Summary:

Apart from basic model test of hydro technical structures, more often in hy-draulic laboratories experimental works are conducted devoted to the recognition of water flow conditions through various environmental water structures. This kind of research concerns chosen situations accompanying water flow in blurred alluvial troughs, covered with flora, taking fish movement into consideration, on permeable stone constructions, prototype devices, aerators or swirl chambers. From such research we gain fast, often pulsating pressure changes and accompanying them pulsating of flow velocities. They require usage of modern techniques and measuring devices, that utilise high frequency electromagnetic and acoustic impulses. They are also used in field studies as a source of signals for the systems supporting objects' exploitation activities. The majority of national institutes have hydraulic laboratories well-equipped with similar category measuring devices. These are often the same models of meters. It is thus necessary to establish coherent research and result interpretation standards. In the article the meters of water flow velocity used in SGGW Hydraulic Laboratory are described. The principles of these devices' configuration are presented as well as their connection to computer research system of the laboratory. Configuration of measuring apparatus depends on the kind and value of collected data, their reliability, speed of obtaining, transmission and verification. The organisation of research work is discussed as regards water velocity measurements and possibility of utilising the meters in measurements on river structures. The rules of obtaining data, their initial verifi-cation and archiving are presented.