For eight years, an area in Luxembourg measuring about 300 square kilometers was under special surveillance. Research groups from all over Europe analyzed the Attert River catchment area, drones flew over it with thermal imaging cameras, and satellites measured the radiation. Meanwhile, research teams were in the fields determining the composition of the soil. The data was then used for elaborate computer modeling calculations. The aim of these efforts was to solve a mystery that has intrigued people since the beginnings of agriculture: How does water flow on the surface of the Earth and in the ground?
Click here for original story, Researchers use drones to monitor water flows in the ground
Source: Phys.org