The Dinaric karst, a globally recognized geological phenomenon, is prominent in the Republic of Croatia; it is characterized by numerous karst fields known for their exceptional water quality and quantity. This region hosts the highest concentration of hydroelectric power plants in Croatia, reflecting its significance in electricity production. With increasingly extreme precipitation events and surface runoff patterns, there is a growing interest among energy institutions to optimize water utilization. Leveraging natural features like karst fields as managed retentions presents a viable solution.

A specific focus lies on the catchment area surrounding the Gojak hydroelectric power plant near Ogulin, Croatia, where several karst fields experience seasonal flooding. However, uncontrolled water runoff leads to Lake Sabljaci overflowing. To address this issue, a proposal involves controlled water release from the Drežnica field to minimize losses and enhance water management efficiency. The initial step includes sealing the abyssal zone of the field and constructing a hydrotechnical facility for regulated water release.

By integrating the Drežnica field as a retention area alongside the existing infrastructure at the Gojak hydroelectric power plant, a more efficient water management system can be established. This coordinated approach aims to maximize the utilization of water resources for electricity generation, while reducing wastage through uncontrolled overflow. Ultimately, this strategy underscores the sustainable utilization of natural resources to enhance energy production in the region.