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首页> 外文期刊>Geografia Fisica e Dinamica Quaternaria >MAPPING SLOPE INSTABILITY GROUND FACTORS IN THE NATIONAL PARK OF GRAN SASSO - MONTI DELLA LAGA (ABRUZZO, CENTRAL ITALY): RESULTS AND PERSPECTIVES
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MAPPING SLOPE INSTABILITY GROUND FACTORS IN THE NATIONAL PARK OF GRAN SASSO - MONTI DELLA LAGA (ABRUZZO, CENTRAL ITALY): RESULTS AND PERSPECTIVES

机译：GRAN SASSO-MONTI DELLA LAGA（意大利中部阿布鲁佐）国家公园的边坡失稳地面因素：结果与展望

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摘要

The National Park of Gran Sasso-Monti della Laga (Abruzzo, Central Italy) is representative of a mountainous Mediterranean environment, with a range of elevation from 800 to 2900 meters above sea level and commonly occurring landslides, particularly in the northern belt of the Park. Two main geological formation groups are predominant in the area: the oldest one (of the Trias to Miocene periods) consists of marine carbonate rock formations, which have been tectonically overthrusted by more recent siliciclastic formations during the last orogenetic phase of the Central Appennines (Upper Miocene - Lower Pliocene); these are formed mainly by sandstone and marlstone of the Miocene age and bear the name Flysch della Laga,rnThe research carried out on a pilot area of the Park was addressed to obtain a small scale mapping of both distribution and intensity of the slope instability factors. This was accomplished by considering the percentage occurrence of some instability factors, as the ratio of friction-angle to layering dip-angle less than 1, and the occurrence of morphological signs of instability as active talus. The resulting map (IFP) which could be interpreted as expression of potential susceptibility to slope instability, was not similar to a previous instability hazard map of the same area made by traditional parametric methodology. Instead the IFP map compared with actual distribution of instability phenomena (landslides, badlands, active scree deposits, etc.) over the same area resulted positively correlated at 0.99 probability level. The proposed method seems to be able for predicting the susceptibility to instability trend not only over whole territory but also in areas assumed after traditional methods to have homogeneously distributed hazard class.
机译：Gran Sasso-Monti della Laga国家公园（意大利中部阿布鲁佐）是地中海多山的代表，海拔高度在800至2900米之间，并且经常发生滑坡，特别是在公园北带。该地区主要有两个主要的地质地层组：最古老的一个（三叠纪至中新世时期）由海相碳酸盐岩岩层组成，这些岩层在中部附件岩层的最后造山阶段已被较新的硅质碎屑岩构造性地推覆（上层）。中新世-下上新世）;这些主要是由中新世时期的砂岩和马林岩形成的，并以Flysch della Laga的名字命名。研究在公园的试验区进行了研究，以获取坡度失稳因素的分布和强度的小比例图。这是通过考虑一些不稳定因素的发生百分比来实现的，例如摩擦角与分层倾角之比小于1，以及作为活动距骨的不稳定形态征象的出现。结果图（IFP）可以解释为对边坡不稳定性的潜在敏感性表达，与传统参数化方法制作的同一地区以前的不稳定性危害图不相似。相反，IFP地图与同一地区的不稳定现象（滑坡，荒地，活动碎石沉积等）的实际分布进行了比较，得出的相关概率为0.99。所提出的方法似乎不仅能够预测整个地区的不稳定趋势的敏感性，而且还可以预测在采用传统方法具有均匀分布的危险等级之后假设的区域中的不稳定趋势。

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