Indoor test system for sponge city vegetation buffer zone

The invention belongs to the technical field of test equipment, and relates to a sponge city vegetation buffer zone indoor test system, which comprises a test bed, a test tank, a water outlet, a diversion trench, a support net and a gradient adjustment module, the artificial rainfall module is arranged at the upper part of the test bed and is used for simulating rainfall so as to provide rainfall for the vegetation buffer zone on the upper surface of the supporting net; and the rainwater collection module is arranged on the side surface of the test bed, is close to the water outlet and the diversion trench, is connected with the water outlet and the diversion trench, and is used for collecting surface runoff and seepage water of the vegetation buffer zone and metering runoff and seepage flow. Through the arrangement of the supporting net, the artificial rainfall module and the rainwater collecting module, surface runoff and seepage water of the vegetation buffer zone can be collected, the runoff amount and th