The utility model belongs to ecological environment engineering field, specifically speaking is a test device of simulation increase and decrease rain, including subtracting rain system, header tank, water pump and increasing the rain system, header tank and water pump are connected in subtracting the rain system and increasing between the rain system, simulate increase and decrease rain when experimental, establishing proportion's rainwater can be through subtracting during the rain plate current goes into the water catch bowl among the natural rainfall process to enter into the header tank through the inlet tube, when water level inductive probe in the header tank sensed the water level of settlement, full -automatic water pump can automatic be opened, took the rainwater in the header tank out outlet pipe, and spouted uniformly through square spray thrower and increase the rain test block. The utility model discloses can control increase and decrease amount of rainfall automaticallyaccurately to high -efficient ground rainfall simulation process and increase and decrease rain simulation experiment.
; 韩广轩
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