CN113516392B - Virtual water flow resource effect and synergy evaluation method, system and storage medium - Google Patents
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Abstract
A virtual water flow resource effect and synergy evaluation method, system and storage medium, the evaluation method comprises: acquiring production water footprints of various crops and crop circulation trade data of a measuring area in a measuring period; calculating and calculating the production water footprint of each crop unit in the annual region and the virtual water flow of each crop; calculating the production water footprint standard of each crop in the climate zone to which the measuring and calculating area belongs; calculating the water footprint standard of each crop production of each province in the measuring and calculating area, and evaluating the high efficiency of the crop production of each province; evaluating the uncontrollable virtual blue water flow quantity of each crop according to the grid scale blue water shortage index of the measuring and calculating area; calculating indirect water saving quantity generated by trade circulation according to the production water footprint and corresponding trade quantity of each crop import and export area; and evaluating the synergy of the production efficiency and the sustainability of each crop in each measuring and calculating area according to the grid scale blue water shortage index and the water footprint standard of the measuring and calculating area. The invention can accurately provide the crop production water footprint reference target for actual production.
Description
Technical Field
The invention belongs to the field of water resource utilization, and particularly relates to a virtual water flow resource effect and synergy evaluation method, a system and a storage medium, which are used for measuring and calculating consumption of different types of water resources by regional crop production, evaluating the efficiency, sustainability and indirect water saving quantity generated by trade of production water and providing targets of crop production water footprint references for all actual production.
Background
The method evaluates the high efficiency and sustainability of the crop production water, can evaluate the high efficiency and sustainability of the virtual water flow of the crop production and the indirect water saving quantity generated by trade circulation, realizes the overall consideration of the physical water and the virtual water, is an entry point of a physical water-virtual water 'binary three-dimensional' coupling flow theoretical frame, and has guiding significance for defining the water utilization efficiency of the physical water and adjusting the virtual water flow pattern of grains. Both crop production water footprints and virtual water flows have scale effects.
The existing virtual water flow high efficiency, sustainability and indirect water saving quantity evaluation stays in the preliminary exploration of the national scale, and the national scale below, namely the regional scale, is not concerned yet; the current preparation of the crop production water footprint standard is limited to the global average level in 1996-2005, and no attention is paid to the preparation method of the crop production water footprint standard in areas under different climatic conditions (such as arid areas and wet areas); meanwhile, the synergy evaluation of the water resource high efficiency and the sustainability is not concerned yet.
Disclosure of Invention
Aiming at the limitation of the evaluation scale of the virtual water flow associated effect of crop production and the blank of the standard preparation of the water footprint of crop production in different climatic regions in the prior art, the invention provides a virtual water flow resource effect and synergy evaluation method, a system and a storage medium, which can comprehensively and accurately provide references for realizing efficient and sustainable utilization of agricultural water resources.
In order to achieve the above purpose, the present invention has the following technical scheme:
a virtual water flow resource effect and synergy evaluation method comprises the following steps:
acquiring production water footprints of various crops and crop circulation trade data of a measuring area in a measuring period;
calculating and calculating the production water footprint WF (i, p) of each crop unit in the annual region;
calculating and calculating the virtual water flow VW (i, j, p) of each crop in the annual region;
defining a climate zone to which the measuring and calculating zone belongs, and calculating the production water footprint benchmark of each crop in the climate zone to which the measuring and calculating zone belongs;
calculating the water footprint standard of each crop production in each province in the measuring and calculating area, and comparing the water footprint standard of each crop production in the climate area to which the province belongs, so as to evaluate the high efficiency of the crop production in the province;
according to the measurement and calculation region grid scale blue water shortage index BWS, evaluating the uncontrollable virtual blue water flow quantity of each crop;
calculating indirect water saving quantity generated by trade circulation according to the production water footprint and corresponding trade quantity of each crop import and export area;
and evaluating the synergy of the production efficiency and the sustainability of each crop in each measuring and calculating area according to the grid scale blue water shortage index BWS and the water footprint standard of the measuring and calculating area.
