Monitoring system and method for river channel-lake water and sand mutual feedback experiment in complicated conditions

The invention discloses a monitoring system and method for river channel-lake water and sand mutual feedback experiment in complicated conditions. The system includes a lake with inlet river channelsand outlet river channels; the inlet river channels are connected to inlet water and sand control systems; the outlet river channels are connected with an outlet water and sand recovery system; each inlet water and sand control system includes a water and sand mixing pool, a water and sand storage pool and an exit gate, wherein a water inlet pipe and a sand inlet funnel are arranged on the upper part of the water and sand mixing pool, and the water and sand mixing pool and the water and sand storage pool are connected by a pumping pipeline; sensors are arranged in the lake, the inlet river channels and the outlet river channels; the sensors are connected to data acquisition devices through data lines; and the outlet water and sand recovery system includes a sedimentation tank, a sand separation baffle and a backwa