CN102663527A - Water resource ecological sensitivity analysis method for urban and rural planning - Google Patents

Abstract

The invention discloses a method for quantitative partition by using a water resource factor, and the method comprises the following steps: surveying and measuring multiple water resource single factors in a target area and drawing the result to be a thematic map; vectoring each water resource single factor by using a GIS (Geographic Information System), establishing the unified coordinate system and drawing each water resource single factor map; grading each water resource single factor based on the preset grading standard; determining the weight value of each water resource single factor by using an analytic hierarchy process; overlapping the multiple water resource single factors by using the GIS; carrying out weighted average on each water resource single factor to obtain the water resource factor analysis result; and classifying the water resource factor analysis result by using a forced normal distribution method to finish a water resource factor analysis chart so as to carry out quantitative partition on the target area. According to the method for quantitative partition by using a water resource factor, the water resource utilization and planning can be analyzed and researched more scientifically and objectively.

Description

The ecological sensibility analysis method of a kind of water resource of urban and rural planning

Technical field

The present invention relates to environmental science and urban ecological planning field, particularly relate to and utilize the water resource class factor to carry out the quantification partitioned method.

Background technology

Water resource class factor-analysis approach is special a kind of space ecological analysis method to water resource in the town and country ecological planning class factor-analysis approach, is used for the spatial analysis of town and country ecological planning.Through analyzing, study and estimate characteristic elements such as human settlements ecosystem water resource quality and quantity and space distribution; To have the several leading factor that influence subject area human settlements and natural ecosystems sound development and ecological safety and compose the weighted values stack; The quantitative evaluation water resource is to natural ecosystems and human settlements Ecosystem System Influence; Thereby, also be that the calculating of water resource carrying capacity in the urban and rural planning lays the foundation for regional water resources research and ecological suitability evaluation provide foundation.

Water resources assessment method representativeness mainly contains following several types at present:

(1) water yield equalization:, set up the method that water yield equilibrium equation carries out water resources assessment based on principle of water balance.The method definite in principle, computing formula are simple, but computational item is more sometimes, and some balance element is difficult to accurate mensuration, even will spend bigger exploration experiment work amount.The result of calculation of water yield equalization can the reflecting regional water resource macroscopical situation, and can not reflect and estimate in the district because the hydrographic water resource condition changes or the variation of the partial water resource that inequality produced of mining rate.For ecological planning, can't combine with other relevant specialities, can not system analyze.

(2) deterministic models: be that the hydrographic water resource condition of complicacy has been carried out certain simplification, portray a kind of structural relation of actual current on space-time with one group of relationship.Most widely used is deterministic models, is meant that the mutual relationship between the motion key element of water in mathematical model is a deterministic dependence.Keep the weighing apparatus law according to quality and set up mathematical model, have the Method of Mathematical Physics of tight physical concept and mathematical formulae.Such model is decided the problem of separating by what PDE and starting condition, boundary condition were formed.Be applicable to that generally boundary condition is simple, the area that data information is more complete, this method can obtain water resource at spatial distribution state, but can't directly show the influence situation of water resource to natural ecosystems.Because modeling process is complicated, in ecological planning, is difficult to widespread use, can obtain the water resources assessment result that made as a reference.

Summary of the invention

The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides a kind of useful commerce to select at least.For this reason, one object of the present invention is to propose a kind of water resource class factor of utilizing and carries out the quantification partitioned method.

The water resource class factor of utilizing according to the embodiment of the invention is carried out the quantification partitioned method, may further comprise the steps: step S100, investigate measurement to a plurality of water resource single-factors, and the result be depicted as thematic maps in the target area; Step S200 uses the GIS vector quantization with each said water resource single-factor, sets up the unified coordinate system system, draws each said water resource single-factor figure; Step S 300, and each said water resource single-factor is carried out classification according to preset grade scale; Step S400 adopts analytical hierarchy process to confirm the monofactorial weighted value of each said water resource; Step S500 adopts GIS that said a plurality of water resource single-factors are superposeed mutually; Step S600 obtains water resource class results of factor analysis to each said water resource single-factor weighted mean; With step S700, adopt and force normal distribution method that said water resource class results of factor analysis is classified with completion water resource class factorial analysis figure, thereby the quantification subregion is carried out in the target area.

