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A method for obtaining the proportion of the influence of the reuse and the spatial variation of the return water on the net inflow water productivity

A productivity and return water technology, applied in the field of obtaining the proportion of return water reuse and spatial variation affecting the net inflow water productivity, which can solve the problem of not reducing irrigation water and other issues

Active Publication Date: 2018-12-14
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

For example, in farmlands where the impact of return water reuse on net inflow water productivity is relatively high, water resources flow from small-scale farmlands to large-scale farmlands and are used, and there is less waste. There is no reduction in irrigation water in small-scale farmlands. necessary

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  • A method for obtaining the proportion of the influence of the reuse and the spatial variation of the return water on the net inflow water productivity
  • A method for obtaining the proportion of the influence of the reuse and the spatial variation of the return water on the net inflow water productivity

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Embodiment Construction

[0078] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art. In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0079] The embodiment of the present invention provides a method for obtaining the proportion of the impact of regressive water reuse and spatial variation on net inflow moisture productivity, see the attached figure 1 , the method includes:

[0080] Step 101, the terminal obtains the outflow of large-scale farmland and the crop evacuation of large-scale farmland; large-scale farmland includes small-scale farmland;

[0081] Among them, the terminal obtains the outflow of large-scale farmland, including:

[0082] Obtain the surface drainage of large-scale farmland, th...

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Abstract

The invention discloses a method for obtaining the proportion of the influence of the reuse and the spatial variation of the return water on the net inflow water productivity, belonging to the irrigation field. The method comprises: obtaining the outflow of large ands small-scale farmland and crop evapotranspiration of large and small-scale farmland, and then obtaining the net inflow water productivity of large-scale farmland, and the net inflow water productivity, and the reuse water quantity and area ratio of small-scale farmland, and then obtaining the net inflow water productivity of large-scale farmland when only reuse of return water is considered, and obtaining the influence proportion of reuse of return water on net inflow water productivity. The present invention effectively guides irrigation, improves the net inflow water productivity and reduces the waste of water resources by obtaining the proportion of the influence of the reuse and the spatial variation of the return water on the net inflow water productivity respectively.

Description

technical field [0001] The invention relates to the field of irrigation, in particular to a method for obtaining the proportion of return water reuse and spatial variation on net inflow water productivity. Background technique [0002] Water productivity refers to the yield or output value obtained per unit of water resources under certain crop varieties and cultivation conditions, and the unit is kg / m 3 or Yuan / m 3 . Net inflow water productivity is a kind of water productivity, which reflects all the water entering the farmland boundary (including precipitation, irrigation, surface water inflow and groundwater inflow, etc.) change, groundwater storage change, soil water storage change, total water storage increase is positive, and decrease is negative) input-output efficiency is a comprehensive index to measure the level of agricultural production and the scientificity and rationality of agricultural water use. One of the important indicators of irrigation and efficient...

Claims

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Application Information

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IPC IPC(8): G06F17/18G06Q50/02
CPCG06F17/18G06Q50/02
Inventor 陈皓锐伍靖伟王少丽管孝艳陶园刘静戴玮徐楠楠
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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