A good example of sun glitter while the drone raises and films oriented towards the sun, however it can be helpful to determine a correlation between surface reflectance and roughness, and related flow speed.
What´s beneath the following flow pattern ? Drone zenithal view subsequently vectorized with LSPIV. You´ve got it; just this groyne when submerged flow begins !
Tests at Castejon de Ebro: Checking heights for look angles, fields of view and resulting flow resolution around Castejon railway bridge, during the dry season . This is a key reach for monitoring the Ebro river during flood periods.
A rather complex process, which can lead to spectacular images of mixing eddies. Practical questions like: what´s the mixing length, the influence of each stream speed and width, and how do they change along the interface, can be derived for simple cases with math models.
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