Hyporheic exchange sand tank model capable of adjusting water supply mode

Abstract

The invention discloses a hyporheic exchange sand tank model capable of adjusting the water supply mode. The characteristics lie in that the hyporheic exchange sand tank model comprises a sand tank main body, a constant water head device, a water pump and a water pipe connecting portion, and is characterized in that the sand tank main body is mainly composed of a main sand box located at the middle, an upstream water box and a downstream water box at two sides and a lower water box, the main sand box is internally loaded with sand for testing, and the main sand box is separated from the upstream water box, the downstream water box and the lower water box by organic glass plates with filtering holes; and the constant water head device comprises an upstream constant water head device and a downstream constant water head device. The advantages are that the hyporheic exchange sand tank model not only can realize constant-water-head water supply, but also can realize constant-flow water supply through the water pump; setting of the constant water head device enables a water head to become a quantifiable controllable factor; the design of the water pump enables the water flow to realize constant-flow circulation; different water supply modes meet different test requirements, the device is simple to operate, economic and affordable, has important significance for studying a hyporheic exchange mechanism and also provides a good idea for physical model building of a hyporheic zone.

Description

Technical field [0001] The invention relates to an undercurrent exchange sand tank model with an adjustable water supply mode, belonging to the technical field of surface water and groundwater exchange. Background technique [0002] In the water cycle, there is a close connection between surface water and groundwater, and the research on the interaction between surface water and groundwater has always been a hotspot in water cycle and water resources research. Undercurrent exchange refers to the exchange process between surface water and groundwater that occurs in the undercurrent zone, which has an important influence on the physical, chemical and biological processes in the river and undercurrent zone, such as algae growth, invertebrate composition and litter decomposition. The study of the physical mechanism of undercurrent exchange has important scientific significance for the study of the mechanism of surface water and groundwater solute migration and transformation, the stu...

AI Technical Summary

Problems solved by technology

In existing studies, the sand tank model for studying subsurface flow exchange often has a single water supply method, and the water flow can only be driven by adjusting the upstream and downstream constant head devices, or can only be driven by a water pump. A sand tank model combining the two has not yet been established.

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