Abstract
Based on the data of route inspection and video surveillance of the mudslides of the river Gerkhozhan-Su have been determined the features of the mudslides dynamics in the section of the mudflow tray. Areas of temporary mud accumulation were revealed, over which waves of mudflow periodically passed. Streams rushed through the tray at a speed of 9-12 m/s. The protective role of the mudflow tray and the need for its timely clearing of the mudflow deposits have been highlighted to ensure the anti-flood safety of the city of Tyrnyauz.
Highlights
Gerkhozhan-Su basin is known for catastrophic mudslides that repeatedly caused damage to the city of Tyrnyauz, located in the basin of the river Baksan in Kabardino-Balkaria (Central Caucasus)
The mudflow tray was built to ensure the protection of the city of Tyrnyauz from mudflows, which was reconstructed several times after the destruction
Mudflow-holding dam was built at the distance of 2.3 km from the mouth in the valley of the river Gerkhozhan-Su, which was destroyed by mudslide in 1999
Summary
Gerkhozhan-Su basin is known for catastrophic mudslides that repeatedly caused damage to the city of Tyrnyauz, located in the basin of the river Baksan in Kabardino-Balkaria (Central Caucasus). The mudflow tray was built to ensure the protection of the city of Tyrnyauz from mudflows, which was reconstructed several times after the destruction. Mudflow-holding dam was built at the distance of 2.3 km from the mouth in the valley of the river Gerkhozhan-Su, which was destroyed by mudslide in 1999. At present, to protect the city of Tyrnyauz from mudflows, there is only one antimudflow structure – the mudflow tray, the left wall of which has a length of 720 m, while the right wall is 1325 m long with a gabion extension. The tray widens to 120 m below the bridge. The purpose of this article is examination of the functioning of the mudflow tray during the mudflows of 2011 and 2017
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