CN107038495A - A kind of method of inspection of Groundwater Vulnerability evaluation result - Google Patents
A kind of method of inspection of Groundwater Vulnerability evaluation result Download PDFInfo
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- CN107038495A CN107038495A CN201710181914.6A CN201710181914A CN107038495A CN 107038495 A CN107038495 A CN 107038495A CN 201710181914 A CN201710181914 A CN 201710181914A CN 107038495 A CN107038495 A CN 107038495A
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Abstract
The present invention provides a kind of method of inspection of Groundwater Vulnerability evaluation result, can verify that the validity and reliability of Groundwater Vulnerability evaluation result.Methods described includes：A) frangibility zoning where pollutant maximum concentration and the frangibility zoning where least concentration, are determined；B) the corresponding total quantity control on emission of each grade of Groundwater Vulnerability, is determined；C) pollutant concentration and the degree of correlation of Groundwater Vulnerability index, are calculated；D), examined by the F of variance statistic, determine statistic F values；E), pollutant concentration in underground water and Groundwater Vulnerability evaluation result are divided into the grade of identical quantity, the absolute value of rank difference is calculated；According to a), b), c), d), e), Comprehensive Comparison is carried out to underground water Evaluation of vulnerability result, evaluation result reliability is assessed.The present invention is applied to groundwater environment science and Groundwater Contamination Risk management domain.
Description
Technical field
The present invention relates to groundwater environment science and Groundwater Contamination Risk management domain, a kind of underground water is particularly related to crisp
The method of inspection of weak property evaluation result.
Background technology
In recent years, Groundwater Vulnerability evaluation is the major measure for taking underground water pollution prevention, different by distinguishing
Regional underground water sensitivity to contamination draws a circle to approve the groundwater province domain of different fragile ranks, and its evaluation result is for Groundwater
Choose to source and division of protection zones, underground water pollution prevention and control scheme, regional land use Exploitation policy are formulated, municipal refuse is stacked
Site Selection and Ground water Quality Survey screen cloth, which are set, all has certain theory directive significance.
The order of accuarcy of Groundwater Vulnerability evaluation result is not only measurement evaluation object, evaluation method accurately whether mark
Chi, is also policymaker's concern the most.At present, Groundwater Vulnerability evaluation knot is examined without direct and reliable method
The accuracy of fruit.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method of inspection of Groundwater Vulnerability evaluation result, to solve
Present in prior art without accuracy of the direct and reliable method to examine Groundwater Vulnerability evaluation result the problem of.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of inspection party of Groundwater Vulnerability evaluation result
Method, including：
A), for Groundwater Vulnerability evaluation result, frangibility zoning where pollutant maximum concentration is determined and minimum
Frangibility zoning where concentration；Wherein, the Groundwater Vulnerability evaluation result includes：Groundwater Vulnerability index and underground
Water vulnerability class division result, the pollutant is certain category feature pollutant；
B), according to underground water vulnerability class division result, the corresponding pollutant of each grade of Groundwater Vulnerability is determined
Mean concentration；
C) pollutant concentration and the degree of correlation of Groundwater Vulnerability index, are calculated；
D), examined by the F of variance statistic, determine statistic F values, wherein, F values are bigger, represent under corresponding to differently
Pollutant concentration identical situation in water vulnerability class is fewer；
E), pollutant concentration in underground water and Groundwater Vulnerability evaluation result are divided into the grade of identical quantity, is counted
Calculate the absolute value of rank difference；
D), according to a), b), c), d), e), Comprehensive Comparison is carried out to underground water Evaluation of vulnerability result, assesses and evaluates
As a result reliability.