As a preferred solution of the present invention, the obtaining the production water footprints of each crop and the crop circulation trade data in the measuring and calculating area in the measuring and calculating period includes: obtaining the blue water footprint m of the crop production of the calculation space unit 3 A, green water footprint m 3 Crop yield ton/hm 2 Measuring and calculating import and export data of each crop in the area according to the annual total yield ton/a of each crop; acquiring an drought index AI in a measuring and calculating area; and obtaining a blue water shortage index BWS in the measuring and calculating area.
As a preferred embodiment of the present invention, the expression for calculating the water footprint WF (i, p) of each crop unit in the annual region is as follows:
in the above formula: WF (i, p) is the unit production water footprint of the i province crop p, the unit is m 3 /ton；WF total (i, p) is the total water footprint of the i province crop p in m 3 A; y is the yield of the i province crop p in ton/a.
As a preferred embodiment of the present invention, the expression for calculating the virtual water flow VW (i, j, p) of each crop in the annual region is as follows:
VW(i，j，p)＝T(i，j，p)×WF(i，p)
in the above formula: VW (i, j, p) is the virtual water flow of crop p from i province to j province, in m 3 A; t (i, j, p) is the trade traffic of crop p from i province to j province in ton/a.
As a preferred scheme of the present invention, the expression for calculating the crop non-sustainable virtual blue water flow amount is as follows:
BVW unsus (i，p)＝BVW(i，p)×σ
in the above formula: BVW (BVW) unsus (i, p) is the non-sustainable virtual blue water flow of the i province crop p, the unit is m 3 A; BVW (i, p) is the total virtual blue water flow of the i province crop p, and the unit is m 3 A; sigma is the proportion of the total blue water footprint to the non-sustainable blue water footprint consumed by the i-province production crop p.
As a preferred embodiment of the present invention, the expression for calculating the indirect water saving amount generated by trade circulation is as follows:
ΔS(i，j，p)＝T(i，j，p)×(WF(i，p)-WF(j，p))
in the above formula: ΔS (i, j, p) is the indirect water saving amount produced by the trade circulation of crops p from i province to j province, and the unit is m 3 A; WF (j, p) is the unit production water footprint of j-province crops p, and the unit is m 3 /ton。
As a preferred scheme of the invention, the synergy degree of the production efficiency and the sustainability of each crop in each measuring and calculating area is evaluated according to the following expression:
in the above formula: SI is a synergistic evaluation index of the production efficiency and sustainability of crops p in i province, WS i，b A "benchmark" for i province blue water shortage index; WS (WS) i Blue water shortage value is i; WS (WS) max ，WS min Respectively refers to the maximum value and the minimum value of the blue water-saving shortage value; WF (WF) i，b For the production water footprint standard of the crop p in the province of i, the unit is m 3 /ton；WF i Producing a water footprint for the i province crop p in m 3 /ton；WF max ，WF min Respectively refers to the maximum value and the minimum value of the production water footprint of the crop p in the province, and the unit is m 3 /ton。
The invention also provides a virtual water flow resource effect and synergy evaluation system, which comprises:
the production water footprint and circulation trade data acquisition module is used for acquiring the production water footprints of all crops and the circulation trade data of the crops in the measuring and calculating area in the measuring and calculating period;
the unit production water footprint calculation module is used for calculating the production water footprints of all crop units in the annual region;
the virtual water flow quantity calculation module is used for calculating and measuring the virtual water flow quantity of each crop in the annual region;
the production water footprint reference calculation module of the climatic zone is used for defining the climatic zone of the measuring and calculating zone and calculating the production water footprint reference of each crop in the climatic zone;
the province production high efficiency evaluation module is used for calculating the production water footprint standard of each province of each crop in the measuring and calculating area and comparing the province with the production water footprint standard of each crop in the climate area to which the province belongs so as to evaluate the high efficiency of the province production of the crops;
the non-sustainable virtual blue water flow rate evaluation module is used for evaluating the non-sustainable virtual blue water flow rate of each crop according to the grid scale blue water shortage index BWS of the measuring area;
the trade circulation indirect water quantity calculating module is used for calculating the indirect water saving quantity generated by the trade circulation according to the production water footprints and the corresponding trade quantities of the import and export areas of the crops;
and the production efficiency and sustainability synergy evaluation module is used for evaluating the synergy of the production efficiency and sustainability of each crop in each measuring and calculating area according to the grid scale blue water shortage index BWS and the water footprint standard of the measuring and calculating area.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the virtual water flow resource effect and the synergy evaluation method when being executed by a processor.
