Glacial Lake Outburst Floods (GLOFs) in the Cordillera Huayhuash, Peru: Historic Events and Current Susceptibility
Glacial Lake Outburst Floods (GLOFs) in the Cordillera Huayhuash, Peru: Historic Events and Current Susceptibility
复制标题
秘鲁瓦伊瓦什山脉冰川湖溃决洪水 (GLOF)：历史事件和当前的敏感性
作者：
J. Baťka;V. Vilímek;E. Štefanová;S. Cook;A. Emmer
本文的目的是建立一个冰湖库存的科迪勒拉Huayhuash在秘鲁和评估湖泊的敏感性，冰川湖溃决洪水（GLOFs）的产生。利用高分辨率卫星图像，我们进行了定性和定量分析的湖泊类型，特点和分布，并把我们的调查结果的范围内现有的秘鲁全国湖泊库存。我们还绘制和分析了过去的GLOFs，揭示了总共10个GLOFs和4个模糊事件，其中大部分以前没有报道过。我们发现，过去的GLOFs通常发生在冰碛坝溃决的结果在湖泊演化的前冰期阶段。此外，我们使用我们的湖泊清单来评估所有大于20，000 m2的湖泊的GLOF敏感性。在46个评估的湖泊中，只有两个湖泊（察克拉湖和W014湖）目前容易产生GLOF，这很可能是由于上游较小湖泊的洪水造成的大坝漫顶。湖泊演变的未来前景和对GLOF灾害管理的影响进行了讨论，在小冰期后冰川冰损失以及在附近的科迪勒拉布兰卡进行的广泛的相关研究的背景下。
The aim of this paper is to create a glacial lake inventory for the Cordillera Huayhuash in Peru and to evaluate the susceptibility of lakes to the generation of glacial lake outburst floods (GLOFs). Using high-resolution satellite images, we undertook qualitative and quantitative analysis of lake type, characteristics and distribution, and placed our findings within the context of existing Peru-wide lake inventories. We also mapped and analyzed past GLOFs, revealing a total of 10 GLOFs and 4 ambiguous events, most of which have not been reported before. We found that past GLOFs usually occurred as a result of moraine dam breach during the proglacial stage of lake evolution. Further, we used our lake inventory to evaluate GLOF susceptibility of all lakes larger than 20,000 m2. Of 46 evaluated lakes, only two lakes (Lake Tsacra and Lake W014) are currently susceptible to generating a GLOF, which would most likely be through dam overtopping resulting from a flood originating in smaller lakes located upstream. The future perspectives of lake evolution and implications for GLOF hazard management are discussed in light of the post-Little Ice Age glacier ice loss as well as in the context of extensive related research undertaken in the nearby Cordillera Blanca.
影响因子：
6.3
作者：
Mergili, Martin;Pudasaini, Shiva P.;Frey, Holger
通讯作者：
Frey, Holger