Multi-cylinder compensation type water surface evapotranspirometer and its use method

Abstract

The invention discloses a multi-cylinder compensation type water surface evaporating / exhaling instrument and using method thereof, belonging to the plant physiology, ecology monitoring and wetland meteorology hydrology measurement technology field. The instrument consists of a group of evaporating / exhaling monitoring cylinders, communicating pipes and a data central processing system; the monitoring cylinders are in same specification, each has different evaporating / exhaling bodies disposed therein, and the number of the monitoring cylinder can be added according to the real condition; the data central processing system consists of a data acquisition box, a bidirectional rotating motor, a photoelectric switch, a ultrasonic wave sensor and a water tank, to realize data timing automatic acquisition and wireless delivering function; the operation mode designed by the PLC program comprises: measuring multiple monitoring cylinder water levels by the ultrasonic wave sensor, controlling the instrument to acquiring and storing the data in certain time automatically. The beneficial effect of the invention is that: The evaporating / exhaling instrument can be used for monitoring evaporating / exhaling amount of emerged plants of multiple species in multiple states at the same time, and achieves the advantages of low cost, high precision, easy maintenance and convenient data delivering.

Description

technical field [0001] The invention belongs to the technical field of plant physiology, ecological monitoring and wetland meteorological and hydrological measurement, and relates to a multi-tube compensation water surface evapotranspiration instrument, in particular to the automatic observation and comparative study of emergent plant evapotranspiration and free water surface evaporation in wetland environment . Background technique [0002] Vegetation evapotranspiration and soil (water surface) evaporation play an extremely important role in the soil-plant-atmosphere system (SPAC). It is not only an important part of water balance and energy balance, but also closely related to the physiological activities of plants. Therefore, the study of evapotranspiration has always been an important topic of common concern in related disciplines such as agronomy, meteorology, hydrology, physical geography, and ecology. The research on evapotranspiration at home and abroad has a histor...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the current measurement method.

First of all, the current evapotranspiration research is mostly concentrated in the field of farmland crops, and the research technology of wetland evapotranspiration is quite scarce.

Secondly, most of the current research methods are to measure the total evapotranspiration of plants, and there is a lack of technical means for the separation and research of plant evapotranspiration and water surface evaporation.

In addition, most of the existing research methods cannot reflect the differences in evapotranspiration in different growth states of plants, so there are large errors in scale expansion.

[0005] In the wetland environment, there are various types of emergent plants and their distribution is complex, and the distribution of plants of different types or the same type in different states is wide, resulting in a large number of monitoring points that need to be deployed during the monitoring process and are very scattered.

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