Each slope
surface runoff field runoff sampler is composed of a sampling
bottle system, a floating ball
system, a floating ball bouncing
system and a water guide groove (5); the sampling
bottle systemincludes a sampling
bottle (1), a sliding groove (6) and a water guide groove fixed ring (12); the floating ball system includes a floating ball (2), a positioning rod (3) and a floating ball
handle(4); the floating ball bouncing system includes a counterweight (7), a dialing rod (8), a lifting
rope (9), a dialing ring (10) and the water guide groove (5). When
earth surface runoff is produced, the runoff first enters the sampling bottle (1) of a first sampler, when a
water level (13) of the sampling bottle (1) rises to a certain height, the floating ball (2) rises, and at the same time, oneend of the water guide groove (5) is lifted up, so the water guide groove is inclined to the reverse direction, a first
water storage bottle finishes sampling; the runoff enters sampling bottles of anumber of samplers along the inclined water guide grooves and is sequentially sampled. The samplers are simple in structure and simple to operate, and are the slope
surface runoff field runoff samplers which can be used for respectively, equally, continuously and automatically collecting runoff samples in the one-time runoff process at different atmospheric rainfall intensities and in different
earth surface runoff intensity periods.