Compared with the prior art, the invention has the following beneficial effects: comparing the water footprint of each crop in each province in the combination area with the corresponding water footprint standard of each crop, and measuring and calculating the high-efficiency virtual water flow of each crop in each province; calculating the sustainable virtual blue water flow of each crop in each province by combining with the blue water shortage index; according to the production water footprints and corresponding trade amounts of the crop import and export regions, measuring and calculating indirect water saving amounts generated by trade circulation among the regions; and evaluating the synergism of the high efficiency and the sustainability according to the high efficiency and the sustainability of the crop production in the production area. The evaluation method provided by the invention introduces a judging method of the virtual water flow efficiency of regional crop production, an evaluation method of the non-sustainable virtual blue water flow quantity, an indirect water saving algorithm and the synergy degree of the efficiency and the sustainability, and provides a setting method of the crop production water footprint benchmark of different climatic regions, so that the target of crop production water footprint reference is accurately provided for all actual production, the determination of whether the crop production entity water utilization is efficient or not and whether the virtual water flow pattern is reasonable or not in the measuring and calculating region is facilitated, and the reference is provided for realizing the efficient and sustainable utilization of agricultural water resources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for evaluating the effect and the synergy of virtual water flow resources.
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the following examples and the accompanying drawings, and it is apparent that the described examples are some, but not all, examples of the present invention.
Based on the embodiments of the present invention, a person skilled in the art can make several simple modifications and adaptations without making any inventive effort, and all other embodiments obtained are within the scope of protection of the present invention.
Referring to fig. 1, the virtual water flow resource effect and synergy evaluation method of the invention comprises the following steps:
s100, acquiring crop production water footprint and crop circulation trade data of a measuring and calculating area in a measuring and calculating period, wherein the crop production water footprint comprises grid-scale crop production blue water footprint (m) 3 /a), green water footprint (m 3 /a), crop yield (ton/hm) 2 ) Annual total yield (ton/a) of each crop and import and export data of each crop in each province in the area; acquiring an in-region drought index AI; acquiring a blue water shortage index (BWS) in the region;
s200, calculating the production water footprints of each crop unit in the annual region. The blue water footprint and the green water footprint of the annual crop unit production are calculated by dividing the total blue water footprint and the total green water footprint of the annual crop by the total annual yield respectively:
in the formula (1): BWF (i, p) and GWF (i, p) are respectively blue water footprint and green water footprint produced by the unit of i province crop p, and the unit is m 3 /ton；WF blue (i，p)、WF green (i, p) are the total blue water footprint and the total green water footprint of the i province crop p respectively, and the unit is m 3 A; y is the yield of the i province crop p, and the unit is ton/a;
s300, calculating and measuring the virtual water flow of each crop in the annual region.
