Glaciological Problems Set by the Control of Dangerous Lakes in Cordillera Blanca, Peru. I. Historical Failures of Morainic Dams, their Causes and Prevention
Glaciological Problems Set by the Control of Dangerous Lakes in Cordillera Blanca, Peru. I. Historical Failures of Morainic Dams, their Causes and Prevention
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DOI：
10.3189/s002214300002133x
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发表时间：
1977
影响因子：
3.4
通讯作者：
L. Lliboutry;Benjamín Morales Arnao;André Pautre;B. Schneider
中科院分区：
文献类型：
--
作者：
L. Lliboutry;Benjamín Morales Arnao;André Pautre;B. Schneider
摘要1927年以来，布兰卡山脉冰川的退缩在许多冰川的前端产生了危险的湖泊。所有已知的数据，其中大部分未发表，审查。已知的aluviones上市，和Chavin，Quebrada Los Cedros和Artesoncocha的充分描述。在这三个例子中，前碛的裂口来自于大的冰福尔斯落入湖中。本文介绍了1970年5月31日大地震后，在出口处所做的防护装置以及地震对出口的影响。在拉古纳帕龙，由于渗透保持其水平，报告了1955年至1969年泉水流量与湖面的波动。介绍了降低Parón拉古纳水位和清空Safuna阿尔塔的项目。地震后，后者实际上通过管道部分排空，从而最终解决了问题。
Abstract The retreat of glaciers since 1927 in Cordillera Blanca has produced dangerous lakes at the front of many glaciers. All the known data, most of them unpublished, are reviewed. The known aluviones are listed, and those of Chavin, Quebrada Los Cedros and Artesoncocha described in full. In these three cases a breach in the front moraine came from big ice falls into the lake. The protective devices made on the outlets are described, as well as the effects of the big earthquake on 31 May 1970. In the case of Laguna Parón, which keeps its level thanks to infiltrations, the fluctuations of the discharge of the springs as related to the level of the lake from 1955 to 1969 are reported. The projects for lowering the level of Laguna Parón and for emptying Safuna Alta are described. The latter partially emptied in fact by piping after the earthquake, allowing a final solution.