The water resource class factor of utilizing according to the embodiment of the invention is carried out the quantification partitioned method; Through GIS the indication information of water resource each side is comprehensively superposeed; Utilize analytical hierarchy process to set up the quantification system; The water resource class factor to the target area of quantification is analyzed; Overcoming the defective that situation of water resource evaluation that the water resource class factor in the ecological planning of town and country exists in estimating is not built with direct guiding plan comprehensively, proposed the water resource class factor evaluation method of quantification, also is that the calculating of water resource carrying capacity in the urban and rural planning lays the foundation.

In addition, the resources-type factor of water according to the above embodiment of the present invention is carried out the quantification partitioned method and can also be had following additional technical characterictic:

According to one embodiment of present invention, said a plurality of water resource single-factor comprises rainfall amount distribution, surface water situation, hydraulic engineering, groundwater resource situation, water-bearing zone type and lithology, uses aqueous condition.

According to one embodiment of present invention, said step S200 may further comprise the steps:

Step S201, with said each water resource single-factor vector quantization, polar plot is continuously nonoverlapping unique territory, unique territory is meant that each key element of vector quantization interconnects but non-overlapping copies, need meet the following conditions

S1∪S2∪...∪Sn＝S

Si∩Sj＝0

S is the monofactorial scope of each water resource, and S1, S2, Si, Sj, Sn etc. are meant a plurality of small area that each water resource single-factor the inside is divided, and n is the zonule sum; With

Step S202 sets up unified coordinate system system, to each the water resource single-factor figure behind the vector quantization in GIS, define projection, conversion is projected as the Gauss projection coordinate system and draws each said water resource single-factor figure.

According to one embodiment of present invention, said step S400 may further comprise the steps:

Step S401, said a plurality of water resource single-factors are n, relatively n water resource single-factor yz=(yz ₁, yz ₂... yz _n) to the influence of target zz (situation of water resource), thus confirm their shared proportion in z, get two factor y at every turn _iAnd y _jUse a _IjExpression y _iWith y _jTo the ratio of the influence degree of z, measure a in 1～9 ratio scale _Ij, with numeral 1～9 and reciprocal, obtain weighted value by the difference of monofactorial importance value of each water resource of quantification shown in the table 1 and influence property as scale,

Table 1 weight fiducial value

Judgment value	Comparison	Intensity
			1	Y i＝Y j	Equate
3	Y i＞∞Y j	Y iBe better than Y slightly j

5	Y i＞＞Y j	Y iObviously be better than Y j
			7	Y i＞＞＞Y j	Y iCompare Y jMuch better
9	Y i＞Y j	Y iExtremely be better than Y j
			1/3	Y i＜Y j	Y iSlightly inferior to Y j
1/5	Y i＜＜Y j	Y iObviously inferior to Y j
			1/7	Y i＜＜＜Y j	Y iCompare Y jMuch inferior
1/9	Y i＜∞Y j	Y iDefinitely inferior to Y j

Annotate: 2,4,6,8 and 1/2,1/4,1/6,1/8 expression intensity is between corresponding adjacent rank;

Step S402, n is constituted one by water resource single-factor relatively and compares the judgment matrix A=(a of (in pairs relatively) in twos _Ij) _{N * n.}, obviously, judgment matrix has character:

$A=\left(\begin{array}{cccccc}{a}_{11}& a_{12}& \·& \·& \·& a_{1n}\\ a_{21}& a_{22}& \·& \·& \·& a_{2n}\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ a_{n1}& a_{n2}& \·& \·& \·& a_{\mathrm{nn}}\end{array}\right)$

a _ij＞0， $a_{\mathrm{ji}}=\frac{1}{a_{\mathrm{ij}}},$ a _ij＝1(i，j＝1，2，...n)