The virtual blue water flow and the virtual green water flow of the crops are obtained by multiplying the blue water footprint and the green water footprint of units required by the crop outlet area to produce the crops by the trade amount of the units and other areas:
in the formula (2): BVW (i, j, p) and GVW (i, j, p) are the virtual blue water flow and the virtual green water flow of the crops p from i province to j province respectively, and the unit is m 3 A; t (i, j, p) is the trade traffic of crop p from i province to j province in ton/a;
s400, calculating the production water footprint standard of crops in different climatic regions. Dividing a measuring and calculating area into an arid area (AI < 0.5) and a wetting area (AI > 0.5) according to an arid index AI, sequencing the grid scale crop production water footprints of the arid area and the wetting area from low to high respectively, and recording the grid crop production water footprints as current year water footprint references of the crops when the corresponding accumulated crop yield of a certain grid reaches 25% (or 10% or 20%) of the current year of the crops, thereby obtaining the crop production water footprint references of different climate areas;
s500, evaluating the virtual water flow efficiency of the crop production in the measuring and calculating area. Sequencing the water footprint of each crop in each province in the area from low to high, when the accumulated output of a certain grid corresponds to 50% of the annual output of the crop in each province, and when the water footprint of the crop corresponding to the grid is lower than the water footprint reference of the crop in the climate area to which the province belongs, considering that the crop in each province is produced efficiently, otherwise, the crop in each province is not produced efficiently, and further judging that the virtual water flow of the crop in each province is efficient or inefficient;
s600, according to a measurement area grid scale blue water shortage index (BWS), when BWS is less than 1, blue water in the area is considered to be sustainable; when 1.ltoreq.BWS.ltoreq.2, the regional blue water is considered to be moderately short; when BWS > 2, the blue water extremely shortage in the region is considered, and the blue water footprint (m 3 A) accounts for the total blue water footprint (m) 3 Ratio of a) from which the non-sustainable virtual blue water flow of each crop is obtained:
BVW unsus (i，p)＝BVW(i，p)×σ (3)
in the formula (3): BVW (BVW) unsus (i, p) is the non-sustainable virtual blue water flow of the i province crop p, the unit is m 3 A; BVW (i, p) is the total virtual blue water flow of the i province crop p, and the unit is m 3 A; sigma is the proportion of the sustainable blue water footprint consumed by the i-province production crop p to the total blue water footprint;
s700, calculating indirect water saving quantity (delta S (i, j, p)) generated by the trade circulation of crops according to the production water footprint of the crop import and export regions and the corresponding trade circulation of the crops, wherein when delta S (i, j, p) is less than 0, the trade circulation is considered to have water saving benefits; when Δs (i, j, p) =0, the trade circulation is considered to have no water saving benefit; when Δs (i, j, p) > 0, this trade circulation is considered to produce a waste of water resources:
AS(i，j，p)＝T(i，j，p)×(WF(i，p)-WF(j，p)) (4)
in the formula (4): ΔS (i, j, p) is the indirect water saving amount produced by the trade circulation of crops p from i province to j province, and the unit is m 3 A; WF (j, p) is the unit production water footprint of j-province crops p, and the unit is m 3 /ton；
S800, evaluating the Synergism (SI) of the production efficiency and the sustainability of each crop in each region according to a grid scale blue water shortage index (BWS) of a measuring region and a water footprint standard;
when-2 < SI < 0, the crop production is not sustainable and inefficient in this region; when 0 < SI < 2, the crop production in the area is sustainable and efficient; when si=0, ifIf positive, the production is continuous but inefficient, if +.>If positive, production is not sustainable but efficient. Wherein WS i，b Blue water shortage value of grid corresponding to water footprint reference:
in formula (5): SI is a synergistic evaluation index of the production efficiency and sustainability of crops p in i province, WS i，b A "benchmark" for i province blue water shortage index; WS (WS) i Blue water shortage value (grid average value) for i; WS (WS) max ，WS min Respectively refers to the maximum value and the minimum value of the blue water shortage value of the grid scale of i province; WF (WF) i，b For the production water footprint standard of the crop p in the province of i, the unit is m 3 /ton；WF i Producing a water footprint for the i province crop p in m 3 /ton；WF max ，WF min Respectively refers to the maximum value and the minimum value of the production water footprint of the crop p with the grid scale of i province, and the unit is m 3 /ton。
