1 Eats4400.03 Eats4400.03 GIS and Data Integration GIS and Data Integration GIS and Data Integration GIS and Data Integration GIS and Data Integration GIS and Data Integration GIS and Data Integration GIS and Data Integration Lecture Eight Lecture Eight Lecture Eight Lecture Eight Lecture Eight Lecture Eight Lecture Eight Lecture Eight Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method for for for for for for for for Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Spatial Decision Support Modeling Cheng Cheng Cheng Cheng ESSE ESSE ESSE ESSE Spatial Decision Support System Spatial Decision Support System Spatial Decision Support System Spatial Decision Support System Multiple Map Modeling Multiple Map Modeling Multiple Map Modeling Multiple Map Modeling Decision Theory is concerned with the Decision Theory is concerned with the Decision Theory is concerned with the Decision Theory is concerned with the logic by which one arrives at a choice logic by which one arrives at a choice logic by which one arrives at a choice logic by which one arrives at a choice between alternatives. between alternatives. between alternatives. between alternatives. Alternative Actions Alternative Actions Alternative Actions Alternative Actions Alternative hypotheses Alternative hypotheses Alternative hypotheses Alternative hypotheses Alternative objects Alternative objects Alternative objects Alternative objects so on so on so on so on Potential Applications Potential Applications Potential Applications Potential Applications Potential Applications Potential Applications Potential Applications Potential Applications Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Favorability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) Spatial Decision Support System (SDSS) GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction GIS Data Integration for Prediction Remote Sensing Remote Sensing Remote Sensing Remote Sensing Geological Geological Geological Geological Geochemical Geochemical Geochemical Geochemical Geophysical Geophysical Geophysical Geophysical . . Potential Potential Potential Potential Evidential Layers (X) Evidential Layers (X) Evidential Layers (X) Evidential Layers (X) Modeling Modeling Modeling Modeling (F) (F) (F) (F) Output Data (S) Output Data (S) Output Data (S) Output Data (S) Processing Processing Processing Processing GIS Data GIS Data GIS Data GIS Data Sources Sources Sources Sources Data Data Data Data Preprocessing Preprocessing Preprocessing Preprocessing Interpreting Interpreting Interpreting Interpreting Information Information Information Information Extraction Extraction Extraction Extraction Integration Integration Integration Integration DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS DBMS Geographical Geographical Geographical Geographical General Model General Model General Model General Model General Model General Model General Model General Model n n x w x w x w w S + + + + = ... 2 2 1 1 0 S S S S S S S S – Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing Suitability Suitability Suitability Suitability Suitability Suitability Suitability Suitability Probability Probability Probability Probability Probability Probability Probability Probability x i - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences w i - weights - weights - weights - weights - weights - weights - weights - weights
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Eats4400.03Eats4400.03
GIS and Data IntegrationGIS and Data IntegrationGIS and Data IntegrationGIS and Data IntegrationGIS and Data IntegrationGIS and Data IntegrationGIS and Data IntegrationGIS and Data Integration
Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method Weights of Evidence Method
for for for for for for for for
Spatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support ModelingSpatial Decision Support Modeling
Cheng Cheng Cheng Cheng ESSEESSEESSEESSE Spatial Decision Support System Spatial Decision Support System Spatial Decision Support System Spatial Decision Support System Multiple Map ModelingMultiple Map ModelingMultiple Map ModelingMultiple Map Modeling
Decision Theory is concerned with the Decision Theory is concerned with the Decision Theory is concerned with the Decision Theory is concerned with the logic by which one arrives at a choice logic by which one arrives at a choice logic by which one arrives at a choice logic by which one arrives at a choice between alternatives. between alternatives. between alternatives. between alternatives.
Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Site Selection Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Suitability Assessment Favorability AssessmentFavorability AssessmentFavorability AssessmentFavorability AssessmentFavorability AssessmentFavorability AssessmentFavorability AssessmentFavorability Assessment
Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment Probability Assessment
Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)Spatial Decision Support System (SDSS)GIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for PredictionGIS Data Integration for Prediction
Output Data (S)Output Data (S)Output Data (S)Output Data (S)
ProcessingProcessingProcessingProcessing
GIS Data GIS Data GIS Data GIS Data SourcesSourcesSourcesSources
Data Data Data Data PreprocessingPreprocessingPreprocessingPreprocessingInterpretingInterpretingInterpretingInterpretingInformation Information Information Information ExtractionExtractionExtractionExtraction
IntegrationIntegrationIntegrationIntegration
DBMSDBMSDBMSDBMS
DBMSDBMSDBMSDBMS
DBMSDBMSDBMSDBMS
DBMSDBMSDBMSDBMS
GeographicalGeographicalGeographicalGeographical
General Model General Model General Model General Model General Model General Model General Model General Model
nnxwxwxwwS ++++= ...22110
S S S S S S S S –––––––– Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing Index map showing SuitabilitySuitabilitySuitabilitySuitabilitySuitabilitySuitabilitySuitabilitySuitabilityProbabilityProbabilityProbabilityProbabilityProbabilityProbabilityProbabilityProbability
xxxxxxxxiiiiiiii - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidences - maps or evidenceswwwwwwwwiiiiiiii - weights - weights - weights - weights - weights - weights - weights - weights
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Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Suitability Map for Planning School Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints
1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit
Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Methods for Calculating Weights for Data IntegrationData IntegrationData IntegrationData IntegrationData IntegrationData IntegrationData IntegrationData Integration
Data Driven Methods:Data Driven Methods:Data Driven Methods:Data Driven Methods:Data Driven Methods:Data Driven Methods:Data Driven Methods:Data Driven Methods:Weights of evidenceWeights of evidenceWeights of evidenceWeights of evidenceWeights of evidenceWeights of evidenceWeights of evidenceWeights of evidenceLogistic regressionLogistic regressionLogistic regressionLogistic regressionLogistic regressionLogistic regressionLogistic regressionLogistic regression
Hybrid Methods:Hybrid Methods:Hybrid Methods:Hybrid Methods:Hybrid Methods:Hybrid Methods:Hybrid Methods:Hybrid Methods:Fuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidenceFuzzy weights of evidence
Model Types Model Types Model Types Model Types Model Types Model Types Model Types Model Types
S S S S S S S S –––––––– random variable showing random variable showing random variable showing random variable showing random variable showing random variable showing random variable showing random variable showing probability 0 probability 0 probability 0 probability 0 probability 0 probability 0 probability 0 probability 0 ≤≤≤≤≤≤≤≤ S S S S S S S S ≤≤≤≤≤≤≤≤ 1 with uncertainty1 with uncertainty1 with uncertainty1 with uncertainty1 with uncertainty1 with uncertainty1 with uncertainty1 with uncertainty
S S S S S S S S –––––––– Score 0 Score 0 Score 0 Score 0 Score 0 Score 0 Score 0 Score 0 ≤≤≤≤≤≤≤≤ S S S S S S S S ≤≤≤≤≤≤≤≤ 11111111
Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints Model Constraints
1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit1. Convert maps into comparable unit
⎜⎜⎜⎜⎜⎜⎜⎜⎝⎝⎝⎝
⎛⎛⎛⎛====
enotsuitablabsentnosuitablepresentyes
xi ,,,0,,,1 10...,,2,1====ix
2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %2. Assigning weights for each map as %
Grid calculator with equationGrid calculator with equationGrid calculator with equationGrid calculator with equationGrid calculator with equationGrid calculator with equationGrid calculator with equationGrid calculator with equation
S = 0.50 S = 0.50 S = 0.50 S = 0.50 S = 0.50 S = 0.50 S = 0.50 S = 0.50 rec_siterec_siterec_siterec_siterec_siterec_siterec_siterec_site +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + +0.25 dist_school + 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 0.125rec_landuse + 0.125 rec_sloperec_sloperec_sloperec_sloperec_sloperec_sloperec_sloperec_slope
Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10Map S has values between 1 -10
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More Models for SDSSMore Models for SDSSMore Models for SDSSMore Models for SDSSMore Models for SDSSMore Models for SDSSMore Models for SDSSMore Models for SDSS
Weights of evidence methodWeights of evidence methodWeights of evidence methodWeights of evidence methodWeights of evidence methodWeights of evidence methodWeights of evidence methodWeights of evidence method
nnxwxwxww
PPLog ++++=−
...1 22110
LogisticLogisticLogisticLogisticLogisticLogisticLogisticLogistic --------Model Model Model Model Model Model Model Model
]...|[ 21 nxxxDP
D - point event D - point event D - point event D - point event D - point event D - point event D - point event D - point event P[D] - probability of point event
P[D|...] - conditional probability of D given ...
