡特征的重大转变仅在最近50至60年内发生。最后，我们讨论了文献资料的作用以及在重建LIA期间滑坡频率和影响重建中使用的文献资料方法的最新进展。 （C）2015 Elsevier B.V.保留所有权利。

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