The invention also provides a virtual water flow resource effect and synergy evaluation system, which comprises:
the production water footprint and circulation trade data acquisition module is used for acquiring the production water footprints of all crops and the circulation trade data of the crops in the measuring and calculating area in the measuring and calculating period;
the unit production water footprint calculation module is used for calculating the production water footprints of all crop units in the annual region;
the virtual water flow quantity calculation module is used for calculating and measuring the virtual water flow quantity of each crop in the annual region;
the production water footprint reference calculation module of the climatic zone is used for defining the climatic zone of the measuring and calculating zone and calculating the production water footprint reference of each crop in the climatic zone;
the province production high efficiency evaluation module is used for calculating the production water footprint standard of each province of each crop in the measuring and calculating area and comparing the province with the production water footprint standard of each crop in the climate area to which the province belongs so as to evaluate the high efficiency of the province production of the crops;
the non-sustainable virtual blue water flow rate evaluation module is used for evaluating the non-sustainable virtual blue water flow rate of each crop according to the grid scale blue water shortage index BWS of the measuring area;
the trade circulation indirect water quantity calculating module is used for calculating the indirect water saving quantity generated by the trade circulation according to the production water footprints and the corresponding trade quantities of the import and export areas of the crops;
and the production efficiency and sustainability synergy evaluation module is used for evaluating the synergy of the production efficiency and sustainability of each crop in each measuring and calculating area according to the grid scale blue water shortage index BWS and the water footprint standard of the measuring and calculating area.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the virtual water flow resource effect and the synergy evaluation method when being executed by a processor.
The computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to perform the virtual water flow resource effect and synergy evaluation method of the present invention.
The crop production virtual water flow resource effect and synergy evaluation method provided by the invention is characterized in that a regional crop production virtual water flow high-efficiency judgment method, an unsustainable virtual blue water flow quantity, an indirect water saving algorithm and a high-efficiency and sustainable synergy evaluation method are introduced, and crop production water footprint benchmark setting methods in different climatic regions are provided for providing targets of crop production water footprint references for all actual production, so that the calculation of whether the crop production entity water utilization is high or not and whether the virtual water flow pattern is reasonable or not is facilitated, and references are further provided for realizing the high-efficiency and sustainable utilization of agricultural water resources.
The invention has been described above in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations thereof can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are merely exemplary illustrations of the present invention as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention, and it is intended to cover in the appended claims the scope of the invention as defined by the equivalents thereof.
Claims (4)
1. The virtual water flow resource effect and synergy evaluation method is characterized by comprising the following steps of:
acquiring production water footprints of various crops and crop circulation trade data of a measuring area in a measuring period;
calculating and calculating the production water footprint WF (i, p) of each crop unit in the annual region;
the expression of the water footprint WF (i, p) produced by each crop unit in the calculated annual region is as follows:
in the above formula: WF (i, p) is the unit production water footprint of the i province crop p, the unit is m 3 /ton；WF total (i, p) is the total water footprint of the i province crop p in m 3 A; y is the yield of the i province crop p, and the unit is ton/a;
calculating and calculating the virtual water flow VW (i, j, p) of each crop in the annual region;
the expression of the virtual water flow VW (i, j, p) of each crop in the calculation and calculation annual region is as follows:
VW(i，j，p)＝T(i，j，p)×WF(i，p)
