Abstract
In this chapter, we analyze seven events of debris flow in the tributary network of the middle Struma River Valley. Features and sediments resulting from debris flows and the hydrometeorological background of their activation are described. In order to define the type of the debris flow, we have used sedimentological analyses, generalized in cumulative curves and tables. Data from laboratory analyses showed the predominance of coarse materials (gravels and sands up to 90%). In May 2010, debris flows were triggered by a weather situation typical of the region: an invasion of a cold front combined with a warm, moist, and unstable air mass arriving from the southwest. We have made a general assessment of the mitigation activities and found that its best solution is by using gabions, which support large blocks and, at the same time, allow water and fine fractions to pass through.
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Kenderova, R., Baltakova, A., Ratchev, G. (2013). Debris Flows in the Middle Struma Valley, Southwest Bulgaria. In: Loczy, D. (eds) Geomorphological impacts of extreme weather. Springer Geography. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6301-2_18
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