Small size lysimeter suitable for different groundwater depths

Abstract

The invention discloses a small size lysimeter suitable for different groundwater depths. The small size lysimeter comprises a measuring inner barrel, a measuring outer barrel, a weighing sensor, a data acquisition unit, a sensor support device, a lithium battery, a water supplying meter, a water supplying pipe, a fixed bolt, a positioning bolt, a handle of a barrelhead, a sealed barrelhead, and a water level control barrel of groundwater. The small size lysimeter has the advantages that the weighing sensor replaces a traditional electronic balance scale, the continuous working of an apparatus is possible, the soil evaporation and the plant evaporation in any period can be automatically monitored, and the measurement accuracy is high; a tipping-bucket rain gauge purchased by a businesslike approach is taken as the water supplying meter, the cost is low, the water supplying meter and a water level control barrel of the groundwater are integrated as a whole, the evapotranspiration research on different groundwater depths is realized, the convenience is provided for the field operation and the construction cost is greatly lowered; the structure is simple, the measurement accuracy is effectively improved due to the fact that a fixed apparatus is used for continuously monitoring data, and the outside interference is avoided, meanwhile the usage and the maintenance are convenient, and can be completed by an ordinary worker.

Description

technical field [0001] The invention relates to a small automatic weighing lysimeter for measuring water consumption of soil evaporation and plant transpiration, which is especially suitable for long-term automatic observation under different buried depths of groundwater, and belongs to the field of hydrometeorological testing. Background technique [0002] Evapotranspiration refers to the sum of soil evaporation and vegetation transpiration, which controls the water vapor transported from the soil to the atmosphere and affects vegetation growth, soil water content, infiltration and runoff processes, etc. It plays an important role in the global water cycle and climate evolution. center link. Accurate monitoring of evapotranspiration is crucial for water resource management, basin planning, and sustainable development research in river basins. [0003] At present, the evapotranspiration of soil and plants is generally measured by lysimeter method, Bowen ratio method and edd...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a small lysimeter suitable for different groundwater burial depths, starting from reducing the experimental error of the instrument, improving the measurement accuracy and reducing manpower input, it aims to overcome the defects of the existing weighing lysimeter technology

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