DEBRIS-FLOW PROCESSES FEATURES IN THE KARGALINKA RIVER BASIN 23 JULY 2015
Keywords:
debris flow, water flow, sediment, loess, solid concentration in debris-flow mass, moving and confining forcesAbstract
23 July 2015 debris flow differed from debris flows typical for the Ile Alatau due to the features of the main factors of debris-flow forming and debris-flow path in the Kargalinka River valley radically. The debris-flow discharge does not exceed 100...150 m3/s. The sharp broadening of the valley in the dam site and the low value of debris-flow mass plasticity led to that the velocity of «liquid» part of the debris-flow mass ahead of the velocity of coarse grains. Partial filling a storage reservoir by mud induced the offdesign debris-flow discharge in the tail-water of the dam. It led to secondary formation of a debris flow, which caused great economic damage.
References
Степанов Б.С., Яфязова Р.К. Климат и ландшафты центральной части северного склона Заилийского Алатау / Современные проблемы геоэкологии и созологии. – Алматы, 2001. – С. 138-142.
