Kiertoveden

Kiertoveden is a Finnish term used in hydrology and water management to refer to the circulating water within a system. It encompasses the continuous movement and exchange of water among the components of the hydrologic cycle, including precipitation, evaporation, condensation, surface runoff, infiltration, groundwater flow, and discharge. In natural environments, kiertoveden describes how rivers, lakes, wetlands, and aquifers are interconnected through water flow, determining water availability, nutrient transport, and ecosystem health.

In engineered contexts, kiertoveden can refer to closed or semi-closed water circuits used in thermal or industrial processes. Such circuits circulate water that is treated and reused to reduce fresh-water demand and minimize environmental impact. Residential or commercial buildings may use kiertoveden-style loops for heating and cooling, while power plants use circulation systems to remove excess heat.

Measuring and modeling kiertoveden relies on hydrological balance calculations, tracer tests, hydraulic modeling, and in groundwater contexts Darcy's law and aquifer characterization. Key concepts include residence time, mass balance, and hydraulic connectivity between reservoirs.

Management and policy focus on preserving the integrity of kiertoveden while ensuring reliable water supply, flood control, and contamination prevention. Sustainable practices include reducing leakage, improving treatment, and optimizing recycling within closed loops.

See also: Hydrological cycle, groundwater, surface water, water management, cooling systems.