Spatial analysis of wild animals habitat Spatial analysis of wild animals habitat Spatial analysis of wild animals habitat Spatial analysis of wild animals habitat
In this example, one will investigate the In this example, one will investigate the In this example, one will investigate the In this example, one will investigate the association between wild animal habitat and association between wild animal habitat and association between wild animal habitat and association between wild animal habitat and two types of patterns: 1. treed area, and 2. two types of patterns: 1. treed area, and 2. two types of patterns: 1. treed area, and 2. two types of patterns: 1. treed area, and 2. park. The study is about 100kmpark. The study is about 100kmpark. The study is about 100kmpark. The study is about 100km2222, samples of , samples of , samples of , samples of locations of 10 wild animals were collected locations of 10 wild animals were collected locations of 10 wild animals were collected locations of 10 wild animals were collected using GPS. using GPS. using GPS. using GPS.
We will create a map to show probability of We will create a map to show probability of We will create a map to show probability of We will create a map to show probability of occurrence of wild animals in the area. occurrence of wild animals in the area. occurrence of wild animals in the area. occurrence of wild animals in the area.
5.0)|( =DABP
Probability mappingProbability mappingProbability mappingProbability mapping
not A not B
A not B
not A B
A B
Treed area and park Treed area and park Treed area and park Treed area and park –––– wild animals habitat wild animals habitat wild animals habitat wild animals habitat
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Probability of point event D in an area Probability of point event D in an area Probability of point event D in an area Probability of point event D in an area
P[D]P[D]P[D]P[D] = #of = #of = #of = #of boxes occupied by boxes occupied by boxes occupied by boxes occupied by points/ points/ points/ points/ # of boxes in an # of boxes in an # of boxes in an # of boxes in an areaareaareaarea
Density of points = 10/100 = 0.10Density of points = 10/100 = 0.10Density of points = 10/100 = 0.10Density of points = 10/100 = 0.10 prior probability prior probability prior probability prior probability
Prior probability: total number of point / total area 10/100 = 0.10 (10%) Posterior probability: number of point /pattern area (density of point/area) - P(D|AB)
Concept of Prior probability and Posterior probability
110.40.40.60.6
0.30.30.10.1(0.12)(0.12)
0.20.2(0.18)(0.18)
not Bnot B
0.70.70.30.3(0.28)(0.28)
0.40.4(0.42)(0.42)
BB
not Anot AAA
Percentage of points Percentage of points Percentage of points Percentage of points
P(AB|D) P(notA B|D)
P(A notB|D) P(notA notB|D)
P(B|D)
P(notB|D)
P(notA|D)P(A|D)
marginal probabilitymarginal probabilitymarginal probabilitymarginal probability
Joint probabilityJoint probabilityJoint probabilityJoint probability
Percentage of points of independent eventsPercentage of points of independent eventsPercentage of points of independent eventsPercentage of points of independent events
marginal probabilitymarginal probabilitymarginal probabilitymarginal probabilityJoint probabilityJoint probabilityJoint probabilityJoint probability
Percentage of points on AB = Percentage of points on AB = Percentage of points on AB = Percentage of points on AB = % points on A % points on A % points on A % points on A **** % points on B % points on B % points on B % points on B
5.0)|( =DABP
0.07(0.10)
110.480.480.520.52
0.80.80.350.35(0.38)(0.38)
0.450.45(0.42)(0.42)
not Bnot B
0.20.20.130.13(0.(0.1010))
0.070.07(0.10)(0.10)
BB
not Anot AAA
0.45(0.42)
0.35(0.38)
0.13 (0.10)
not A not B
A not B
not A B
A B
Percentage of Areas Percentage of Areas Percentage of Areas Percentage of Areas
110.480.480.520.52
0.800.800.350.35(0.38)(0.38)
0.450.45(0.42)(0.42)
not Bnot B
0.200.200.130.13(0.(0.1010))
