Mountain permafrost and recent Alpine rock-fall events: a GIS-based approach to determine critical factors and runout zones
Mountain permafrost and recent Alpine rock-fall events: a GIS-based approach to determine critical factors and runout zones
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山区永久冻土和最近的高山落石事件：基于 GIS 的方法来确定关键因素和运行区
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
W. Haeberli
中科院分区：
文献类型：
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作者：
J. Noetzli;M. Hoelzle;W. Haeberli
冰川退缩和多年冻土变化与气候变化有关，被认为会影响寒冷山脉陡峭岩壁的稳定条件。20世纪发生在欧洲阿尔卑斯山的几次落石事件可能与温暖的永久冻土有关。这项研究对落石事件进行了系统的参数化，以增加关于山区永久冻土区岩石不稳定形成的热和地形条件的信息。通过应用经验规则或基于地理信息系统的空间模型，对历史记录的起始区的热条件进行参数化；斜率由数字地面模型得出。尽管到目前为止记录的事件数量相对较少(约20次)，但第一个结果清楚地表明，必须将永久冻土因素与从高山坡上落下的岩石联系起来考虑。
Glacier retreat and permafrost changes, as related to climate change, are supposed to affect sta- bility conditions of steep rock walls in cold mountain ranges. Several rock-fall events, which have occurred in the European Alps during the 20th century, are possibly related to warm permafrost. This study undertakes a systematic parameterization of rock-fall events in order to increase information about thermal and topographic conditions under which rock instabilities develop in areas of mountain permafrost. Thermal conditions of historically documented starting zones are parameterized by applying either empirical rules or GIS-based spatial models; slope is derived from DTMs. Despite the relatively small number of events documented so far (around 20), the first results presented clearly indicate that the factor ‘permafrost’ must be considered in con- nection with rock-falls from high mountain slopes.