Step S403, weight coefficient calculates, the product Z of each row of judgment matrix _iThen press

Formula calculates Z _iN th root W _i, to vectorial W _i=[W ₁, W ₂... W _n] ^TCarry out normalization and calculate, obtain proper vector,

Calculate maximum characteristic root $\mathrm{\λ}\mathrm{Max}={\mathrm{\Σ}}_{i=1}^n\frac{\left(\mathrm{KW}\right)i}{\mathrm{NWi}}$

Step S404 carries out consistency check to each the water resource single-factor weighted value that obtains, and the check formula is CI=(λ max-n)/(n-1)

Step S405 obtains the monofactorial weight of each water resource mean value of wi as a result,

$\mathrm{Wi}=\frac{{\mathrm{\Σ}}_{i=1}^m\mathrm{Di}}{m}$ And w1+w2+...+wn=1

Wherein wi is a water resource single-factor weight, and m is for calculating the sum of weight, and di is the monofactorial weighted value of this water resource.

According to one embodiment of present invention, the average weighted formula among the said step S600 is:

Lt＝f1*w1+f2*w2+...+fn*wn

Wherein Lt is meant the numerical value of the water resource class factor, and f1-fn is meant each water resource single-factor grade separation value, and w1-wn is the monofactorial weighted value of each water resource.

Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.

Description of drawings

Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment in conjunction with figs, wherein:

Fig. 1 carries out the process flow diagram of the method for quantitative ecological zoning according to the water resource class factor of utilizing of the embodiment of the invention;

Fig. 2 carries out the synoptic diagram that in the method for quantitative ecological zoning a plurality of water resource single-factors is superposeed mutually according to the water resource class factor of utilizing of the embodiment of the invention.

Embodiment

Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, be intended to be used to explain the present invention, and can not be interpreted as limitation of the present invention.

In description of the invention; It will be appreciated that; The orientation of indications such as term " " center ", " vertically ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " clockwise ", " counterclockwise " or position relation are for based on orientation shown in the drawings or position relation; only be to describe with simplifying for the ease of describing the present invention; rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.

In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more a plurality of these characteristics can be shown or impliedly comprised to the characteristic that is limited with " first ", " second " clearly.In description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more, only if clear and definite qualification is arranged in addition.

In the present invention, only if clear and definite regulation and qualification are arranged in addition, broad understanding should be done in terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly through intermediary, can be the connection of two element internals.For those of ordinary skill in the art, can understand above-mentioned term concrete implication in the present invention as the case may be.

In the present invention; Only if clear and definite regulation and qualification are arranged in addition; First characteristic second characteristic it " on " or D score can comprise that first and second characteristics directly contact, can comprise that also first and second characteristics are not directly contacts but through the contact of the additional features between them.And, first characteristic second characteristic " on ", " top " and " above " comprise first characteristic directly over second characteristic and oblique upper, or only represent that the first characteristic level height is higher than second characteristic.First characteristic second characteristic " under ", " below " and " below " comprise first characteristic directly over second characteristic and oblique upper, or only represent that the first characteristic level height is less than second characteristic.

Describe in detail according to the water resource class factor of utilizing of the embodiment of the invention with reference to accompanying drawing below and carry out the quantification partitioned method.

To shown in Figure 2, carry out the quantification partitioned method like Fig. 1, may further comprise the steps according to the water resource class factor of utilizing of the embodiment of the invention:

Step S100 investigates measurement to a plurality of water resource single-factors, and the result is depicted as thematic maps in the target area.Specifically, collect the water resource information of target area, investigate, measure, analyze, be depicted as thematic maps.The information content should contain: rainfall amount distribution, surface water situation (surface water resources amount, surface water amount usable), hydraulic engineering, groundwater resource situation (groundwater resources amount, allowable groundwater withdrawal), water-bearing zone type and lithology, with aqueous condition (surface water is used aqueous condition with aqueous condition, underground water) etc.

