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Response analysis method of irrigation water demand to changing environment based on crop water demand mechanism

A crop water demand and response analysis technology, applied in the field of agricultural irrigation, can solve the problems of not calculating irrigation quotas, etc., and achieve the effect of alleviating the contradiction between water supply and demand, ensuring effective irrigation, and ensuring food security

Active Publication Date: 2019-03-08
HOHAI UNIV
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Problems solved by technology

The problem with these studies is that first, they failed to combine the changes in crop phenology and growth periods under climate change to study the comprehensive impact of climate change on the total water demand and the process of water demand; Multiply the irrigation quota by the crop growth area, there is no change in irrigation quota that can be calculated from the perspective of water demand mechanism

Method used

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  • Response analysis method of irrigation water demand to changing environment based on crop water demand mechanism
  • Response analysis method of irrigation water demand to changing environment based on crop water demand mechanism
  • Response analysis method of irrigation water demand to changing environment based on crop water demand mechanism

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] This technology is applied in the Ningxia Yellow River Diversion Irrigation Area, including the Ningxia Yellow River Diversion Irrigation Area and Inner Mongolia Yellow River Diversion Irrigation Area, which is located in the Xiaheyan-Toudaoguai section of the upper reaches of the Yellow River. It has a continental climate, less rain, strong wind and sand, strong evaporation, dry climate, and good sunshine conditions. It is an important grain production base and a large source of irrigation water in the upper reaches of the Yellow River.

[0047] Such as figure 1 Shown, a kind of irrigation water demand based on crop water demand mechanism is to the response analysis method of changing environment, comprises the steps:

[0048] (1) Establish a physical geography data set in the study area, select typical meteorological stations in the Ningmeng Yellow River Dive...

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Abstract

The invention discloses a response analysis method of irrigation water demand to changing environment based on a crop water demand mechanism. Based on the daily irrigation water demand of each crop and planting structure of the research area, the irrigation water demand and irrigation time rhythm of the research area are obtained. The change of temperature is used to reflect the change of naturalenvironment, and the change of planting structure is used to reflect the change of social environment. Two meanings of irrigation water demand and irrigation time rhythm change are to analyze the response of irrigation water demand and irrigation time rhythm to temperature change and cropping structure change in the study area. From the viewpoint of the crop water demand mechanism, the method of the invention systematically identifies the response law of the irrigation water demand and the irrigation time rhythm of the research area under the changing environment, and has the advantages of rationality and operability, provides scientific reference for farmers to plant seeds, to ensure effective irrigation, thereby ensuring food security. At the same time, the method provides the theoretical support for future research on how to adjust planting structure to adapt to climate change and alleviate the contradiction between supply and demand of water resources in the study area.

Description

technical field [0001] The invention relates to a response analysis method of irrigation water demand to changing environment based on crop water demand mechanism, and belongs to the technical field of agricultural irrigation. Background technique [0002] At present, the impact of climate change on water resources and the adaptation countermeasures are global issues of international concern, and they are also major strategic issues facing China's sustainable development. Agricultural production is the most sensitive to the impact of climate change, because as the decisive climatic factors for crop growth, changes in heat, sunshine, radiation, precipitation, etc. will directly affect the growth of crops. Temperature is a necessary condition for crop growth, and the heat it represents determines the different stages of the phenological phase of the crop and the start time and length of the entire growth period. With the progress of climate change, sudden, trendy, and periodi...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/06315G06Q50/02
Inventor 董增川蒋飞卿徐伟卞佳琪吴晗
Owner HOHAI UNIV
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