Agricultural irrigation water demand prediction method

Abstract

The invention discloses an agricultural irrigation water demand prediction method, which comprises the following steps: selecting a reference period, and selecting crops of which the seeding area is greater than a set proportion as typical crops; calculating the irrigation water quota of the typical crops in the growth period according to the meteorological information; obtaining the ten-day rainfall of each meteorological station in the water-saving area, and calculating the effective rainfall of the typical crops based on the ten-day rainfall; calculating irrigation water demand of typical crops in unit area; judging whether the irrigation water demand per unit area of at least one typical crop is greater than the average value of the actual irrigation water demand per unit area of a continuous actual measurement year or not, and if so, correcting the irrigation water demand per unit area of all typical crops; otherwise, calculating the total water demand of the next year by adoptingthe irrigation water demand per unit area of each typical crop and the planting area of the next year. According to the scheme, the calculated irrigation water demand is corrected through the actualirrigation water consumption, so that the accuracy of irrigation water demand prediction can be improved, and the water-saving effect can be scientifically evaluated.

Description

technical field [0001] The invention relates to agricultural irrigation technology, in particular to a method for predicting agricultural irrigation water demand. Background technique [0002] Total water consumption control and quota management are important starting points for the full implementation of the policy of "water conservation priority". As a large water user, agriculture is not only related to the structure of agricultural planting, but also closely related to many factors such as climate, the promotion of water-saving technical measures, and the implementation of water-saving irrigation systems. The complicated factors make it difficult to reasonably determine the relevant factors. Agricultural water consumption is usually approved by the overall average of the historical planting structure and the irrigation quota level under the corresponding conditions. Without necessary verification, it is difficult to truly reflect the effectiveness of agricultural water-s...

AI Technical Summary

Problems solved by technology

As a large water user, agriculture is not only related to the structure of agricultural planting, but also closely related to many factors such as climate, the promotion of water-saving technical measures, and the implementation of water-saving irrigation systems. The complicated factors make it difficult to reasonably determine the relevant factors. Agricultural water consumption is usually approved by the overall average of the historical planting structure and the irrigation quota level under the corresponding conditions. Without necessary verification, it is difficult to truly reflect the effectiveness of agricultural water-saving measures, which leads to the current agricultural water consumption in most areas High water use benchmarks increase the cost of agricultural water use, make it difficult to save water in agricultural irrigation, and water resources cannot be used reasonably and efficiently, resulting in higher cost inputs for planting and lower agricultural output value

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