Crop irrigation water requirement calculation method on future climatic conditions

A technology for irrigation water demand and calculation methods, applied in calculation, climate change adaptation, climate sustainability, etc., can solve problems that cannot fully reflect the rice irrigation process

Active Publication Date: 2017-04-19
HOHAI UNIV
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Problems solved by technology

[0004] Therefore, the water balance calculation based on water demand, effective rainfall and average seepage cannot fully reflect the rice irrigation process

Method used

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  • Crop irrigation water requirement calculation method on future climatic conditions
  • Crop irrigation water requirement calculation method on future climatic conditions
  • Crop irrigation water requirement calculation method on future climatic conditions

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the technical solution of the present invention is described in further detail:

[0025] The invention provides a method for calculating water demand for crop irrigation under future climate conditions, such as figure 1 As shown, the specific method flow is as follows:

[0026] (1) Collect GCM climate model data and historical measured meteorological data from agricultural meteorological stations; among them, historical measured meteorological data include daily data of precipitation, temperature, radiation, wind speed and water pressure for no less than 30 years; The period data correspond exactly to the historical measured meteorological data.

[0027] (2) Based on the cumulative probability distribution of historical measured meteorological data and the cumulative probability distribution of GCM historical period data, bias correction processing is performed on future GCM data.

[0028] First, e...

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Abstract

The present invention discloses a crop irrigation water requirement calculation method on future climatic conditions. The method comprises the steps of collecting the future climatic mode data, and correcting the future climatic mode data based on the historical actually measured meteorological data to enable the future climatic mode data to be suitable for the climatic change influence evaluation of a region or station scale; according to the growth period data of a crop field test and an accumulated temperature formula, constructing a response model of the crop planting date and the crop growth period length to the temperature; utilizing a penman formula to combine a single crop coefficient method and a soil moisture stress coefficient to calculate the crop daily water requirement; based on a crop irrigation system and a water balance principle to calculate the crop daily irrigation water requirement. Aiming at the influence of the climatic change on the agricultural water resource security, the method of the present invention considers the change of the crop planting date and the growth period caused by the global warming, so that a water resource planning management department can forecast the regional future agricultural water resource utilization amount more accurately, and accordingly, a water resource planning scheme is proposed more reasonably.

Description

technical field [0001] The invention relates to a method for calculating water demand for crop irrigation under future climate conditions, belonging to the field of agricultural irrigation. Background technique [0002] Climate change, characterized by rising temperatures and fluctuating precipitation, has had a significant impact on water demand for agricultural irrigation. The water demand for crop irrigation is an important part of agricultural water use, and agricultural water use is one of the important links in the hydrological cycle. Climate changes such as temperature rise, abnormal precipitation, and frequent disasters directly affect the hydrological cycle process, which has a major impact on the pattern of agricultural water use. influences. Therefore, predicting the water demand for crop irrigation under future climate conditions is of great significance for ensuring agricultural production and saving water resources. At the same time, it provides theoretical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/06315G06Q50/02Y02A40/28Y02A90/10
Inventor 王卫光鲍金丽丁一民郑佳重邢万秋傅健宇董青
Owner HOHAI UNIV
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