Further, the degree of correlation Spearman rank correlation of the pollutant concentration and Groundwater Vulnerability index
Coefficient represents, wherein, the Spearman rank correlation coefficient is expressed as：
In formula, ρ represents Spearman rank correlation coefficient, and N is sample size；diRepresent that feature pollutes in i-th of sample
Thing is ranked and vulnerability index seniority among brothers and sisters ranking is poor.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to a), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, obtain pollutant least concentration and appear in the low area of Groundwater Vulnerability or relatively low area, and pollutant maximum concentration is appeared in
The medium area of Groundwater Vulnerability, higher area or high area, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to b), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the corresponding total quantity control on emission of Groundwater Vulnerability each grade is obtained as the rising of Groundwater Vulnerability grade is in
Existing ascendant trend, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to c), when underground water Evaluation of vulnerability result is analyzed, Spearman rank correlation coefficient ρ's is exhausted
It is bigger to being worth, represent that the degree of correlation of pollutant concentration and Groundwater Vulnerability index is stronger；
Spearman rank correlation coefficient ρ absolute value is smaller, represents pollutant concentration and Groundwater Vulnerability index
Degree of correlation is weaker.
Further, the statistic F values are expressed as：
In formula, SReturnFor regression sum of square, SIt is residualFor remaining quadratic sum, n is sample content, and k is the quantity of independent variable.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the poor absolute value of rank of the Groundwater Vulnerability rank obtained and pollutant concentration rank is less than or equal to default first threshold
During value, then judge that Groundwater Vulnerability evaluation result is reasonable.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the difference between the Groundwater Vulnerability rank and pollutant concentration rank that obtain is more than the default first threshold,
And during less than or equal to default Second Threshold, then judge too high to have estimated certain described underground water Evaluation of vulnerability result.
Further, it is described according to a), b), c), d), e), Comprehensive Correlation point is carried out to underground water Evaluation of vulnerability result
Analysis includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the difference between the Groundwater Vulnerability rank and pollutant concentration rank that obtain is more than the default Second Threshold,
Then judgement is completely too high have estimated certain described underground water Evaluation of vulnerability result.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
In such scheme, by from the frangibility zoning where pollutant maximum concentration and the fragility where least concentration
The corresponding total quantity control on emission of each grade of subregion, Groundwater Vulnerability, pollutant concentration and Groundwater Vulnerability index
Degree of correlation, statistic F values, the absolute value of rank difference this 5 aspects, to underground water Evaluation of vulnerability result integrate pair
The validity and reliability of Groundwater Vulnerability evaluation result is examined than analyzing.
Brief description of the drawings
Fig. 1 is the schematic flow sheet one of the method for inspection of Groundwater Vulnerability evaluation result provided in an embodiment of the present invention；
Fig. 2 is that DRASTIC models provided in an embodiment of the present invention calculate obtained Groundwater Vulnerability block plan；
Fig. 3 is that RSIVL models provided in an embodiment of the present invention calculate obtained Groundwater Vulnerability block plan；
Fig. 4 (a) is the Groundwater Vulnerability figure under the stage division provided in an embodiment of the present invention based on EI；
Fig. 4 (b) is the Groundwater Vulnerability figure under the stage division provided in an embodiment of the present invention based on Q；
Fig. 4 (c) is the Groundwater Vulnerability figure under the stage division provided in an embodiment of the present invention based on NJ；
Fig. 4 (d) is the Groundwater Vulnerability figure under the stage division provided in an embodiment of the present invention based on GI；
Fig. 5 (a) is the rank difference figure that GI stage divisions provided in an embodiment of the present invention are obtained；
Fig. 5 (b) is the rank difference figure that NJ stage divisions provided in an embodiment of the present invention are obtained.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention examines the accurate of Groundwater Vulnerability evaluation result for existing no direct and reliable method
The problem of property, there is provided a kind of method of inspection of Groundwater Vulnerability evaluation result.
Embodiment one
Referring to shown in Fig. 1, the method for inspection of Groundwater Vulnerability evaluation result provided in an embodiment of the present invention, including：
S11, the Groundwater Vulnerability evaluation result obtained for Groundwater Vulnerability Assessment Method, determine pollutant highest
The frangibility zoning where frangibility zoning and least concentration where concentration；Wherein, the Groundwater Vulnerability evaluation result
Including：Groundwater Vulnerability index and Groundwater Vulnerability grade classification result, the pollutant are certain category feature pollutant；
S12, according to underground water vulnerability class division result, determine the corresponding pollutant of each grade of Groundwater Vulnerability
Mean concentration；
S13, calculating pollutant concentration and Groundwater Vulnerability index degree of correlation；
S14, the F inspections by variance statistic, determine statistic F values, wherein, F values are bigger, represent under corresponding to differently
Pollutant concentration identical situation in water vulnerability class is fewer；
S15, the grade that pollutant concentration in underground water and Groundwater Vulnerability evaluation result are divided into identical quantity, meter
Calculate the absolute value of rank difference；
S16, according to S11, S12, S13, S14, S15, Comprehensive Comparison is carried out to underground water Evaluation of vulnerability result, commented
Appraisal result reliability.