Step S200 uses the GIS vector quantization with each said water resource single-factor, sets up the unified coordinate system system, draws each said water resource single-factor figure.

For example, select rainfall amount distributions, surface water situation, groundwater condition,, each water resource single-factor is used the GIS vector quantization, set up unified coordinate system, drafting water resource single-factor figure with the main water resource class single-factor in four types of the aqueous conditions.

Particularly, with each water resource single-factor vector quantization, it is continuously nonoverlapping unique territory that polar plot requires.Unique territory is meant that each key element of vector quantization interconnects but non-overlapping copies.This be since in city planning every land used only corresponding to a kind of water resource character be determine.Need meet the following conditions

S1∪S2∪...∪Sn＝S

Si∩Sj＝0

Wherein, S is certain monofactorial scope, and S1, S2, Si, Sj, Sn etc. are meant a plurality of small area that certain water resource single-factor the inside is divided, and n is the zonule sum.

Then, set up unified coordinate system system, the water resource single-factor figure behind the vector quantization is unified in defines projection among the GIS, conversion is projected as Gauss projection coordinate system commonly used.

Step S300 carries out classification with each said water resource single-factor according to preset grade scale.

To each water resource single-factor of choosing according to city planning with build susceptibility and importance divided rank.Grade is low more, and susceptibility is strong more, and uncomfortable more Yicheng City is built; Otherwise grade is high more, and is suitable constructive strong more, meets the requirement of urban construction more.

Step S400 adopts analytical hierarchy process to confirm the monofactorial weighted value of each said water resource.

Particularly, a plurality of water resource single-factors are n, relatively n water resource single-factor yz=(yz ₁, yz ₂... yz _n) to the influence of target zz (situation of water resource), thus confirm their shared proportion in z, get two factor y at every turn _iAnd y _jUse a _IjExpression y _iWith y _jTo the ratio of the influence degree of z, measure a in 1～9 ratio scale _IjWith numeral 1～9 and reciprocal, obtain weighted value by the difference of monofactorial importance value of the different water of quantification shown in the table 1 resource and influence property as scale.

Table 1

Judgment value	Comparison	Intensity
			1	Y i＝Y j	Equate
3	Y i＞∞Y j	Y iBe better than Y slightly j
			5	Y i＞＞Y j	Y iObviously be better than Y j
7	Y i＞＞＞Y j	Y iCompare Y jMuch better

9	Y i＞Y j	Y iExtremely be better than Y j
			1/3	Y i＜Y j	Y iSlightly inferior to Y j
1/5	Y i＜＜Y j	Y iObviously inferior to Y j
			1/7	Y i＜＜＜Y j	Y iCompare Y jMuch inferior
1/9	Y i＜∞Y j	Y iDefinitely inferior to Y j

Annotate: 2,4,6,8 and 1/2,1/4,1/6,1/8 expression intensity is between corresponding adjacent rank.

N is constituted one by element relatively and compares the judgment matrix A=(a of (in pairs relatively) in twos _Ij) _{N * n.}Obviously, judgment matrix has character:

$A=\left(\begin{array}{cccccc}{a}_{11}& a_{12}& \·& \·& \·& a_{1n}\\ a_{21}& a_{22}& \·& \·& \·& a_{2n}\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ a_{n1}& a_{n2}& \·& \·& \·& a_{\mathrm{nn}}\end{array}\right)$

a _ij＞0， $a_{\mathrm{ji}}=\frac{1}{a_{\mathrm{ij}}},$ a _ii＝1(i，j＝1，2，...n)

Weight coefficient calculates.The product Z of each row of judgment matrix _iThen press

Formula calculates Z _iN th root W _iTo vectorial W _i=[W ₁, W ₂... W _n] ^TCarry out normalization and calculate, obtain proper vector.

