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One of the factors in the formation of the ecological state of a city is the planning scheme of development, reflecting the features of the functional division of city space. At the same time, ensuring environmentally safe urban space involves solving the engineering problem of layout adjusting (optimization, modernization), taking into account the natural factors (terrain, landscape, climate zone) and the economic specialization of the territory. In this context, comprehensive environmental studies should be carried out, the main objective of which is to identify patterns of formation and manifestation of violations of environmentally safe environmental parameters (pollution of soil, air, water, including underground and above-ground sources, sea) in order to overcome or reduce negative processes in the present or in the future. The geoecological mapping of environmental risks in different areas of the city based on the seaside recreational area-Feodosia.

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The urgency of improving methods of engineering and environmental survey of shore protection objects is determined by their existing disruptions, which violate environmental safety as a whole and create a danger for organization of tourism on the coast. The purpose of the study is to specify method of processing information on ecologically significant regularities of processes on the coast, which should be taken into account in the design of biopositive shore protection structures, based on in situ examination of coastal zones and the state of shore protection structures in the Crimea. During the monitoring, methods of field photo-fixation (in dynamics for 2015-2018), mathematical modeling (in determining the area of coast and beach loss), statistical generalizations (when identifying trends in the state of the coast ecology) are used. As a result, the nature and extent of deformations of the coastal zone of the sea and shore protection structures on the coast of the Kalamita Bay of the Black Sea in the area of the village of Peschanoe are identified. The loss of the coastal zone as a result of violations of reinforced concrete shore protection structures by 70-90%, as well as changes in beach areas (erosion, shortening of width, change in the quality of beach material) are revealed. The modeling of the process in the cliff in the zone of influence of the shore protection structures is performed. Studies have made it possible to assess the degree of influence of the technospheric elements (slope-step wave exclusion design) on the ecological state of the coastal zone and to determine the parameters of the organization of engineering and environmental monitoring in the development and operation of shore protection structures, using software.

The existing concepts and modern methods of ensuring the ecological safety of the coastal zone of the sea were analyzed. The article considers modern theoretical developments and methods of choosing design solutions for special structures – various coastal protection structures (permeable, impermeable, made of various building materials, various shapes). This paper suggests a new algorithm for the choice of Bank protection structures intending to ensure environmentally friendly seaside state urban recreation area from the position of the preservation or restoration of the beach zone, which affects the environmental parameters of the site, which consists of a data collection phase of the study object, the selection of natural and technical factors that affect the ecological security of seaside urban recreational areas, the definition of specialization of the coastal zone in terms of recreation attractiveness of the coast, the evaluation phase of the current dynamics of ecological safety of the beach zone of the shore as an important element of seaside recreation of the urbanized area, which affects the level of environmental security in general, stage select bank protection structures and the definition of the projected factors of ecological safety of the beach zone. To check the application of the algorithm of selection structures bridges to ensure environmentally safe condition seaside urban recreational areas allows further justify the selection of the optimal environmental engineering solutions for the protection of the Western coast of Crimea.