Economical adjustable underground water level lysimeter

Abstract

The invention provides an economical adjustable underground water level lysimeter. The economical adjustable underground water level lysimeter is composed of a lysimeter box, an observation cylinder and an automatic water supply and discharge system, wherein the lysimeter box is composed of a box body, an inverted filter arranged on the bottom of the interior of the box body, and backfill, the observation cylinder is used for accommodating the automatic water supply and discharge system and communicated with the lysimeter box through a water supply and discharge pipeline, a discharged water receiving cylinder is arranged on the bottom of the interior of the observation cylinder, the automatic water supply and discharge system comprises an adjustable lifting and hoisting device, one or more Markov bottles marked with scales and connected in series and a water level balancing cup are arranged in the adjustable lifting and hoisting device side by side, three pipelines are arranged on the bottom of the water level balancing cup and are communicated with the lysimeter box, the one or more Markov bottles and an overflow pipe respectively, an upper opening of the overflow pipe is flush with a control water line, an upper port of the water level balancing cup is communicated with the atmosphere, and a lower port of the overflow pipe is communicated with the interior of the discharged water receiving cylinder. The economical adjustable underground water level lysimeter is simple in structure, convenient to install, low in manufacturing cost, wide in application range, reasonable in design and easy to operate, and data are accurate and reliable.

Description

technical field [0001] The invention relates to fields of hydrology and water resources, forestry, meteorology, ecology, etc., and is a lysimeter for measuring transpiration of crops, trees, grassland, etc., and soil phreatic evaporation. Background technique [0002] Lysimeters are divided into weighing lysimeters and non-weighing lysimeters. Weighing lysimeters include mechanical, hydraulic and electronic weighing. The traditional pit-type underground lysimeter is a non-weighing lysimeter, but like the weighing lysimeter, an underground observation room is generally required, which is destructive to the soil environment, has a complex structure, and is difficult to construct. , expensive, high operating costs, and inconvenient for popular use. Contents of the invention [0003] In order to solve the defects and deficiencies of the existing technology, the purpose of the present invention is to provide a simple structure, easy to use, low cost, wide application range, r...

AI Technical Summary

Problems solved by technology

The traditional pit-type underground lysimeter is a non-weighing lysimeter, but like the weighing lysimeter, an underground observation room is generally required, which is destructive to the soil environment, has a complex structure, and is difficult to construct. , expensive, high operating costs, inconvenient for popular use

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