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This paper describes a new gaming tool that allows players (e.g. water managers and farmers) to explore the consequences of their interactions in managing river floodplains. To facilitate the process of creating and testing new policies that would help to accommodate disordering events, e.g. floods, we developed a system dynamics model of floodplain agriculture that drives an interactive game. The Floodplain Management Game can be used as an educational resource, knowledge elicitation technique or transition management tool for agriculture and river management. The key feature is that it unites technical (problem-solving) and relational issues in one game. In multiple areas it has proven a useful tool for participants to experience the challenges of policy-making for managing rivers as well as for floodplain agriculture and for scientists to examine how stakeholders make decisions about such options.

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A new water resource planning technique was developed for regional and local levels of water management in Ukraine. For this purpose, methodology, methods and tools, as implemented in the Water Scenarios for Europe and for Neighbouring States (SCENES) project, were studied and adapted to the specific situation of the Crimea pilot area in the South Region of Ukraine. For testing of the new planning techniques, a participatory scenario development process was organised and implemented with Crimean stakeholders. Various facilitation tools and supporting measures were incorporated into the methodology for general scenario development. Causal Loop Diagrams on the problems of irrigation performance in Crimea and enrichment (down and cross scaling) with results from other pilots were also used. These tools increased stakeholders' insights and quality of outcomes and stimulated social learning. The scenario development process ends up in the formulation of storylines, action plans and policy recommendations.

The paper explores the impacts of changes in renewable energy sources (RES) financing in Poland on the profitability of coupled photovoltaic panels and heat pump systems. The profitability analysis is conducted with the use of Net Present Value calculation and the return on investment period. The degree of change in profitability of using photovoltaic panels in Poland is dependent on the method of their financing. The analysis is carried out for two different photovoltaic support schemes: (1) the net-metering scheme currently in force in Poland; (2) the net-billing system scheduled for implementation in the year 2022. It is assumed for the analysis that two alternative heating and electricity supply systems for a single-family building will be operated: (a) a standard solution used in Poland consisting of a natural gas-fired boiler for heating and the purchase of electricity from the power grid, (b) an air/water heat pump used to heat the building, and electricity obtained from photovoltaic panels, also used to power the heat pump. A sensitivity analysis is carried out, examining the impact of several key parameters relevant for the profitability of such investments, such as average annual increase in the purchasing or selling prices of electricity, purchasing prices of natural gas, and inflation rate. The conclusions concern the possible consequences of introducing a new support scheme for photovoltaics in Poland. The highest profitability of all considered solutions is for the current scenario for heat pump and pv installation with the capacity to meet the demand in the last year of operation. The introduction of changes in the new RES law (2021) in Poland will reduce the profitability of investments in pv panels, leading to a slowdown in the investments in the pv installations.