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CONTENTS

Authors

Foreword

Contents

List of Illustrations

List of Tables

Glossary and Abbreviations

Disclaimer

Abstract

Introduction

Background

Previous Investigation

Description of the Present-Day (1998) Water-Distribution System

External Expert Review

Specific Data Needs

Distribution-System Network Configurations

Production Data

Estimation and Distribution of Historical Consumption

Estimation of Historic Consumption

Distribution of Historic Consumption

High-Service and Booster Pump-Characteristic Curves

System Operations

Groundwater Wells

High-Service and Booster Pumps

Storage Tank and Water-Level Data

Data Availability, Quality, Methods, and Sources

Methods of Analysis and Approaches to Simulation

Overview

Hydraulic Modeling

Representation of Wells, Storage Tanks, and High-Service and Booster Pumps

Manual Adjustment Process

Genetic Algorithm (GA) Optimization

Water-Quality Modeling (Source-Trace Analysis)

Historical Reconstruction Analysis

Proportionate Contribution Results

Summary of Analyses

Review of Simulation Results for Selected Years and Months

1962桭ebruary, May, and October

1965桭ebruary, June, and October

1971桭ebruary, July, and October

1978桭ebruary, June, and October

1988桭ebruary, July, and October

1995桭ebruary, August, and October

1996桭ebruary, June, and October

Sensitivity Analysis

Overview

Variation of Operational and Hydraulic Constraints

Well- and Supply-Node-Pattern Factors

Minimum Pressure Criteria

Storage tank and Water-Level Difference Criteria

Daily System Operations

Results of Sensitivity Analyses

Genetic Algorithm (GA) Optimization Simulations

Daily System Operations Simulations

Summary and Findings

Availability of Model Input Data and Proportionate Contribution Results Files

Acknowledgments

References

Supplemental Data

[Supplemental Data are under separate cover]

Appendix A: Tables of water-distribution system pipeline characteristics, Dover Township area, New Jersey, 1962�

Appendix B: Tables of water-distribution system groundwater-well production and operating data, Dover Township area, New Jersey,1962�

Appendix C: Tables of water-distribution system operations used in EPANET 2, Dover Township area, New Jersey, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix D: Tables of groundwater-well and high-service and booster pump operations, Dover Township area, New Jersey, minimum-, maximum-, and average-demand months, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix E: Reconstruction of hydraulic management of a water-distribution system using genetic algorithms, by M.M. Aral, J. Guan, M.L. Maslia, and J.B. Sautner

Appendix F: Tables of wells and well fields (points of entry) and EPANET 2 source-node identifications used to conduct monthly source-trace analyses, Dover Township area, New Jersey, 1962�

Appendix G: Tables of simulated proportionate contribution of water derived using the manual adjustment process, Dover Township area, New Jersey, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix H: Graphs of simulated proportionate contribution of water derived using the manual adjustment process, Dover Township area, New Jersey, minimum-, maximum-, and average-demand months, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix I: Tables of simulated proportionate contribution of water derived using genetic algorithm (GA) methods, sensitivity analyses SENS0, Dover Township area, New Jersey, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix J: Graphs of simulated proportionate contribution of water derived using genetic algorithm (GA) methods, sensitivity analyses SENS0, Dover Township area, New Jersey, minimum-, maximum, and average-demand months, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

Appendix K: Tables of absolute difference in simulated proportionate contribution of water between the manual adjustment process and genetic algorithm (GA) methods for sensitivity analyses SENS0, Dover Township area, New Jersey, 1962, 1965, 1971, 1978, 1988, 1995, and 1996

LIST OF ILLUSTRATIONS

[Plates are under separate cover]

Plates 1� Maps showing:

1. Location of area of investigation, Dover Township area, Ocean County, New Jersey - PDF

2. Present-day (1998) water-distribution system serving the Dover Township area,New Jersey - PDF

Plates 3�. Maps showing water-distribution system serving the Dover Township area, New Jersey