0.0.0707(0.10)(0.10)
BB
not Anot AAA
Percentage of areas Percentage of areas Percentage of areas Percentage of areas
P(AB) P(notA B)
P(A notB) P(notA notB)
P(B)
P(notB)
P(notA)P(A)
marginal probabilitymarginal probabilitymarginal probabilitymarginal probability
Joint probabilityJoint probabilityJoint probabilityJoint probability
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Percentage of areas of independent eventsPercentage of areas of independent eventsPercentage of areas of independent eventsPercentage of areas of independent events
marginal probabilitymarginal probabilitymarginal probabilitymarginal probabilityJoint probabilityJoint probabilityJoint probabilityJoint probability
% Area of AB = % Area of AB = % Area of AB = % Area of AB = % Area of A % Area of A % Area of A % Area of A **** % Area of B % Area of B % Area of B % Area of B
% points on A% points on A% points on A% points on A
% Area of A % Area of A % Area of A % Area of A
WWWWAAAA+ + + + > 0 positive correlation between A and points> 0 positive correlation between A and points> 0 positive correlation between A and points> 0 positive correlation between A and points
WWWWAAAA+ + + + = 0 no correlation between A and points= 0 no correlation between A and points= 0 no correlation between A and points= 0 no correlation between A and points
WWWWAAAA+ + + + < 0 negative correlation between A and points< 0 negative correlation between A and points< 0 negative correlation between A and points< 0 negative correlation between A and points
Spatial Association Index Spatial Association Index Spatial Association Index Spatial Association Index
Contrast Contrast Contrast Contrast
C = WC = WC = WC = WAAAA++++ - W - W - W - WAAAA
----
(1) -(1) -(1) -(1) -∞∞∞∞ < C < < C < < C < < C < ∞∞∞∞
(2) C = 0 A and D are independent(2) C = 0 A and D are independent(2) C = 0 A and D are independent(2) C = 0 A and D are independent
(3) C > 0 positive correlation between D and A(3) C > 0 positive correlation between D and A(3) C > 0 positive correlation between D and A(3) C > 0 positive correlation between D and A
(4) C < 0 negative correlation between D and A(4) C < 0 negative correlation between D and A(4) C < 0 negative correlation between D and A(4) C < 0 negative correlation between D and A
Prediction of Potential Flowing Prediction of Potential Flowing Prediction of Potential Flowing Prediction of Potential Flowing Wells in the ORMWells in the ORMWells in the ORMWells in the ORM
Flowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and SpringsFlowing Wells and Springs Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from ORMORMORMORMORMORMORMORM
Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from Flowing Wells vs. Distance from ORMORMORMORMORMORMORMORM
Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance Flowing Wells vs. Distance From High Slope ZoneFrom High Slope ZoneFrom High Slope ZoneFrom High Slope ZoneFrom High Slope ZoneFrom High Slope ZoneFrom High Slope ZoneFrom High Slope Zone
Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of Flowing Wells vs. Thickness of DriftDriftDriftDriftDriftDriftDriftDrift
Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick DriftDriftDriftDriftDriftDriftDriftDrift
Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick Flowing vs. Distance from Thick DriftDriftDriftDriftDriftDriftDriftDrift
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Potential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing WellsPotential Locations of Flowing Wells by by by by by by by by Weights of Evidence Weights of Evidence Weights of Evidence Weights of Evidence Weights of Evidence Weights of Evidence Weights of Evidence Weights of Evidence (Cheng, 2001) (Cheng, 2001) (Cheng, 2001) (Cheng, 2001) (Cheng, 2001) (Cheng, 2001) (Cheng, 2001) (Cheng, 2001)
ThemeThemeThemeTheme Area Area Area Area %%%% Points%Points%Points%Points% CoCoCoContrastntrastntrastntrast tttt----valuevaluevaluevalue
LR LR LR LR CoeffCoeffCoeffCoeff....