The method of inspection of Groundwater Vulnerability evaluation result described in the embodiment of the present invention, by from pollutant maximum concentration
The corresponding pollutant of each grade of frangibility zoning, Groundwater Vulnerability where the frangibility zoning at place and least concentration is put down
Equal concentration, the degree of correlation of pollutant concentration and Groundwater Vulnerability index, statistic F values, the absolute value this 5 of rank difference
Aspect, carries out Comprehensive Comparison to examine the validity of Groundwater Vulnerability evaluation result to underground water Evaluation of vulnerability result
And reliability.
In the present embodiment, it should be noted that, be used alone above-mentioned 5 aspects some or certain several e insufficient to explanation
The accurate and significant degree of Groundwater Vulnerability evaluation result in terms of above-mentioned 5, it is necessary to carry out after comprehensive analysis contrast, ability
Determine the accurate and significant degree of underground water Evaluation of vulnerability result.
In the present embodiment, no matter overall distribution form, sample appearance due to two variables of Spearman rank correlation coefficient
How is the size of amount, may serve to carry out dependency relation research.As an alternative embodiment, the pollutant concentration and underground
The degree of correlation of water vulnerability index represents with Spearman rank correlation coefficient, wherein, the Spearman rank correlation system
Number is expressed as：
In formula, ρ represents Spearman rank correlation coefficient, and N is sample size；diRepresent that feature pollutes in i-th of sample
Thing is ranked and vulnerability index seniority among brothers and sisters ranking is poor.
In the present embodiment, Spearman rank correlation coefficient ρ absolute value is bigger, and correlation is stronger, and coefficient correlation more connects
It is bordering on 1 or -1, the degree of correlation of the pollutant concentration and Groundwater Vulnerability index is stronger；The absolute value of coefficient correlation more connects
It is bordering on 0, the degree of correlation of the pollutant concentration and Groundwater Vulnerability index is weaker.
In the present embodiment, it may be supposed, for example, that Spearman rank correlation coefficient absolute value is in 0.8-1.0, the dirt
It is extremely strong related to contaminate thing concentration to Groundwater Vulnerability index；Spearman rank correlation coefficient absolute value is in 0.6-0.8, institute
It is strong correlation to state pollutant concentration and Groundwater Vulnerability index；Spearman rank correlation coefficient absolute value in 0.4-0.6,
The pollutant concentration is moderate related to Groundwater Vulnerability index；Spearman rank correlation coefficient absolute value exists
During 0.2-0.4, the pollutant concentration is weak related to Groundwater Vulnerability index；Spearman rank correlation coefficient absolute value
It is that the pollutant concentration is extremely weak related or without correlation to Groundwater Vulnerability index in 0.0-0.2.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S11, when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, obtain pollutant least concentration and appear in the low area of Groundwater Vulnerability or relatively low area, and pollutant maximum concentration is appeared in
The medium area of Groundwater Vulnerability, higher area or high area, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S12, when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the corresponding total quantity control on emission of Groundwater Vulnerability each grade is obtained as the rising of Groundwater Vulnerability grade is in
Existing ascendant trend, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S13, when underground water Evaluation of vulnerability result is analyzed, Spearman rank correlation coefficient ρ's
Absolute value is bigger, represents that the degree of correlation of pollutant concentration and Groundwater Vulnerability index is stronger；
Spearman rank correlation coefficient ρ absolute value is smaller, represents pollutant concentration and Groundwater Vulnerability index
Degree of correlation is weaker.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, the system
Metering F values are expressed as：
In formula, SReturnFor regression sum of square, SIt is residualFor remaining quadratic sum, n is sample content, and k is the quantity of independent variable.
