Estimation methodology and the significance of the atmospheric water exchange flux in the river-lake systems of selected lobelia lakes in the vicinity of the Tri-City in Poland

Abstract The article aims to present the methodology of estimating atmospheric water exchange components in lake. In absence direct precipitation and evaporation measurements, these balance elements need be estimated. However, inadequate selection estimation methods causes incorrect determination hydrological function lake effect it has on formation river drainage. Determination from lake’s surface was based Davidov formula, which considered monthly average temperature a given saturated vapour pressure under mean (TWP) calculated according ISO 13788 standard. interpolation method, is inverse-distance deterministic method (IDW), used calculate reaching surface. calculations were made for three years diverse terms humidity thermal conditions. presented small river-lake system upper Gościcina River catchment, an example postglacial district area. this are lobelia lakes, poorly known circulation. At beginning twenty-first century, unjustified activities regarding assessing circulation conditions led changes relations, causing environmental, financial social losses.