in the above formula: VW (i, j, p) is the virtual water flow of crop p from i province to j province, in m 3 A; t (i, j, p) is the trade traffic of crop p from i province to j province in ton/a;
defining a climate zone to which the measuring and calculating zone belongs, and calculating the production water footprint benchmark of each crop in the climate zone to which the measuring and calculating zone belongs; dividing a measuring and calculating area into an arid area and a wetting area according to an arid index AI, sequencing the grid scale crop production water footprints of the arid area and the wetting area from low to high respectively, and recording the grid crop production water footprints as the current year water footprint standard of the crop when the corresponding accumulated crop yield of a certain grid reaches a certain proportion of the current year total yield of the crop, thereby obtaining the crop production water footprint standard of different climate areas;
calculating the water footprint standard of each crop production in each province in the measuring and calculating area, and comparing the water footprint standard of each crop production in the climate area to which the province belongs, so as to evaluate the high efficiency of the crop production in the province; sequencing the water footprint of each crop in each province in the area from low to high, when the accumulated output of a certain grid corresponds to 50% of the annual output of the crop in each province, and when the water footprint of the crop corresponding to the grid is lower than the water footprint reference of the crop in the climate area to which the province belongs, considering that the crop in each province is produced efficiently, otherwise, the crop in each province is not produced efficiently, and further judging that the virtual water flow of the crop in each province is efficient or inefficient;
according to the measurement and calculation region grid scale blue water shortage index BWS, evaluating the uncontrollable virtual blue water flow quantity of each crop;
the expression for calculating the crop non-sustainable virtual blue water flow is as follows:
BVw unsus (i，p)＝BVW(i，p)×σ
in the above formula: BVw unsus (i, p) is the non-sustainable virtual blue water flow of the i province crop p, the unit is m 3 A; BVW (i, p) is the total virtual blue water flow of the i province crop p, and the unit is m 3 A; sigma is the proportion of the sustainable blue water footprint consumed by the i-province production crop p to the total blue water footprint;
calculating indirect water saving quantity generated by trade circulation according to the production water footprint and corresponding trade quantity of each crop import and export area;
the expression for calculating the indirect water saving amount generated by trade circulation is as follows:
ΔS(i，j，p)＝T(i，j，p)×(WF(i，p)-WF(j，p))
in the above formula: ΔS (i, j, p) is the indirect water saving amount produced by the trade circulation of crops p from i province to j province, and the unit is m 3 A; WF (j, p) is the unit production water footprint of j-province crops p, and the unit is m 3 /ton；
According to the grid scale blue water shortage index BWS and the water footprint benchmark of the measuring areas, evaluating the synergy of the production efficiency and the sustainability of each crop in each measuring area;
and evaluating the synergy of the production efficiency and the sustainability of each crop in each measuring and calculating area according to the following expression:
in the above formula: SI is a synergistic evaluation index of the production efficiency and sustainability of crops p in i province, WS i，b A "benchmark" for i province blue water shortage index; WS (WS) i Blue water shortage value is i; WS (WS) max ，WS min Respectively refers to the maximum value and the minimum value of the blue water-saving shortage value; WF (WF) i，b For the production water footprint standard of the crop p in the province of i, the unit is m 3 /ton；WF i Producing a water footprint for the i province crop p in m 3 /ton；WF max ，WF min Respectively refers to the maximum value and the minimum value of the production water footprint of the crop p in the province, and the unit is m 3 /ton。
2. The method for evaluating the effect and the synergy of the virtual water flow resource according to claim 1, wherein the obtaining the water footprint of each crop production and the trade data of the crop circulation in the measuring and calculating area in the measuring and calculating period comprises: acquiring the blue water footprint, green water footprint and crop yield of the crop production of the calculation space unit, and calculating the annual total yield of each crop and import and export data of each crop in the measuring and calculating area; acquiring an drought index AI in a measuring and calculating area; and obtaining a blue water shortage index BWS in the measuring and calculating area.
