Юрасов С. М.

Purpose. The forecast of a condition of a beach of the city of Nikolayev, the general offers of measures of its protection against degradation. Methods. The forecast of a condition of a beach of the city of Nikolayev is made with use of meth-ods of mathematical statistics and mathematical modeling, the comparative analysis, cartographic and graph analytical researches. Results. The beach of the city of Nikolayev is a strip of coast of the big water object where features of reforming of coasts of reservoirs and the rivers united. The location of the beach on the convex shore of the Bug estuary creates the conditions for the accumulation of sand due to the coastal movement of sed-iments downstream. However, the width of the estuary and the depth contribute to the formation of wind turbulence in the sector S-Z-Pn, which can destroy the beach. On the beach during the spring floods or in severe down pouring phenomena, long-coastal movement of sands in large volumes is possible depending on the duration of strong currents, but the transportation of sediments along the beach does not significant-ly affect changes in the outline of its coastal slope. Significant destruction of the beach can occur from storms of rare recurrence in the sector S-SW. Western frontal storms form a profile of relative dynamic equilibrium and contribute to the movement of sands to depth. When the waves approach at an angle to the shoreline is the longitudinal transport of sand. Protec-tion of the beach from erosion can be done by passive or active methods. Further research will focus on a quantitative analysis of the scenario of sand movement along the beach with its accumulation on the protruding part of the beach (point C) and washing away the accumulated sand to a depth under the influence of western storms. Conclusion. Without acceptance of special measures for protection the beach of Nikolayev in the future will degrade.

Purpose. Spatial analysis of ground water pollution for Kotovskiy district of Odessa region in 2015. Methods. Photometric, gauge, geographic information systems. Results. There are digital maps which show distribution of ground water pollution for Kotovsiy district. There are determined: maximum permissible concentration by oxidation in groundwater and artesian waters in nitrates were observed. The concentration of nitrates in groundwater varies between 2 – 4.9 MPC on over meadow territory and 25% of the territory – 7 MPC. Conclusions. The highest nitrate pollution of groundwater is typical for the eastern part of the Kotovsky district. It is proposed to reduce the amount of nitrate fertilizers, taking into account the vulnerability of groundwater to nitrate nitrogen based on the zoning of the level of contamination of the Kotovsky district of Odessa region.

Approximation of temporal variability of water quality indexes was analyzed by various distribution func-tions (normal, lognormal, Weibull and exponential) for Dnestr river Beliaevka city. Approximation density in-dexes were calculated. Optimal distribution function of water quality indexes was determined.