An Analysis Method of Water Requirement for Irrigation Levels of Farmland

Abstract

The invention provides a method for analyzing the water demand of farmland irrigation levels. The method comprises the following steps: analyzing the rigid water demand of farmland irrigation according to the theoretical water demand and effective precipitation in the growth period of crops; The elastic water demand for farmland irrigation is analyzed by coefficient; the luxury water demand for farmland irrigation is analyzed according to the actual utilization coefficient of irrigation water which is lower than the effective utilization coefficient of advanced farmland irrigation water recommended by the local area. According to the method for analyzing the water demand of farmland irrigation levels in the embodiment of the present invention, the problem of inaccurate calculation of the water demand for farmland irrigation is solved, and the water demand for farmland irrigation is analyzed and calculated in different levels, so that the water demand of each level of farmland irrigation can be accurately analyzed and calculated. , improve the efficiency of farmland irrigation water use, save water resources, point out the direction for the management and control of farmland irrigation water use, and provide a reliable basis for irrigation water management guidance and planning and allocation.

Description

Technical field [0001] The present invention relates to the field of water resources demand prediction, and more particularly to a method of analyzing water in farmland irrigation level. Background technique [0002] Agricultural water is an important part of my country's current water, among which farmland irrigation water saves most of them. At present, my country's farmland irrigation methods are relatively extensive than developed countries. The phenomenon of high water is farm irrigation. In addition, for some canal irrigation, farmland irrigation water effective utilization factors are relatively small, distance developed countries 0.7- 0.8 Farmland irrigation water effective utilization coefficient has a large gap, has a waste of water resources, and the effective utilization efficiency of water resources is low. [0003] The study believes that water is a hierarchy, which can be three levels of irrigation water demand, elastic demand, and luxury demand. Rigid demand refer...

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Problems solved by technology

[0004] At present, my country still adopts the quota method to calculate and predict irrigation water demand. This method only considers irrigation water demand as a whole and does not conduct effective and reasonable analysis of crop water demand. The results are inaccurate and the deviation is large, which is not conducive to the regulation of irrigation water demand, it is difficult to save irrigation water resources and improve the effective use efficiency of irrigation water, and it cannot provide a reliable basis for irrigation water allocation planning and management guidance. Therefore, farmland The analysis and calculation method of irrigation water demand has become a problem to be studied

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