C

CALF, 58

Calibration, 78, 79

California, 14, 28, 152, 153.

See also San Joaquin Valley

Cape Cod, Massachusetts, 9, 28, 35, 139-144, 165-166

Cartography. See Geographic information systems;

Maps and mapping;

Resolution;

Scales and scaling

Case studies

ground water vulnerability index for pesticides (GWVIP), 162-165

Cape cod, 139-144

Florida, 145-151

Hawaii, 156-161

Iowa, 135-138

San Joaquin Valley, 151-155

Cells and polygons, 7, 65, 67, 87, 91

and geostatistical methods, 62

in GIS databases, 87, 90

in land use and cover mapping, 127

in processed-based models, 59

in soil mapping, 10, 113, 177

Censored data, 60

Centralized Database System (CDBS), 125-126

Chemical databases, 10, 176

Chemigation, 18, 21

Circular A-16, 106, 108

Clay in soils, 2, 42-43, 90

and sampling, 85

Cleanup and control of contamination, 4, 14, 31, 34

Climate, databases, 9, 91, 123-126, 182

Climatic Data Access Facility, 125-126

Cluster analysis, 60, 61

CMLS, 54, 56, 57, 58

Compliance monitoring, 34

Computers and computing, 22, 39, 40

environments, 7-8, 86-87

errors in, 8, 66, 96

see also Geographic information systems;

Process-based simulation models

Concentrations of contaminants, 7, 19, 80

regulatory limits, 34

and sampling methods, 85-86

and statistical methods, 6, 45

Conceptual errors, 66

Conditions on site use, 34

Confidence intervals, and map cells, 7, 67, 77-78

Confinement over aquifers, 43, 48

Contaminant pathways. See Flow paths

Coordination among programs, 5, 39, 40

Federal, 105-108, 124

GIS facilitation of, 94

State and local, 108-109

weather data, 124-125

Counterintuitive situations, 11, 179

County assessments, 23, 37

soil databases, 90, 113

Coupled transport models, 6, 45, 53

Cracks, 3, 18, 21, 94

Cross-contamination, 22

D

Data Base Analyzer and Parameter Estimator (DBAPE), 90-91

Data collection activity, 7, 9, 27, 38, 40, 65, 105

federal, 9, 105-108

remote sensing, 112, 132

of states, 9, 108

see also Monitoring activities and data

Data quality and availability, 2-3, 4-5, 8, 9, 26, 27, 90

and method selection, 37-38

and overlay and index methods, 5-6, 38, 48, 50, 51, 52

and process-based models, 6, 27, 37-38, 53, 56, 94, 105

processing and storage errors, 7, 66

and statistical methods, 6, 38, 45, 60, 63

uncertainties and errors, 3, 7, 20, 38, 63-66, 76-77, 104-105

see also Data collection activity;

Databases;

Monitoring activities and data

Front Matter (R1-R16)

Executive Summary (1-12)

1 Introduction (13-29)

2 Considerations in the Selection and Use of Vulnerability Assessments (30-41)

3 Approaches to Vulnerability Assessments (42-103)

4 Data and Databases (104-134)

5 Case Studies (135-169)

6 Conclusions and Recommendations (170-180)

Appendix A (181-184)

Appendix B (185-188)

Appendix C (189-192)

Index (193-210)