Reference crop evapotranspiration calculation method based on remote sensing data

A technology of remote sensing data and calculation methods, which is applied in the fields of calculation, electrical digital data processing, and special data processing applications, etc., and can solve problems such as the difficulty in obtaining reference crop yields, and achieve the goal of reducing dependence, easy use, and strong operability Effect

Active Publication Date: 2018-03-30
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the regional reference crop evapotranspiration in areas with missing weather station data and areas

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  • Reference crop evapotranspiration calculation method based on remote sensing data
  • Reference crop evapotranspiration calculation method based on remote sensing data
  • Reference crop evapotranspiration calculation method based on remote sensing data

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Embodiment Construction

[0040] The present invention proposes a reference crop evapotranspiration calculation method based on remote sensing data, which will be further described in detail below in conjunction with specific embodiments.

[0041] A kind of reference crop evapotranspiration calculation method based on remote sensing data that the present invention proposes comprises the following steps:

[0042] 1) Establish a reference crop evaporation calculation model in the study area; the specific steps are as follows:

[0043] 1-1) Determine the research area, and select meteorological stations for obtaining training meteorological data in and around the area;

[0044] Research area can be any area among the present invention, and the selection requirement of meteorological station is that the position of meteorological station is in the research area scope, or has the area of ​​similar climate, geographical condition in the study area periphery (within 100 kilometers from the area boundary). Co...

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Abstract

The invention provides a reference crop evapotranspiration calculation method based on remote sensing data and belongs to the field of quantitative irrigation design and agricultural water resource management. The method comprises the steps that firstly, training weather data of a researching area is acquired, an output data set with corresponding training reference crop evapotranspiration ET0 asa training set is calculated, training remote sensing data of the researching area is acquired as an input data set of the training set, and a reference crop evapotranspiration calculation model of the researching area is established; then EY0 and remote sensing data are verified, and the precision of the model is verified; during use, the remote sensing data in a required time period is acquiredand input into the verified model, and the model outputs the reference crop evapotranspiration in the selected time period of the researching area. According to the reference crop evapotranspiration calculation method, by combining less weather station data with easily acquired remote sensing data, the method can be actually applied to area reference crop evapotranspiration calculation of an areawithout weather station data and an area with sparse weather stations and effectively assist in local irrigation planning and agricultural water management.

Description

technical field [0001] The invention belongs to the fields of quantitative irrigation design and agricultural water resources management, and in particular relates to a calculation method for reference crop evapotranspiration based on remote sensing data. Background technique [0002] Reference Crop Evaporation (ET 0 ) is an important part of the hydrological cycle and water resources management. Accurately estimate ET 0 It is of great significance for improving irrigation efficiency, drought monitoring, water resource reuse, and agricultural water resource scheduling. ET 0 is defined as the evapotranspiration of a hypothetical crop reference surface with specific characteristics, in agricultural applications, ET 0 It is often used to calculate crop evapotranspiration under actual conditions to guide irrigation design. Many studies have shown that a detailed and rational irrigation system can improve irrigation water use efficiency. Therefore, for the region ET 0 Prod...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/00G06F2111/10
Inventor 张子雄王忠静巩奕成尚文绣郑志磊徐国印蒋光昱刘晋龙索滢
Owner TSINGHUA UNIV
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