Calculate maximum characteristic root λ max: $\mathrm{\λ}\mathrm{Max}={\mathrm{\Σ}}_{i=1}^n\frac{\left(\mathrm{KW}\right)i}{\mathrm{NWi}}$

Water resource single-factor weighted value to obtaining carries out consistency check.

In order to check the consistency problem of judgment matrix; The consistance that needs to calculate coincident indicator CI judgment matrix also has randomness; This consistance at random can represent that the value of RI is relevant with the dimension size of matrix with mean random coincident indicator RI, relative uniformity index CR=CI/RI.It is generally acknowledged that when CR≤0.1, judgment matrix meets the crash consistency condition basically; When CR＞0.1, given judgment matrix does not meet the crash consistency condition, need adjust and revise.

CI=(λ max-n)/(n 1)

Popular, if 1 pair of single-factor of water resource single-factor, 2 influence value a＞1 (being that single-factor 1 is bigger than single-factor 2), 2 pairs of single-factors of single-factor, 3 influence value b＞1, then in logic, 1 pair of single-factor 3 influence value of single-factor are c=ab＞1 certainly.But it is impossible when being configured to the comparison matrix, requiring to satisfy c=ab.Therefore move back and require paired comparator matrix that certain consistance is arranged.If c＜1, then the result is inconsistent, must recomputate weighted value.

Obtain the monofactorial weight of each water resource w as a result _iMean value.

$\mathrm{Wi}=\frac{{\mathrm{\Σ}}_{i=1}^m\mathrm{Di}}{m}$ And w1+w2+...+wn=1

Wherein wi is a certain single-factor weight, and m is for calculating the sum of weight, and di is the monofactorial some weighted values of this water resource.

Step S500 adopts GIS that said a plurality of water resource single-factors are superposeed mutually.As shown in Figure 2, utilize the GIS geographical information technology to merge stack each other each water resource single-factor, stacked system is represented two different single-factors respectively for the key element of input, and the figure layer of output has kept two monofactorial all characteristics.

Step S600 obtains water resource class results of factor analysis to each said water resource single-factor weighted mean.

Lt＝f1*w1+f2*w2+...+fn*wn

Wherein Lt is meant the numerical value of the water resource class factor, and f1-fn is meant each water resource single-factor grade separation value, and w1-wn is the monofactorial weighted value of each water resource.

Step S700 adopts and forces normal distribution method that said water resource class results of factor analysis is classified with completion water resource class factorial analysis figure, thereby the quantification subregion is carried out in the target area.

Forcing normal distribution is according to the normal distribution principle; The regularity of distribution of " broad in the middle, two is little " that promptly is commonly called as; Confirm opinion rating and each grade shared number percent in sum in advance, confirm the protection border of the plant class factor then according to the analysis result of the plant class factor.

The water resource class factor of utilizing according to the embodiment of the invention is carried out the quantification partitioned method; Through GIS the indication information of water resource each side is comprehensively superposeed; Utilize analytical hierarchy process to set up the quantification system, the analyzing of quantification, the science utilization and the planning of water resource of analyzing and researching objectively more to the water resource class factor of target area; And then utilize water resource class factor pair target area to carry out quantitative ecological zoning, the auxiliary planning boundary of confirming the target area construction land.Through using the present invention; Overcome situation of water resource evaluation that the water resource class factor in the ecological planning of town and country exists in estimating comprehensively with the direct defective of guiding plan construction; Proposed the water resource class factor evaluation method of quantification, also the calculating for water resource carrying capacity in the urban and rural planning lays the foundation.

Be that example is sketched according to the water resource class factor of utilizing of the embodiment of the invention and carried out the quantification partitioned method below with the Huairou District, Beijing City.