LRLRLRLR StdStdStdStd
Buffer zone Buffer zone Buffer zone Buffer zone (1~1km)(1~1km)(1~1km)(1~1km) aroundaroundaroundaround steep slopesteep slopesteep slopesteep slope 63636363 80808080 0.890.890.890.89 6.546.546.546.54 0.880.880.880.88 0.140.140.140.14 Buffer zone Buffer zone Buffer zone Buffer zone (1~5km) (1~5km) (1~5km) (1~5km) around the ORMaround the ORMaround the ORMaround the ORM 40.340.340.340.3 55.355.355.355.3 0.620.620.620.62 5.685.685.685.68 0.280.280.280.28 0.120.120.120.12 Buffer zone around steep slope of lower sand Buffer zone around steep slope of lower sand Buffer zone around steep slope of lower sand Buffer zone around steep slope of lower sand / gravel t/ gravel t/ gravel t/ gravel top op op op 10.110.110.110.1 52.752.752.752.7 0.620.620.620.62 5.685.685.685.68 1.771.771.771.77 0.120.120.120.12
Ratio of sand/gravel unit cumulative Ratio of sand/gravel unit cumulative Ratio of sand/gravel unit cumulative Ratio of sand/gravel unit cumulative thickness in well depththickness in well depththickness in well depththickness in well depth (6~25%)(6~25%)(6~25%)(6~25%) 43.543.543.543.5 65.165.165.165.1 0.900.900.900.90 7.887.887.887.88 0.490.490.490.49 0.120.120.120.12
Buffer zone Buffer zone Buffer zone Buffer zone (1~2.5km)(1~2.5km)(1~2.5km)(1~2.5km) of thick drift area of thick drift area of thick drift area of thick drift area 16.216.216.216.2 29.329.329.329.3 0.790.790.790.79 6.566.566.566.56 0.450.450.450.45 0.130.130.130.13 Elevation of the upper confined Elevation of the upper confined Elevation of the upper confined Elevation of the upper confined aquaquaquaqu ifersifersifersifers at at at at 356~375356~375356~375356~375 (m a. s. l.) (m a. s. l.) (m a. s. l.) (m a. s. l.) 16.816.816.816.8 38.638.638.638.6 1.181.181.181.18 10.4410.4410.4410.44 0.470.470.470.47 0.130.130.130.13
Elevation of the lower confined aquifers at Elevation of the lower confined aquifers at Elevation of the lower confined aquifers at Elevation of the lower confined aquifers at 311~347311~347311~347311~347 (m a. s. l.)(m a. s. l.)(m a. s. l.)(m a. s. l.) 40.540.540.540.5 58.258.258.258.2 0.730.730.730.73 6.606.606.606.60 0.280.280.280.28 0.130.130.130.13
Steep slope of confined aquifer surfaceSteep slope of confined aquifer surfaceSteep slope of confined aquifer surfaceSteep slope of confined aquifer surface 22.922.922.922.9 54.754.754.754.7 1.451.451.451.45 13.1913.1913.1913.19 0.970.970.970.97 0.120.120.120.12 Buffer zone (Buffer zone (Buffer zone (Buffer zone ( 0~2km) 0~2km) 0~2km) 0~2km) aroundaroundaroundaround the small ponds the small ponds the small ponds the small ponds 61.161.161.161.1 74.974.974.974.9 0.670.670.670.67 5.315.315.315.31 0.430.430.430.43 0.130.130.130.13