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This paper presents a survey of the recent results of field observations over near-bottom stratified flows in the abyssal channels of the Atlantic Ocean, as well as the results of mathematical modeling and laboratory experiments related to generic hydrodynamic phenomena. The main attention is devoted to such characteristic features of these flows as splitting of inclined gravity currents, formation of critical layers in the shear flows over the obstacles, and fragmentation of near-field structures formed by the internal stationary waves in the vicinity of complex obstacles.

The main reason for high concentration of nitrite ions in water is the existence of sources of industrial and agricultural pollution. Contamination of drinking water, juices, wine and other liquids of nitrite ions as a result of improper use of nitrogen fertilizers has an adverse effect on living organism, because under the influence of enzymes nitrite ions in living organisms form high carcinogenic nitrosamines, and the interaction of nitrite ions from blood hemoglobin causes such toxicity that leads to disease cyanosis [1]. Therefore removal of nitrite ions from water has received increased attention. The paper discusses an innovative wastewater treatment technology from the nitrite ion with hypochlorite produced during electrolysis.