In the present embodiment, for given sample data (xi1, xi2..., xik) (i=1,2 ..., n；n>K+1), calculate
Go out SReturn、SIt is residual, and then obtain F values, then F distributions tables of critical values looked into by given level of significance α obtaining critical value Fα(k,n-k-
1).Work as F>Fα(k, n-k-1), then it is assumed that under level of significance α, regression equation is significant.
In the present embodiment, pollutant concentration in underground water and Groundwater Vulnerability evaluation result are divided into identical quantity
Grade, calculating the specific steps of the absolute value of rank difference can include：
Characteristic contamination is with NO3Exemplified by-N, by NO3- N concentration is divided into 5 grades, is respectively<6mg/L, 6mg/L-10mg/
L, 10mg/L-20mg/L, 20mg/L-60mg/L,>60mg/L, class value is respectively 1,2,3,4,5；Groundwater Vulnerability is commented
Valency result is also classified into 5 grades, it is respectively low, relatively low, in, higher, height, class value is respectively 1,2,3,4,5.Then to research area
Interior each unit carries out class value and seeks difference and take absolute value respectively；Wherein, the quantity of grade can be according to practical study area situation
It is determined that.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S15, when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the poor absolute value of rank of the Groundwater Vulnerability rank obtained and pollutant concentration rank is less than or equal to default first threshold
During value, then judge that Groundwater Vulnerability evaluation result is reasonable.
In the present embodiment, it is assumed that default first threshold is 1, when Groundwater Vulnerability rank and pollutant concentration rank
When rank difference absolute value is less than or equal to 1, then judge that Groundwater Vulnerability evaluation result is reasonable.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S15, when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the difference between the Groundwater Vulnerability rank and pollutant concentration rank that obtain is more than the default first threshold,
And during less than or equal to default Second Threshold, then judge too high to have estimated certain described underground water Evaluation of vulnerability result.
In the present embodiment, it is assumed that default Second Threshold is 3, when Groundwater Vulnerability rank and pollutant concentration rank it
Between difference be more than 1, and during less than or equal to 3, then judge too high to have estimated certain described underground water Evaluation of vulnerability result.
In the embodiment of the method for inspection of foregoing Groundwater Vulnerability evaluation result, further, described
According to S11, S12, S13, S14, S15, carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to S15, when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability
As a result, the difference between the Groundwater Vulnerability rank and pollutant concentration rank that obtain is more than the default Second Threshold,
Then judgement is completely too high have estimated certain described underground water Evaluation of vulnerability result.
In the present embodiment, when the difference between Groundwater Vulnerability rank and pollutant concentration rank is more than 3, it is, for example,
4, then judgement is completely too high have estimated certain described underground water Evaluation of vulnerability result.
For a better understanding of the present invention embodiment provide Groundwater Vulnerability evaluation result the method for inspection, with study
Exemplified by area's phreatic water nitrate Evaluation of vulnerability, it is respectively adopted and evaluates the most frequently used DRASTIC of Groundwater Vulnerability at present
Model and the RSIVL models set up for research area, the groundwater azotate fragility in evaluation study area.Utilize present invention implementation
The method of inspection for the Groundwater Vulnerability evaluation result that example is provided examines DRASTIC models, the evaluation result of RSIVL models, with
Verify the applicability for the method for inspection that the present embodiment is provided.
Groundwater Vulnerability is evaluated first with DRASTIC models：
DRASTIC model hypothesis pollutants are with earth's surface Infiltration water body by earth's surface through aeration zone (including soil and aeration zone
Soil layer) enter water-bearing layer；Pollutants flow with water；Evaluates area's area and is not less than 0.405km2。
DRASTIC models are by underground water buried depth D, net increment R, anaerobic condition A, soil band medium S, landform T, bag gas
7 hydrogeological parameter compositions of band medium I and hydraulic conductivity system C etc..The standards of grading of each index are shown in Table 1 in model.
Then according to each index fragility influence size is assigned respective weights (5,4,3,2,1,5 and 3), finally by weighted sum
Formula (1) obtains Groundwater Vulnerability index, is designated as DI.According to DI by fragility be divided into it is low, relatively low, in, higher, high 5 etc.
