Abstract
River Tergi, Aragvi and Asa-Arghuni, which occupy significant area of mountainous region of central Caucasus, by its geographic location, strategic meaning, peculiarities of natural landscape and infrastructural objects (Trans-Caucasian highway, gas pipeline, water supply of the capital, Gudauri ski-mountainous complex) minerals, historic-ethnographic monuments, opportunities for development of mountainous tourism and mountaineering, where more important engineering projects are being planned; all the above give perspective of development of economic base, employment of the population and restoration of motivated villages, more over that the major part of their perimeter represents state border. At the same time, extremely complex relief, landscape-climatic conditions and sensitive geologic environment have been always defining peculiarities of settlement of population and agricultural activities and determining landscape-ecologic balance of geographic environment. However, whereas amount of land for optimal adaptation is extremely limited, its irregular adaptation causes critical degradation-devastation of lands. Consequently, this causes development of scaled and diverse geologic processes (land-slides, debrisflow, erosion, etc.), which have been complicated anyway and are followed by enormous material loss, forcing thousands of people to leave their homes, emptying if tens of villages and human sacrifice. The article considers conditions of development of a catastrophic debrisflow, which occurred in Dariali in the year 2014 and its negative consequences.
Highlights
Study area includes central part of Kavkasioni’s main range, namely the Tergi Valley (coordinates: 42 ̊43'34.39"N; How to cite this paper: Gaprindashvili, G. and Gaprindashvili, M. (2015) Catastrophic Debrisflow in Dariali (Georgia) in the Year 2014
Tergi Valley is situated on a north plateau of Kavkasioni and includes ethnic Khevi (Figure 1)
In the center of forming of the catastrophic debrisflow of May 17, 2014, which was characterized with avalanche of rocky-avalanche type rock and glacial mass, which was followed by interaction of the given mass and ice stream and its transfer into the gorge of the river Tergi, new deformations and abruptions are not observed if not take into account crevice in the glacier
Summary
Study area includes central part of Kavkasioni’s main range, namely the Tergi Valley (coordinates: 42 ̊43'34.39"N; How to cite this paper: Gaprindashvili, G. and Gaprindashvili, M. (2015) Catastrophic Debrisflow in Dariali (Georgia) in the Year 2014. Tergi gorge is antecedent down Stepantsminda settlement It is cut in axial zone and represents narrow mountainous corridor. Gorges of the river Devdoraki and Amali are of glacial origin. To the West of the junction of rivers Devdoraki and Amali there is formed a step, which rises over the existing bed by 60 - 75 meters. From the point of junction of the rivers Devdoraki and Amali in both ways towards the flow there is observed 2 terraced steps, which rise over the bed by 30 - 60 m. They are located on a comparative height. Of the gorge, there is a 300 - 500 m length step of Vurmian glaciation, which is paved with moraine plain Holocene glaciation, on the surface of which lakes are formed
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