In-situ soil evaporation amount measurement apparatus

Abstract

The present invention relates to an in-situ soil evaporation amount measurement apparatus, which comprises a collector and a weighing system, wherein a water storage box and a wet soil column are placed on the weighing disk of the weighing system, the water storage box and the wet soil column are adjacently placed, a cavity is arranged inside the water storage box, the water storage box is provided with a water injection hole, the water injection hole is communicated with the internal of the water storage box, the one water storage box side adjacent to the wet soil column is provided with a communication hole, the communication hole is communicated with the internal of the water storage box, the wiring column of the collector is connected with the weighing system, and the collector is connected to the wet soil column and soil to be measured through a temperature sensor arranged on the conducting wire terminal end. According to the present invention, the in-situ soil evaporation amount measurement apparatus has characteristics of high measurement accuracy, easy operation, low soil damage and continuous multi-point positioning or movable measurement; and with the apparatus, the problems that the existing apparatus can not reflect the soil evaporation space variability and the difference of the measurement results of the evaporators with different sizes is high can be solved.

Description

technical field [0001] The invention relates to an in-situ soil evaporation measurement device. Background technique [0002] Soil evaporation is the water in the soil that enters the atmosphere through evaporation from the soil surface, and is an important part of the water cycle in terrestrial ecosystems. In the farmland ecosystem, soil evaporation generally accounts for 20-30% of the total evapotranspiration during the crop growth period, which is generally related to factors such as soil type, crop type and growth stage, soil moisture content and meteorological conditions. Important basic parameters for management and regional water resource allocation. The current soil evaporation measurement device generally uses a small evaporator to measure. This method is a direct measurement method, that is, it takes the original soil and puts it into a small container for measurement. The advantage is that it can directly measure soil evaporation. The disadvantage is that the soi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an in-situ soil evaporation measurement device to solve the problem that the spatial variability of soil evapotranspiration cannot be reflected, and different sizes of evaporators have large differences in measurement results.

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