Conditions and triggers of landslides on flysch slopes in Istria, Croatia

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY

Engineering Review Pub Date : 2020-04-01 DOI:10.30765/er.40.2.09

S. Jovancevic, J. Rubinić, Ž. Arbanas

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引用次数: 2

Abstract

The paper gives a review of conditions and triggers in which landslides occur on flysch slopes in central and northern Istria. The north-eastern part of the Istrian Peninsula, the so-called Gray Istria, consists of Paleogene flysch rock mass. Landslides in this area are usually triggered by heavy rainfall together with human activity which changes slope geometry and assists in retaining surface water in the sliding zone. Briefly, hydrogeological conditions in combination with ground water levels and pore water pressures increase, lead to numerous instability phenomena, during the long and continuous rainfall periods. Instabilities usually include small rotational and translational landslides, and it is seldom that debris flows and rock falls occur. Landslides are evenly evidenced in the first part of winter and the early spring time which corresponds to the second rainfall peak. The analyses performed based on landslide documentation and rainfall historical data, show rainfall trends associated with landslide occurrence. Depending on meteorological, hydrological and geological conditions, cumulative rainfall which triggered landslide activation varies inside a three-month period. The results presented show rainfall trends which serve as characteristic landslide triggers on flysch slopes in north-eastern part of Istria.

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克罗地亚伊斯特里亚复理石边坡滑坡的条件和诱因

本文综述了伊斯特拉中部和北部复理石坡上发生滑坡的条件和触发因素。伊斯特拉半岛的东北部，即所谓的灰色伊斯特拉，由古近系复理石岩体组成。该地区的滑坡通常是由暴雨和人类活动共同引发的，这些活动改变了斜坡的几何形状，并有助于在滑动区保留地表水。简而言之，在长而连续的降雨期间，水文地质条件与地下水位和孔隙水压力的增加相结合，导致了许多不稳定现象。不稳定通常包括小的旋转和平移滑坡，很少发生泥石流和岩崩。塌方在初冬和早春期间较为明显，与第二次降雨高峰相对应。根据滑坡记录和降雨历史数据进行的分析显示了与滑坡发生相关的降雨趋势。根据气象、水文和地质条件的不同，引发滑坡激活的累积降雨量在三个月内是不同的。结果表明，降雨趋势是伊斯特拉东北部复理石坡上特有的滑坡触发因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.