Level.DI values are higher, and Groundwater Vulnerability is higher, otherwise fragility is lower.
DI=DWDR+RWRR+AWAR+SWSR+TWTR+IWIR+CWCRFormula (1)
In formula (1), subscript R represents desired value, and W represents the weight of index.
Each index grade classification and assignment table of the DRASTIC models of table 1
In the present embodiment, according to topography and geomorphology figure, geologic map, the hydrogeologic map being collected into, log sheet, meteoric water
The data such as the analysis result of literary data and field sampling laboratory test, by ArcGIS softwares obtain respectively underground water buried depth,
Anaerobic condition, soil media, terrain slope, hydraulic conductivity and aeration zone influence each index scoring figure layer.According to Aller
(1987) 7 index grade classifications, the assignment formulated, 5 ranks are divided into by DI according to equidistant method, with obtaining research area
Lower water Evaluation of vulnerability classification results, as shown in Figure 2.
Then, Groundwater Vulnerability is evaluated using RSIVL models：
The features such as the specific topography and geomorphology in binding area, geological structure and hydrogeologic condition, are screened crisp to underground water
The Dominated Factors of weak property, select net increment R, soil media S, aeration zone medium I, groundwater flow speed V, land use class
L5 index of type is used for the Groundwater Vulnerability in evaluation study area, determines that each index weights are respectively using Geostatistics analysis method
3rd, 5,3,4 and 5, evaluation model is designated as RSIVL.The model eliminated on the basis of former DRASTIC models underground water buried depth,
The shape gradient, four indexs of hydraulic conductivity and water-bearing layer lithology, add groundwater flow speed and land use pattern two
Individual index.The standards of grading of each index are shown in Table 2 in RSIVL models.Summation is weighted to each index using formula (2), obtained
New Groundwater Vulnerability index, is designated as RI, and RI is divided into 5 ranks according to equidistant method, obtains studying area's underground water
Evaluation of vulnerability classification results, as shown in Figure 3.
RI=RWRR+SWSR+IWIR+VWVR+LWLRFormula (2)
Each index grade classification and assignment table in the RSIVL models of table 2
Finally, DRASTIC is examined using the method for inspection of Groundwater Vulnerability evaluation result provided in an embodiment of the present invention
The evaluation result of model, RSIVL models, to verify the applicability for the method for inspection that the present embodiment is provided：
In order to inquire into hierarchical approaches to Groundwater Vulnerability into the influence of figure, equidistantly (abbreviation EI), geometry are chosen herein
Spacing (abbreviation NG), natural step-wise process (abbreviation GI), four kinds of hierarchical approaches of quantile method (abbreviation Q) carry out Groundwater Vulnerability point
Level, as a result as shown in Fig. 4 (a)-Fig. 4 (d).
The NO of area's 24 phreatic water sampled points of the period when a river is at its normal level in 2005 will be studied3- N concentration is used as validation criteria
The result of calculation of the checking index for the Groundwater Vulnerability evaluation result that DRASTIC models and RSIVL models are obtained is shown in Table 3.
Groundwater Vulnerability evaluation result checking indicator-specific statistics table of the table 3 based on overlapped index method
In table 3, ANOVA represents variance analysis, as known from Table 3, the knot that DRASTIC model evaluation Groundwater Vulnerabilities are obtained
Fruit and NO in underground water3The Spearman's correlation coefficient of-N concentration is 0.26, and weak dependency relation is presented in both.Simultaneously in underground water
NO3- N least concentrations and NO3- N maximum concentrations are both present in NO in the relatively low area of Groundwater Vulnerability, and each grade of fragility3- N is dense
Degree is in 32mg/L-35mg/L, and F values are relatively low, thus the obtained Groundwater Vulnerability result of DRASTIC model evaluations in the presence of compared with
Large deviation.
NO in result and underground water that RSIVL model evaluation Groundwater Vulnerabilities are obtained3The coefficient correlation of-N concentration is
0.6698, the degree of correlation than former DRASTIC models improves 0.4098, and medium dependency relation is presented in both.While underground water
Middle NO3- N least concentrations appear in that Groundwater Vulnerability is relatively low or low area, NO3- N maximum concentrations are appeared in Groundwater Vulnerability
Deng, compared with Gao Huogao areas, F values also improve at least one times compared with DRASTIC models, it is taken as that RSIVL models for research area come
Say, it is more more reasonable than DRASTIC model, can preferable image study area Groundwater Vulnerability actual conditions.
