A Calculation Method of Crop Irrigation Water Requirement under Future Climate Conditions

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

Active Publication Date: 2020-09-29
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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  • A Calculation Method of Crop Irrigation Water Requirement under Future Climate Conditions
  • A Calculation Method of Crop Irrigation Water Requirement under Future Climate Conditions
  • A Calculation Method of Crop Irrigation Water Requirement under Future Climate Conditions

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Embodiment Construction

[0024] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0025] The invention provides a method for calculating crop irrigation water requirements under future climatic 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 agrometeorological sites; among them, historical measured meteorological data include not less than 30 years of precipitation, temperature, radiation, wind speed, and water pressure daily data; GCM climate model data includes historical data The period data corresponds exactly to the historical measured weather data.

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

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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 crop irrigation water requirements under future climate conditions, and belongs to the field of agricultural irrigation. Background technique [0002] Climate change, characterized by temperature rise and precipitation fluctuations, has had a significant impact on agricultural irrigation water demand. Crop irrigation water demand is an important part of agricultural water, and agricultural water is one of the important links in the hydrological cycle. Climate changes such as rising temperatures, abnormal precipitation, and frequent disasters directly affect the hydrological cycle process, which has a major impact on the agricultural water use pattern. influences. Therefore, estimating the water demand for crop irrigation under future climatic conditions is of great significance for ensuring agricultural production and saving water resources. At the same time, it provides theoretical support for my country'...

Claims

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Application Information

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Patent Type & Authority Patents(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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