Extreme weather is in the attention focus of many scientists and managers during the last decades. The leading aspect of these phenomena investigations in the recent years is the risk of material and human losses and damage mitigation. Especially, the interest is with regard to effects of weather extremities on natural systems and social processes such as land use practices, water resources management, emergency management, and planning. The main objectives of the investigations are clarifying of spectrum, space and time regularities of extreme weather events occurring in Ukraine as well as their intensity, duration, daily and seasonal variation, spreading, recurrence in the regions, and their changes analyzed. Applying statistical and geographical space-time analyses, the main regularities of the extreme weather events' occurrence have been described as well as the trends and intensity of the extreme weather regime changes in Ukraine have been calculated and assessed.

Paper deals with the short analysis of vertical and horizontal river beds deformations which are developed due to intensive gravel mining within the river channels and floodplains of the Upper Dnister catchment. These processes and water regime changes have noticeable impact upon the hydroecological state of the small river systems and ecological problems in their catchments. Regressive river bed erosion is especially dangerous for buildings, economical objects, engineering and transport infrastructure. Based on the main results obtained due to the analysis of the recent monitoring, field, stationary and semi-stationary observations data the scales, main tendencies and intensity of erosion and accumulation processes have been ascertained. Main ecological consequences and optimization measures for the processes regulating and risk mitigation are discussed as well.

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Ukraine, as a member of the European Energy Community, has committed itself  to achieve a share of 12 % renewables in its final energy generation by 2025 and a share of at least 25 % by 2035 (including all hydropower and thermal energy capacities). In 2019, the share of renewables in electricity generation in Ukraine was only 4 %. Renewables produce 4 % of total electricity production in Lviv region. According to this indicator, the region is the leader in the Western Ukraine. The paper analyzes the geographical location and the current state of renewable energy facilities in the Lviv region and forecasting their further development. As of July 1, 2020, in Lviv region there are 67 renewable energy facilities with a total capacity of over 310 MW. Most of the renewables supply electricity to the integrated energy system at a “green” tariff. They include two wind power plants with a total capacity of 33.9 MW in Staryy Sambir district; 59 industrial solar power plants with a total capacity of over than 275 MW in 15 administrative districts of Lviv region, Boryslav and Chervonohrad cities; two mini hydropower plants with a total capacity of 0.576 MW in Drohobych and Turka districts; three mini heat and electricity production plants running on biomass and producing electricity and thermal energy (Radekhiv heat and electricity production plant with a capacity of 2.4 MW, other heat and electricity production plants with a total capacity of 3.66 MW); one biomass electricity production plant operating in the Eco-Mit LLC pig farm in the village of Batyatychi in Kamianka-Buzka district. In addition, 985 solar electricity production plants at private households were built in 20 administrative districts and 9 cities in the region. Their total capacity is over 19 MW, which is equivalent to average capacity of one industrial solar electricity production plant. The leader in the number of industrial facilities for renewable energy is Yavoriv district, where almost half of the total renewables’ capacity of Lviv region is concentrated. The largest number of solar electricity production plants of private households is located in Pustomyty and Yavoriv districts, and Lviv city, whereas the lowest number in mountainous areas, particular in Turka and Skole districts. As of January 1, 2020, solar energy constituted 70 % of renewable energy in Lviv region. At the same time, according to the Development Strategy of Lviv region for the period of 2021–2027, the largest share in the structure of electricity production belongs to wind energy. The development of renewable energy in Ukraine depends on the rate of “green” tariff. The actual financial stimulus has led to a rapid increase in the share of renewables in total electricity generation in Ukraine and Lviv region in particular. Promising areas for renewable energy in Lviv region are wind and bioenergy developments.

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