The Evaluation of Stormwater Runoff

Conventional wastewater flow measurement techniques are difficult to apply for stormwater runoff. Therefore, a strong need for the new types of flow measurements is foreseen, especially in the existing urban areas. Water level was measured applying a hydrostatic level meter and flow was calculated according to typical hydraulic relationship. The theoretical flow rate was calculated based on rain gauge data from the nearest metrological station. Following gauge data, the calculated storm water runoff was almost two times higher than the measured one. Differences in flow data will lead to uncertainties in statistical reports and misunderstanding between different authorities. The measurements of storm water flows are necessary, because they are associated with emission accounts, taxes on pollution and improvements to environmental quality. Article in Lithuanian