Kuzyk I. Ternopil city complex green zone: geoecological grounds sustainable functioning

The object of study is a Ternopil city complex green zone. The purpose of the dissertation research is to assess the functional and spatial parameters of the Ternopil city complex green zone and substantiate the criteria for its sustainable operation. The scientific novelty of the obtained results lies in the assessment of the functional-spatial parameters of the Ternopil city complex green zone and the development of criteria for its sustainable operation. The thesis analyses legal base for city complex green zone functioning. We generalize conceptual and terminological system forresearching city complex green zone, and specify this concept. The author develops and justifies an algorithm for studying the city complex green zone. The research assesses ecological functions of Ternopil city complex green zone, in particular the oxygen production and carbon dioxide assimilation, phytoncide, plantings resistance to gas and dust emissions, and water regulation capacity. We established that the forests of Ternopil city complex green zone produce an average of 981.4 tons of oxygen and absorb 1226.7 tons of carbon dioxide per day. We estimated the Ternopil city complex green zone functions and calculated that Ternopil districts population provision with limited use green spaces equals 4.5 m2 / person and with public use green spaces equals 21 m2 / person. The greening norm in the settlement zone is 89 m2/ person, and the coefficient of urban green spaces general use is equal to 24 %. The study also determines parks recreational capacity (13,037 individuals), Ternopil reservoir with the coastal territory recreational capacity (5500 individuals), forests of the forest-park part recreational capacity (17,850 individuals). The thesis justifies 56 criteria for sustainable city complex green zone functioning. SWOT-analysis shows strong and weak sides of Ternopil city complex green zone, opportunities and threats for its sustainable functioning. We determined that the total area of Ternopil city complex green zone equals 9966 ha and analyzed its structure. The normative area is calculated to be 13470 ha, thus, the planting deficit is equal to 3504 ha. The author developed an optimization model for village councils land use within Ternopil city complex green zone. The research motivates reduction of arable lands within the analyzed territory by 25 % in average, forest cover increase by 15 %, and rising the pastures and hayfields share to 24 %. The implementation of such measures will increase the share of natural lands within the administrative territories of Ternopil city complex green zone from 25 to 50 %.