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Optimized design method of regional crop evapotranspiration spatial-temporal pattern

A crop and water consumption technology, applied in computing, special data processing applications, instruments, etc., can solve the problems of less research on regional crop water consumption spatio-temporal optimization

Active Publication Date: 2013-01-16
CHINA AGRI UNIV
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Problems solved by technology

[0003] Crop water consumption is affected by factors such as meteorology, terrain, soil, and crop spatial distribution. Scholars at home and abroad have used different methods to study it, but most of them focus on the water consumption of single-point and single-type crops. Regional crops There are few researches on spatio-temporal optimization of water consumption and related aspects

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  • Optimized design method of regional crop evapotranspiration spatial-temporal pattern
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Embodiment Construction

[0033] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0034] figure 1 It is a flow chart of the optimal design method for the spatio-temporal pattern of regional crop water consumption. Such as figure 1 Shown, the method provided by the invention comprises:

[0035] Step 1: Select the optimization area and obtain the water consumption calculation unit, and select the water consumption impact factor on the water consumption calculation unit.

[0036] Select the optimized area and call the digital elevation model (Digital elevation model, DEM), crop spatial distribution map, climate data, soil distribution map and crop water consumption data of the optimized area. From the DEM data in the system, micro-topographic factor data such as slope, aspect, and slope length are ...

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Abstract

The invention discloses an optimized design method of a regional crop evapotranspiration spatial-temporal pattern in the technical field of crop planting optimization control. The method comprises the following steps of: selecting an optimization region, acquiring an evapotranspiration calculation unit, and selecting evapotranspiration impact factors on the evapotranspiration calculation unit; calculating an evapotranspiration comprehensive impact factor, selecting crops of set types, and establishing a single-crop distributed evapotranspiration model; partitioning the optimization region; calculating a crop evapotranspiration comprehensive impact factor interval; coupling partitions and the evapotranspiration comprehensive impact factor interval, and thus obtaining different crop production dominant regions; and establishing a regional crop evapotranspiration spatial-temporal pattern optimization model, calculating an optimal annual plant area interval of each type of crops in each partition, distributing in the crop production dominant regions, and thus obtaining the regional crop evapotranspiration spatial-temporal pattern. By adoption of the method, maximum moisture output benefits of regional crop evapotranspiration can be distributed, and the aim of optimizing the regional crop evapotranspiration spatial-temporal pattern is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of crop planting optimization control, and in particular relates to an optimal design method for regional crop water consumption spatio-temporal pattern. Background technique [0002] With the development of society and economy, the contradictions of population increase, land decrease, and water shortage are becoming more and more prominent in our country. The situation that agriculture is restricted by water will exist for a long time. The average annual drought-affected area is 544 million mu, accounting for about 30% of the cultivated land area. Water shortage in irrigation areas About 30 billion cubic meters, tens of billions of kilograms of grain have been reduced due to drought, and water shortage has had a negative impact on agriculture, threatening food security. The planting industry is a large agricultural water consumer, and irrigation water accounts for about 90% of the total agricultural water c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王素芬黄好思康绍忠佟玲郝新梅
Owner CHINA AGRI UNIV
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