Abstract
The Infrared PTV (Particle Tracking Velocimetry) is proposed for applications to measurements of surface velocity fields of local water bodies, such as rivers, lakes, ponds, estuaries and coastal areas. The tracers are either ice particles or soaked and frozen flat edible cakes. The cameras are infrared sensitive. PTV algorisms can be applied to the infrared particle images. The system can measure detailed surface velocity fields of floods even in the darkness. No or negligible pollutant is supplied respectively by the ice particles or the flat cakes.
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