Apparatus for obtaining water quality information, method and system for recognizing water body eutrophication degree

The present invention discloses an apparatus for obtaining water quality information, a method ans system for recognizing water body eutrophication degree. The apparatus includes LED lamps arranged around a filter uniformly for emitting given wavelengths; a filter for blocking light beams except the given wavelengths to collect an optical image; and a CCD light sensor for transforming the opticalimage transmitted to the surface of the CCD light sensor into an electric signal. The technical scheme of the invention is capable of rapidly, high efficiently and conveniently obtaining images with high space resolution and high time resolution, and implementing multidata monitoring and evaluation of the water body entrophication by processing and analyzing the image. The cost of the apparatus is low, and operation is convenient. The invention is capable of replacing laboratory analysis methods or providing assistant support for the laboratory analysis methods, arranging sampling points reasonably and reducing the usage of chemical agents, and overcoming abuses caused by collecting data using remote sensing satellites.