The Groundwater Vulnerability determined using different stage divisions NO in underground water3The coefficient correlation of-N concentration is
0.6698, therefore by analyzing NO3- N maximum concentrations and NO3- N least concentrations respectively appear in which subregion, crisp of vulnerability class
The corresponding NO of weak each grade of property3- N mean concentrations and variance analysis F assays judge which kind of classification results is most reasonable.Utilize
RSIVL model Q stage divisions cause NO3- N least concentrations appear in the low area of Groundwater Vulnerability, NO3- N maximum concentrations are appeared in
The high area of Groundwater Vulnerability, is distributed in the NO of 5 grades of Groundwater Vulnerability3- N mean concentration scopes are in 7.34mg/L-
47.22mg/L, it is more reasonable compared to the evaluation result obtained with DRASTIC models, but the medium area of Groundwater Vulnerability
NO3- N concentration is only 9.31mg/L, relatively more abnormal.The underground water obtained using RSIVL models GI and NJ rank division method
Evaluation of vulnerability result precision is approximate, is totally better than the Groundwater Vulnerability evaluation result that Q stage divisions are obtained, wherein, NO3-N
Least concentration appears in the relatively low area of Groundwater Vulnerability, NO3- N maximum concentrations appear in the higher area of Groundwater Vulnerability, and underground
NO in each grade of water fragility3The trend that grows steadily is presented in-N concentration, and F values are highests in all evaluation models, therefore
Think that evaluation result is reasonable.
It is more effective in order to distinguish GI and NJ which kind of rank division method, judged using rank difference.By NO in underground water3-N
Concentration and Groundwater Vulnerability evaluation result are divided into 5 grades, calculate the absolute value of rank difference.This paper is thought to work as rank
When poor absolute value is 0,1, Evaluation of vulnerability result is reasonable.When fragility is superior to concentration rank 2-3, it is believed that too high to have estimated
Evaluation of vulnerability result；Optionally greater than 4, it is believed that completely too high to have estimated fragility result.Two kinds of rank division methods of GI and NJ
Obtained rank difference is shown in Fig. 5 (a), Fig. 5 (b) and table 4.
The Groundwater Vulnerability evaluation result analysis on its rationality table that the GI and NJ rank division methods of table 4 are obtained
As can be seen that the Groundwater Vulnerability evaluation knot that GI rank division methods are obtained from Fig. 5 (a), Fig. 5 (b) and table 4
The rational area of fruit accounts for the 64.45% of research area's area, and too high estimation Groundwater Vulnerability evaluates area and accounts for research area's area
The rational area of Groundwater Vulnerability evaluation result that 35.53%, NJ rank division method are obtained accounts for research area's area
52.08%, too high estimation Groundwater Vulnerability evaluates area accounts for research area's area 47.47%, complete too high estimation underground water
The area ratio of fragility result is 0.45%.Seen with reference to qualitative and statistical analysis before, it is believed that use GI rank division methods
The obtained Groundwater Vulnerability result of RSIVL models it is more accurate.The Groundwater Vulnerability result obtained to GI grade classifications
Statistical analysis is carried out, 5 are the results are shown in Table.
