V. A. Ivanov, V. V. Fomin, A. A. Polozok
Marine Hydrophysical Institute of RAS, Sevastopol, Russia
Abstract
The research is dedicated to the anomalies of coastal waters spatial structure caused by the existence of an underwater pollution source in a stratified environment. For quantitative estimation numerical modeling has been used. The purpose of the research is to analyze the sewage pipe production in the Blue Bay of Sevastopol. The seawater vertical stratification of temperature (T) and salinity (S) corresponds to the spring period. The source running leads to the contaminated water flow and torch emergence. After disconnecting the source, the torch is detached from the source, the polluted area is shifted downstream. The pycnocline layer (7 – 10 m), where the contaminated area reaches 0,3 – 120,5 km2 , is an object of the biggest pollution. The increase of the current speed vertical shift leads to the increase of polluted zones existence time, the stream of polluted waters shifts towards the sea surface, becomes more localized vertically. Contaminated waters have negative anomalies T and S, reaching in the pycnocline – 2.1° C and – 1.7 ‰, respectively. The negative anomalies T and S values are proportional to the magnitude of the background current speed vertical shift.
Keywords
coastal zone, anthropogenic impacts, underwater source, vertical shift of current velocity, numerical simulation