Intelligent monitoring device of lake-inlet hay quantity and hay nitrogen and phosphorus pollution lake-inlet calculation method

The invention discloses an intelligent monitoring device of lake-inlet hay quantity and a hay nitrogen and phosphorus pollution lake-inlet calculation method. The intelligent monitoring device comprises a plurality of monitoring points, wherein the plurality of monitoring points are arranged along lakeshore, the monitoring points are arranged at intervals, each detection point comprises a detection region with known width, a mark rod is fixed in the detection region along a width direction of the detection region per a certain distance, a mark point is arranged below the mark rod and is used for being detected by a camera, the camera is arranged outside the detection region, mark point images of all mark rods can be simultaneously acquired, the distance from each mark rod to the camera isa preset value, the camera is a high-definition camera, two detection regions are arranged at each monitoring points, each detection region comprises respective mark rod and the camera, and the mark rods and the cameras of th