Table 5 studies area's Vulnerability of Shallow Groundwater subregion statistical form
The method of inspection of Groundwater Vulnerability evaluation result described in the embodiment of the present invention, by from pollutant maximum concentration
The corresponding pollutant of each grade of frangibility zoning, Groundwater Vulnerability where the frangibility zoning at place and least concentration is put down
Equal concentration, the degree of correlation of Groundwater Quality Evaluation result and Groundwater Vulnerability index, statistic F values, rank difference it is exhausted
To being worth this 5 aspects, underground water Evaluation of vulnerability result is carried out Comprehensive Comparison to examine Groundwater Vulnerability evaluation knot
The validity and reliability of fruit.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of method of inspection of Groundwater Vulnerability evaluation result, it is characterised in that including：
A), the Groundwater Vulnerability evaluation result obtained for Groundwater Vulnerability Assessment Method, determines pollutant maximum concentration
Frangibility zoning where the frangibility zoning at place and least concentration；Wherein, the Groundwater Vulnerability evaluation result includes：
Groundwater Vulnerability index and Groundwater Vulnerability grade classification result, the pollutant are certain category feature pollutant；
B), according to underground water vulnerability class division result, determine that the corresponding pollutant of each grade of Groundwater Vulnerability is averaged
Concentration；
C) pollutant concentration and the degree of correlation of Groundwater Vulnerability index, are calculated；
D), by the F check analyses of variance statistic, statistic F values are determined, wherein, F values are bigger, represent under corresponding to differently
Pollutant concentration identical situation in water vulnerability class is fewer；
E), pollutant concentration in underground water and Groundwater Vulnerability evaluation result are divided into the grade of identical quantity, level is calculated
The absolute value of other difference；
D), according to a), b), c), d), e), Comprehensive Comparison is carried out to underground water Evaluation of vulnerability result, evaluation result is assessed
Reliability.
2. the method for inspection of Groundwater Vulnerability evaluation result according to claim 1, it is characterised in that the pollutant
Concentration and the degree of correlation of Groundwater Vulnerability index represent with Spearman rank correlation coefficient, wherein, the Spearman
Coefficient of rank correlation is expressed as：
In formula, ρ represents Spearman rank correlation coefficient, and N is sample size；diRepresent that characteristic contamination is ranked in i-th of sample
It is poor with vulnerability index seniority among brothers and sisters ranking.
3. the method for inspection of Groundwater Vulnerability evaluation result according to claim 1, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to a), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability result,
Obtain pollutant least concentration and appear in the low area of Groundwater Vulnerability or relatively low area, and pollutant maximum concentration appears in underground water
The medium area of fragility, higher area or high area, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
4. the method for inspection of Groundwater Vulnerability evaluation result according to claim 1, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to b), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability result,
The corresponding total quantity control on emission of Groundwater Vulnerability each grade is obtained as the rising of Groundwater Vulnerability grade is presented
The trend of liter, then certain underground water Evaluation of vulnerability result is reasonable described in preliminary judgement.
5. the method for inspection of Groundwater Vulnerability evaluation result according to claim 2, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to c), when underground water Evaluation of vulnerability result is analyzed, Spearman rank correlation coefficient ρ absolute value
It is bigger, represent that the degree of correlation of pollutant concentration and Groundwater Vulnerability index is stronger；
Spearman rank correlation coefficient ρ absolute value is smaller, represents that pollutant concentration is related to Groundwater Vulnerability index
Degree is weaker.
6. the method for inspection of Groundwater Vulnerability evaluation result according to claim 1, it is characterised in that the statistic
F values are expressed as：
In formula, SReturnFor regression sum of square, SIt is residualFor remaining quadratic sum, n is sample content, and k is the quantity of independent variable.
7. the method for inspection of Groundwater Vulnerability evaluation result according to claim 1, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability result,
When the poor absolute value of rank of obtained Groundwater Vulnerability rank and pollutant concentration rank is less than or equal to default first threshold,
Then judge that Groundwater Vulnerability evaluation result is reasonable.
8. the method for inspection of Groundwater Vulnerability evaluation result according to claim 7, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability result,
Difference between obtained Groundwater Vulnerability rank and pollutant concentration rank is more than the default first threshold, and is less than
During equal to default Second Threshold, then judge too high to have estimated certain described underground water Evaluation of vulnerability result.
9. the method for inspection of Groundwater Vulnerability evaluation result according to claim 8, it is characterised in that the basis
A), b), c), d), e), carrying out Comprehensive Comparison to underground water Evaluation of vulnerability result includes：
According to e), when underground water Evaluation of vulnerability result is analyzed, if according to certain underground water Evaluation of vulnerability result,
Difference between obtained Groundwater Vulnerability rank and pollutant concentration rank is more than the default Second Threshold, then judges
It is completely too high to have estimated certain described underground water Evaluation of vulnerability result.
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