Device for researching soil erosion caused by rain dropping factors

Abstract

The invention discloses a device for researching soil erosion caused by rain dropping factors. The device comprises a lifting frame, a top arm, a rain tray, a rain dripping screen plate, a rotary discand a lysimeter; the top arm is transversely arranged on the lifting frame and can move up and down along the lifting frame to change the height to the ground; the rain tray is arranged below the toparm, a plurality of dripping nozzles are uniformly arranged at the bottom of the rain tray, the rain tray is connected with a water injection pipe, and a flow control valve is arranged on the water injection pipe; the detachable rain dripping screen plate is arranged below the rain tray; the rain dripping screen plate is formed by transversely and vertically crossed screen wires, spherical drainage protrusions are arranged at the crossed positions of the screen wires below the rain dripping screen plate, and the mesh number of the rain dripping screen plate is 8-35; the rotary disc comprisesa rotating base and a rotary column. According to the device, the research of rainfall raindrop kinetic energy on soil can be simulated in a manual mode, and the influence of different raindrop kinetic energy on soil striking can be researched by changing the raindrop kinetic energy; convenient conditions are provided for researching soil erosion caused by rain dropping factors, and the vacancy inthe field is filled up.

Description

technical field [0001] The invention relates to the field of research on the influence of raindrops on soil, in particular to a device for studying soil erosion caused by raindrops. Background technique [0002] Raindrop kinetic energy refers to the energy generated when a raindrop falls, which can be obtained according to the calculation formula of the size of the raindrop and its falling speed. [0003] Under the impact of raindrops (kinetic energy), the soil structure is destroyed; when raindrops fall on the soil surface, splash erosion and creep will occur and migrate down the slope, and the splash provides abundant loose particles for subsequent runoff transport Raindrop splashing promotes the occurrence of surface runoff in advance and increases the runoff volume; raindrops dissolve soluble nutrients, which will lead to the loss of soil fertility; raindrop splashing enhances the flocculation intensity of surface runoff in thin layers, resulting in increased rainfall er...

AI Technical Summary

Problems solved by technology

[0005] For the research on the impact of raindrop kinetic energy on soil, at present, only natural rainfall can be used for research. Natural rainfall has too many unstable factors, such as rainfall amount, rainfall duration, raindrop size, quality and other parameters, which are difficult to artificially remove. Control or quantification leads to too long a research investment cycle, but the data obtained is too single, and the research cost is high; secondly, due to seasonality, the research can only collect data in spring and summer, which limits the kinetic energy of raindrops. Processes that affect the soil

[0006] Moreover, to study the erosion of soil caused by raindrops, multiple experiments are needed to obtain more accurate research results; moreover, it is necessary to set up multiple groups of co

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