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Ravine


Gully: a steep-sided valley, often branched, formed as a result of active activity of temporary water flows

Source: "SAFETY IN EMERGENCY SITUATIONS. MONITORING AND FORECASTING OF DANGEROUS GEOLOGICAL PHENOMENA AND PROCESSES. GENERAL REQUIREMENTS. GOST R 22.1.06-99"

(approved by the Decree of the State Standard of Russia dated May 24, 1999 No. 177)

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