Collecting on annual rainfall distribution, surface water situation (surface water resources amount, surface water amount usable), hydraulic engineering, groundwater resource situation (groundwater resources amount, allowable groundwater withdrawal), water-bearing zone lithology, basis with aqueous condition (surface water is used aqueous condition with aqueous condition, underground water) data; Select rainfall amount distribution, surface water distribution, hydraulic engineering, 4 single-factors of mining of groundwater degree for use, set up each monofactorial evaluation criterion.For example rainfall amount distributes, and rainfall amount is divided into Pyatyi, and the rainfall amount minimum is 1 for the 500mm assignment; The 501mm-550mm assignment is 2, and the 551mm-600mm assignment is 3, and the 601mm-650mm assignment is 4; The 651mm-700mm assignment is 5, and along with the increase of rainfall amount, score value is high more; 5 expression water resources condition are better, and the suitable human development in this district is referring to table 2.

Table 2 water resource class single-factor complete list

Adopt analytical hierarchy process to carry out weight calculation, the result sees table 3.Calculate through carrying out the spatial analysis stack in the GIS-Geographic Information System, ask for evaluation result.Formulate the suitable classification of evaluation set, the influence of each regional water resource to ecologic environment reflected in construction water resource class factor evaluation district.

Table 3 water resource class factor expert weight is estimated consolidated statement

According to evaluation result, Huairou District can be divided into ten grades, and grade point is big more, shows as suitable more human settlements.Cherish the area in the self-restraint district, River system basin, around the big one-level underground water of the rainfall amount distribution intensity seedbed; Water resource is abundanter, and ranking score is lower, is generally less than 2.5; Relatively more suitable nature; Should strengthen the water protection in this scope, improve its ecological self-restraint function, and can not in this zone, develop construction; Grade point is the also area of suitable human settlements of nature that both suits between 2.5-3.5; All the other areas, the grade score value is higher relatively, and branch cloth such as interior river course, zone are less, relatively more suitable human settlements, development & construction can not produce havoc to nature and water source.

In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.

Although illustrated and described embodiments of the invention above; It is understandable that; The foregoing description is exemplary; Can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change the foregoing description under the situation that does not break away from principle of the present invention and aim within the scope of the invention, modification, replacement and modification.

Claims (5)

1. one kind is utilized the water resource class factor to carry out the quantification partitioned method, it is characterized in that, may further comprise the steps:

Step S100 investigates measurement to a plurality of water resource single-factors, and the result is depicted as thematic maps in the target area;

Step S200 uses the GIS vector quantization with each said water resource single-factor, sets up the unified coordinate system system, draws each said water resource single-factor figure;

Step S300 carries out classification with each said water resource single-factor according to preset grade scale;

Step S400 adopts analytical hierarchy process to confirm the monofactorial weighted value of each said water resource;

Step S500 adopts GIS that said a plurality of water resource single-factors are superposeed mutually;

Step S600 obtains water resource class results of factor analysis to each said water resource single-factor weighted mean; With

Step S700 adopts and forces normal distribution method that said water resource class results of factor analysis is classified with completion water resource class factorial analysis figure, thereby the quantification subregion is carried out in the target area.

2. the water resource class factor of utilizing according to claim 1 is carried out the quantification partitioned method; It is characterized in that said a plurality of water resource single-factors comprise rainfall amount distribution, surface water situation, hydraulic engineering, groundwater resource situation, water-bearing zone type and lithology, use aqueous condition.

3. the water resource class factor of utilizing according to claim 1 is carried out the quantification partitioned method, it is characterized in that said step S200 may further comprise the steps:

Step S201, with said each water resource single-factor vector quantization, polar plot is continuously nonoverlapping unique territory, unique territory is meant that each key element of vector quantization interconnects but non-overlapping copies, need meet the following conditions

S1∪S2∪...∪Sn＝S

Si∩Sj＝0

S is the monofactorial scope of each water resource, and S1, S2, Si, Sj, Sn etc. are meant a plurality of small area that each water resource single-factor the inside is divided, and n is the zonule sum; With

Step S202 sets up unified coordinate system system, to each the water resource single-factor figure behind the vector quantization in GIS, define projection, conversion is projected as the Gauss projection coordinate system and draws each said water resource single-factor figure.

