The article deals with the problematic aspects of mutual coordination of actions between society and nature in the process of applying the tools for regulating the use of both water, fish, and land resources. In this context, the basic principles of forming the mechanism of functioning of the circular economy are studied. Strategic directions of identification of basic bases and search of modern economic models of development, which could positively influence communications between economic growth and depletion of water, fish, and land resources for their preservation, are substantiated. It is established that the strong economic development of the national economy affects the increased use and depletion of resources, including land underwater in the new economic conditions. It is proved that the maximum conservation of resources contributes to the growth of capital productivity, which leads to an increase in the amount of profit at the micro level and improvement at the macro level of macroeconomic indicators, including gross domestic product and net national product. Approaches to determining the index of assessment of the degree of integration of the circular economy are considered. The following indices are offered for practical use: The Material Circularity Indicator (MCI), The Regional Circular Economy Index System (RCEIS), The Circular Economy Performance Index (CEPI), A Circular Economy Index for the Consumer Goods Sector (CEICGS), Circular Economy Development Index (CEDI). Emphasis is placed on the approbation of regulatory measures, which are carried out under the condition of realization of the concept of the circular economy through the creation of additional stages of waste processing (Ev1), prolongation of service life (Ev2), and destruction of unprocessed waste. The expediency of the introduction of the newest tools, measures, methods, and mechanisms of regulation of the process of resource saving with the application of an economic model with orientation on aspects of bioeconomy through the model of circular economy is substantiated. When applying the latest economic model, we can anticipate and maximize the available water, fish, and land resources by minimizing the occurrence and destruction of unprocessed waste, as well as extending the service life of products
circular economy; regulation; mechanisms; indices; branch; indicators; tools; gross domestic product; resources; model