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Determination method of electronic-weighing-type wet land evapotranspiration

A measurement method, evapotranspiration technology, applied in the direction of weighing by removing certain components, to achieve the effect of simple operation, cost saving and low cost

Inactive Publication Date: 2014-02-12
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the current method for measuring wetland vegetation evapotranspiration cannot have both low cost and high precision when adapting to harsh environments, and provides an electronic weighing method for measuring wetland evapotranspiration

Method used

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  • Determination method of electronic-weighing-type wet land evapotranspiration
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  • Determination method of electronic-weighing-type wet land evapotranspiration

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Experimental program
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Effect test

specific Embodiment approach 1

[0020] Specific embodiment 1: In this embodiment, an electronic weighing wetland evapotranspiration measurement method is performed according to the following steps:

[0021] 1. Preparation device: prepare the same two sets of electronic weighing wetland evapotranspiration measurement device. The electronic weighing wetland evapotranspiration measurement device is composed of a culture system and a weighing system; one of the electronic weighing wetland evapotranspiration measurement devices Water, vegetation, and soil are placed in the culture system of the device as a test device; the culture system in another electronic weighing wetland evapotranspiration measurement device is only placed in the same type of water and soil as the test device as a comparison device ;

[0022] 2. Calculate the amount of vegetation evapotranspiration: use the weighing systems of the two electronic weighing wetland evapotranspiration measurement devices described in step 1 to measure the total weigh...

specific Embodiment approach 2

[0031] Specific embodiment two: this embodiment is different from specific embodiment one in that: the cultivation system in step one is composed of an impermeable cylinder 1 made of ABS engineering plastic; the vegetation in step one is wetland vegetation; The weighing system described in 1 is composed of a weighing module 2, a junction box 3, and a weighing instrument 4. The signal output terminal of the weighing module 2 is connected to the signal input terminal of the weighing instrument 4 through connection 3. Others are the same as the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: this embodiment is different from specific embodiment two in that the wall thickness of the cylinder 1 described in step one is 2mm ~ 2.5mm, and the cross-sectional area inside the cylinder 1 is the soil coverage area in the culture system 0.3m 2 , The outer diameter of the cylinder 1 is 61.8cm, and the height of the cylinder 1 is 1m. Others are the same as the second embodiment.

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Abstract

The invention discloses a determination method of electronic-weighing-type wet land evapotranspiration, and relates to a determination method of wet land evapotranspiration, in order to solve the technical problems that an existing method for measuring the wet land vegetation evapotranspiration cannot guarantee high precision while achieving low cost and adaptability to a severe environment. The method comprises the following steps: 1. preparing a device: preparing two same electronic-weighing-type wet land evapotranspiration determination devices, and comparing, wherein one device serves as an experiment device contained with water, vegetation and soil, and the other device serves as a comparison device contained with water and soil with the same variety; and 2. calculating the vegetation evapotranspiration: weighing and detecting the experiment device and the comparison device, and calculating to obtain the evapotranspiration quantity of vegetation. The determination method is applied to the determination of wet land evapotranspiration.

Description

Technical field [0001] The invention relates to a method for measuring wetland evapotranspiration. Background technique [0002] In recent years, due to the impact of global climate change and human activities, wetlands have been degraded to varying degrees. Therefore, the establishment of water resources utilization efficiency evaluation methods for wetland ecosystems is particularly important. First, it is necessary to conduct a detailed investigation of the water cycle process of the wetland ecosystem, determine the wetland water cycle budget and water use structure, and analyze the current status and effective utilization of wetland water resources. Among them, evapotranspiration is one of the most important hydrological processes in the water cycle, the main channel of wetland water loss, and the key ecological process linking vegetation and water use. The vegetation evapotranspiration process in the wetland environment includes three parts: water surface evaporation, veget...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 闫丹丹栾兆擎王香红
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S