4. the water resource class factor of utilizing according to claim 1 is carried out the quantification partitioned method, it is characterized in that said step S400 may further comprise the steps:

Step S401, said a plurality of water resource single-factors are n, relatively n water resource single-factor yz=(yz ₁, yz ₂... yz _n) to the influence of target zz (situation of water resource), thus confirm their shared proportion in z, get two factor y at every turn _iAnd y _jUse a _IjExpression y _iWith y _jTo the ratio of the influence degree of z, measure a in 1～9 ratio scale _Ij, with numeral 1～9 and reciprocal, obtain weighted value by the difference of monofactorial importance value of each water resource of quantification shown in the table 1 and influence property as scale,

Table 1 weight fiducial value

Judgment value Comparison Intensity 1 Y _i＝Y _j Equate 3 Y _i＞∞Y _j Y _iBe better than Y slightly _j 5 Y _i＞＞Y _j Y _iObviously be better than Y _j 7 Y _i＞＞＞Y _j Y _iCompare Y _jMuch better 9 Y _i＞Y _j Y _iExtremely be better than Y _j 1/3 Y _i＜Y _j Y _iSlightly inferior to Y _j 1/5 Y _i＜＜Y _j Y _iObviously inferior to Y _j 1/7 Y _i＜＜＜Y _j Y _iCompare Y _jMuch inferior 1/9 Y _i＜∞Y _j Y _iDefinitely inferior to Y _j

Annotate: 2,4,6,8 and 1/2,1/4,1/6,1/8 expression intensity is between corresponding adjacent rank;

Step S402, n is constituted one by water resource single-factor relatively and compares the judgment matrix A=(a of (in pairs relatively) in twos _Ij) _{N * n.}, obviously, judgment matrix has character:

$A=\left(\begin{array}{cccccc}{a}_{11}& a_{12}& \·& \·& \·& a_{1n}\\ a_{21}& a_{22}& \·& \·& \·& a_{2n}\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ \·& \·& & & & \·\\ a_{n1}& a_{n2}& \·& \·& \·& a_{\mathrm{nn}}\end{array}\right)$

a _ij＞0， $a_{\mathrm{ji}}=\frac{1}{a_{\mathrm{ij}}},$ a _ij＝1(i，j＝1，2，...n)

Step S403, weight coefficient calculates, the product Z of each row of judgment matrix _iThen press

Formula calculates Z _iN th root W _i, to vectorial W _i=[W ₁, W ₂... W _n] ^TCarry out normalization and calculate, obtain proper vector,

Calculate maximum characteristic root $\mathrm{\λ}\mathrm{Max}={\mathrm{\Σ}}_{i=1}^n\frac{\left(\mathrm{KW}\right)i}{\mathrm{NWi}}$

Step S404 carries out consistency check to each the water resource single-factor weighted value that obtains, and the check formula is CI=(λ max-n)/(n-1)

Step S405 obtains the monofactorial weight of each water resource mean value of wi as a result,

$\mathrm{Wi}=\frac{{\mathrm{\Σ}}_{i=1}^m\mathrm{Di}}{m}$ And w1+w2+...+wn=1

Wherein wi is a water resource single-factor weight, and m is for calculating the sum of weight, and di is the monofactorial weighted value of this water resource.

5. the water resource class factor of utilizing according to claim 1 is carried out the quantification partitioned method, it is characterized in that the average weighted formula among the said step S600 is:

Lt＝f1*w1+f2*w2+...+fn*wn

Wherein Lt is meant the numerical value of the water resource class factor, and f1-fn is meant each water resource single-factor grade separation value, and w1-wn is the monofactorial weighted value of each water resource.

Images