3. A virtual water flow resource effect and synergy evaluation system, comprising:
the production water footprint and circulation trade data acquisition module is used for acquiring the production water footprints of all crops and the circulation trade data of the crops in the measuring and calculating area in the measuring and calculating period;
the unit production water footprint calculation module is used for calculating the production water footprints of all crop units in the annual region; the expression of the water footprint WF (i, p) produced by each crop unit in the calculated annual region is as follows:
in the above formula: WF (i, p) is the unit production water footprint of the i province crop p, the unit is m 3 /ton；WF total (i, p) is the total water footprint of the i province crop p in m 3 A; y is the yield of the i province crop p, and the unit is ton/a;
the virtual water flow quantity calculation module is used for calculating and measuring the virtual water flow quantity of each crop in the annual region; the expression of the virtual water flow VW (i, j, p) of each crop in the calculation and calculation annual region is as follows:
VW(i，j，p)＝T(i，j，p)×WF(i，p)
in the above formula: VW (i, j)P) is the virtual water flow rate of crops p from i province to j province, the unit is m 3 A; t (i, j, p) is the trade traffic of crop p from i province to j province in ton/a;
the production water footprint reference calculation module of the climatic zone is used for defining the climatic zone of the measuring and calculating zone and calculating the production water footprint reference of each crop in the climatic zone; dividing a measuring and calculating area into an arid area and a wetting area according to an arid index AI, sequencing the grid scale crop production water footprints of the arid area and the wetting area from low to high respectively, and recording the grid crop production water footprints as the current year water footprint standard of the crop when the corresponding accumulated crop yield of a certain grid reaches a certain proportion of the current year total yield of the crop, thereby obtaining the crop production water footprint standard of different climate areas;
the province production high efficiency evaluation module is used for calculating the production water footprint standard of each province of each crop in the measuring and calculating area and comparing the province with the production water footprint standard of each crop in the climate area to which the province belongs so as to evaluate the high efficiency of the province production of the crops; sequencing the water footprint of each crop in each province in the area from low to high, when the accumulated output of a certain grid corresponds to 50% of the annual output of the crop in each province, and when the water footprint of the crop corresponding to the grid is lower than the water footprint reference of the crop in the climate area to which the province belongs, considering that the crop in each province is produced efficiently, otherwise, the crop in each province is not produced efficiently, and further judging that the virtual water flow of the crop in each province is efficient or inefficient;
the non-sustainable virtual blue water flow rate evaluation module is used for evaluating the non-sustainable virtual blue water flow rate of each crop according to the grid scale blue water shortage index BWS of the measuring area; the expression for calculating the crop non-sustainable virtual blue water flow is as follows:
BVw unsus (i，p)＝BVW(i，p)×σ
in the above formula: BVw unsus (i, p) is the non-sustainable virtual blue water flow of the i province crop p, the unit is m 3 A: BVW (i, p) is the total virtual blue water flow of the i province crop p, and the unit is m 3 A; sigma is the proportion of the sustainable blue water footprint consumed by the i-province production crop p to the total blue water footprint;
the trade circulation indirect water quantity calculating module is used for calculating the indirect water saving quantity generated by the trade circulation according to the production water footprints and the corresponding trade quantities of the import and export areas of the crops; the expression for calculating the indirect water saving amount generated by trade circulation is as follows:
ΔS(i，j，p)＝T(i，j，p)×(WF(i，p)-WF(j，p))
in the above formula: ΔS (i, j, p) is the indirect water saving amount produced by the trade circulation of crops p from i province to j province, and the unit is m 3 A; WF (j, p) is the unit production water footprint of j-province crops p, and the unit is m 3 /ton；
The production efficiency and sustainability synergy evaluation module is used for evaluating the synergy of the production efficiency and sustainability of each crop in each measuring and calculating area according to the grid scale blue water shortage index BWS and the water footprint standard of the measuring and calculating area; and evaluating the synergy of the production efficiency and the sustainability of each crop in each measuring and calculating area according to the following expression:
in the above formula: SI is a synergistic evaluation index of the production efficiency and sustainability of crops p in i province, WS i，b A "benchmark" for i province blue water shortage index; WS (WS) i Blue water shortage value is i; WS (WS) max ，WS min Respectively refers to the maximum value and the minimum value of the blue water-saving shortage value; WF (WF) i，b For the production water footprint standard of the crop p in the province of i, the unit is m 3 /ton；WF i Producing a water footprint for the i province crop p in m 3 /ton；WF max ，WF min Respectively refers to the maximum value and the minimum value of the production water footprint of the crop p in the province, and the unit is m 3 /ton。
4. A computer-readable storage medium storing a computer program, characterized in that: the computer program when executed by a processor implements the steps of the virtual water flow resource effect and synergy evaluation method of any one of claims 1 to 2.
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