Recently, the Minister of Water Resources, the Jiangshuili Commission-Changjiang Academy of Sciences, cooperated with the Point Group to introduce a surface evapotranspiration observation system. The Group successfully installed and commissioned the system and successfully passed the acceptance.
The lysimeter is an important tool for studying water balance in agriculture, forestry and other environmental sciences. It is characterized by the ability to quantify the actual evapotranspiration of bare land and the actual evapotranspiration of land covered with vegetation. The weighing lysimeter can continuously monitor the weight of the soil column to obtain detailed information on the change of water content in the soil column in any time period. The amount of evapotranspiration can be determined by combining rainfall and related measurement data. Therefore, the lysimeter can be used to simulate the natural relationship between soil-atmosphere-plants and to reflect the relationship between laboratory studies and field experiments.
The core configuration of the surface evaporation observation system includes four aspects: mobile plant fluorescence imaging system (Czech PSI), surface runoff measurement system and soil moisture characteristic curve measurement system (UGT, Germany), real-time dynamic ecological network wireless monitoring system (USA) CAMPBELL), Imaging Spectrometer (TETRACAM, USA).
The UGT sensor used in this system is a special ceramic that can realize point measurement and accurate zero tension measurement. The sensor responds quickly. High resolution analog voltage output signal and continuous monitoring. The CAMPBELL data collector in the system is sensitive and accurate, and the sampling frequency can reach 100HZ. If a set of data is collected for half an hour, at least 3 years of data can be stored, and the collector can realize remote wireless transmission of data. . The collected data can be directly converted into EXCEL forms for processing, which is convenient for customers to process data.
Founded in 1951, the Yangtze River Scientific Research Institute (hereinafter referred to as the Changke Academy) is a national non-profit scientific research institution under the jurisdiction of the Minister of Water Resources. The Academy of Sciences provides scientific and technological support for the national water conservancy project, the governance, development and protection of the Yangtze River Basin. At the same time, it is oriented to the national economy construction related industries, providing water resources and hydropower research, providing technical services and developing scientific and technological products.
As the official agent of UGT transpiration series products in China, the Group has been committed to providing comprehensive, timely and perfect system solutions and technical services for scientific research units in the domestic ecological field.
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