The Application of Multibeam Echosounder to Assess the Dynamics of Bottom Topography of the Black Sea (Site of a Submarine Delta and of Shahe River Canyon)

The monitoring of structures on the shelf to ensure the sustainability of their work prescribed normative documents. The underwater topography and soils is among the most important objects of monitoring. The dynamics of the relief was assessed using geophysical methods. The results of the multibeam echosounding of the gas pipeline section “Dzhubga-Lazarevskoe-Sochi” is attached to the upper part of the canyon the river (Black sea) to the beginning of construction and after completion of the work presented. Performed detailed areal mapping in scale 1:1000 using multibeam echosounder “Reson Sea Bat 7125”. Changes in topography in the three years since the start of the research were recorded. Dropped absolute depth marks in the underwater river bed, the edge of one of ravine tributary of the canyon moved toward the coast at 50 m.