3. 1962 - PDF

4. 1963 - PDF

5. 1964 - PDF

6. 1965 - PDF

7. 1966 - PDF

8. 1967 - PDF

9. 1968 - PDF

10. 1969 - PDF

11. 1970 - PDF

12. 1971 - PDF

13. 1972 - PDF

14. 1973 - PDF

15. 1974 - PDF

16. 1975 - PDF

17. 1976 - PDF

18. 1977 - PDF

19. 1978 - PDF

20. 1979 - PDF

21. 1980 - PDF

22. 1981 - PDF

23. 1982 - PDF

24. 1983 - PDF

25. 1984 - PDF

26. 1985 - PDF

27. 1986 - PDF

28. 1987 - PDF

29. 1988 - PDF

30. 1989 - PDF

31. 1990 - PDF

32. 1991 - PDF

33. 1992 - PDF

34. 1993 - PDF

35. 1994 - PDF

36. 1995 - PDF

37. 1996 - PDF

Plates 38�. Aerial photographs:

38. CNC-2DD-44 showing residences and buildings serviced by the water-distribution system, central Dover Township area, New Jersey, June 1963 - PDF

39. CNC-1DD-266 showing residences and buildings serviced by the water-distribution system, west-central Dover Township area, New Jersey, June 1963 - PDF

40. 1486-9-424 showing residences and buildings serviced by the water-distribution system, central Dover Township area, New Jersey, April 1965 - PDF

41. 1486-10-144 showing residences and buildings serviced by the water-distribution system, northeastern Dover Township area, New Jersey, April 1965 - PDF

42. CGG-253 showing residences and buildings serviced by the water-distribution system, southwest Dover Township area, New Jersey, April 1968 - PDF

43. DSG-63 showing residences and buildings serviced by the water-distribution system, northern Dover Township area, New Jersey, April 1972 - PDF

44. 2111-18-659 showing residences and buildings serviced by the water-distribution system, northwestern Dover Township area, New Jersey, March 1976 - PDF

45. 2111-19-626 showing residences and buildings serviced by the water-distribution system, western Dover Township area, New Jersey, March 1976 - PDF

Plates 46�. Maps showing areal distribution of land-use classification assigned to pipeline nodes:

46. 1998 water-distribution system, Dover Township area, New Jersey - PDF

47. 1996 water-distribution system, Dover Township area, New Jersey - PDF

48. 1990 water-distribution system, Dover Township area, New Jersey - PDF

49. 1978 water-distribution system, Dover Township area, New Jersey - PDF

50. 1967 water-distribution system, Dover Township area, New Jersey - PDF

51. 1962 water-distribution system, Dover Township area, New Jersey - PDF

Plates 52�3. Maps showing areal disstribution of simulated proportionate contribution of water from the:

52. Holly wells (13, 14) to locations in the Dover Township area, New Jersey, February 1962 conditions - PDF

53. Brookside well (15) to locations in the Dover Township area, New Jersey, February 1962 conditions - PDF

54. Holly wells (13, 14) to locations in the Dover Township area, New Jersey, May 1962 conditions - PDF

55. Brookside well (15) to locations in the Dover Township area, New Jersey, May 1962 conditions - PDF

56. Holly wells (13, 14) to locations in the Dover Township area, New Jersey, October 1962 conditions - PDF

57. Brookside well (15) to locations in the Dover Township area, New Jersey, October 1962 conditions - PDF

58. Holly well (16) to locations in the Dover Township area, New Jersey, February 1965 conditions - PDF

59. Brookside well (15) to locations in the Dover Township area, New Jersey, February 1965 conditions - PDF

60. Holly wells (14, 16, 18) to locations in the Dover Township area, New Jersey, June 1965 conditions - PDF

61. Brookside well (15) to locations in the Dover Township area, New Jersey, June 1965 conditions - PDF

62. Holly wells (14, 16, 18) to locations in the Dover Township area, New Jersey, October 1965 conditions - PDF

63. Brookside well (15) to locations in the Dover Township area, New Jersey, October 1965 conditions - PDF

64. Holly wells (16, 18, 19) to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

65. Brookside well (15) to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

66. South Toms River well (17) to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

67. Indian Head well (20) to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

68. Anchorage well to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

69. Silver Bay well to locations in the Dover Township area, New Jersey, February 1971 conditions - PDF

70. Holly wells (14, 16, 18, 19, 21) to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

71. Brookside well (15) to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

72. South Toms River well (17) to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

73. Indian Head well (20) to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

74. Parkway wells (22, 23, 26, 27) to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

75. Anchorage well to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

76. Silver Bay well to locations in the Dover Township area, New Jersey, July 1971 conditions - PDF

77. Holly wells (16, 18, 19) to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

78. Brookside well (15) to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

79. South Toms River well (17) to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

80. Indian Head well (20) to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

81. Anchorage well to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

82. Silver Bay well to locations in the Dover Township area, New Jersey, October 1971 conditions - PDF

83. Holly wells (16, 18) to locations in the Dover Township area, New Jersey, February 1978 conditions - PDF

84. South Toms River well (17) to locations in the Dover Township area, New Jersey, February 1978 conditions - PDF

85. Indian Head well (20) to locations in the Dover Township area, New Jersey, February 1978 conditions - PDF

86. Parkway wells (22, 24, 26, 28, 29) to locations in the Dover Township area, New Jersey, February 1978 conditions - PDF

87. Holly wells (16, 18, 19, 21) to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

88. Brookside well (15) to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

89. South Toms River well (17) to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

90. Indian Head well (20) to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

91. Parkway wells (22, 23, 24, 25, 26, 27, 28, 29) to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

92. Anchorage well to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

93. Silver Bay well to locations in the Dover Township area, New Jersey, June 1978 conditions - PDF

94. Holly wells (16, 18, 19) to locations in the Dover Township area, New Jersey, October 1978 conditions - PDF

95. Brookside well (15) to locations in the Dover Township area, New Jersey, October 1978 conditions - PDF

96. South Toms River well (17) to locations in the Dover Township area, New Jersey, October 1978 conditions - PDF

97. Indian Head well (20) to locations in the Dover Township area, New Jersey, October 1978 conditions - PDF

98. Parkway wells (24, 26, 28, 29) to locations in the Dover Township area, New Jersey, October 1978 conditions - PDF

99. Holly well (30) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

100. Brookside well (15) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

101. South Toms River well (32) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

102 Parkway wells (22, 24) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

103. Route 70 well (31) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

104. Berkeley wells (33, 34) to locations in the Dover Township area, New Jersey, February 1988 conditions - PDF

105. Holly wells (21, 30) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

106. Brookside well (15) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

107. South Toms River wells (32, 38) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

108. Indian Head well (20) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

109. Parkway wells (22, 23, 24, 26, 28, 29) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

110. Route 70 well (31)to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

111. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, July 1988 conditions - PDF

112. Holly well (30) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

113. South Toms River well (32) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

114. Indian Head well (20) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

115. Parkway wells (22, 23, 24, 26, 28, 29) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

116. Route 70 well (31) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

117. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, October 1988 conditions - PDF

118. South Toms River well (32) to locations in the Dover Township area, New Jersey, February 1995 conditions - PDF

119. Indian Head well (20) to locations in the Dover Township area, New Jersey, February 1995 conditions - PDF

120. Parkway wells (22, 24, 28, 29, 42) to locations in the Dover Township area, New Jersey, February 1995 conditions - PDF

121. Route 70 well (31) to locations in the Dover Township area, New Jersey, February 1995 conditions - PDF

122. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, February 1995 conditions - PDF

123. Holly wells (21, 30, 37) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

124. Brookside well (15) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

125. South Toms River wells (32, 38) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

126. Indian Head well (20) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

127. Parkway wells (22, 24, 26, 28, 29, 39, 41, 42) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

128. Route 70 well (31) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

129. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

130. Windsor well (40) to locations in the Dover Township area, New Jersey, August 1995 conditions - PDF

131. Holly well (30) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

132. Indian Head well (20) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

133. Parkway wells (22, 24, 26, 28, 29, 42) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

134. Route 70 well (31) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

135. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

136. Windsor well (40) to locations in the Dover Township area, New Jersey, October 1995 conditions - PDF

137. South Toms River well (32) to locations in the Dover Township area, New Jersey, February 1996 conditions - PDF

138. Indian Head well (20) to locations in the Dover Township area, New Jersey, February 1996 conditions - PDF

139. Parkway wells (22, 24, 26, 28, 29, 42) to locations in the Dover Township area, New Jersey, February 1996 conditions - PDF

140. Route 70 well (31) to locations in the Dover Township area, New Jersey, February 1996 conditions - PDF

141. Berkeley wells (33, 34) to locations in the Dover Township area, New Jersey, February 1996 conditions - PDF

142. Holly well (30) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

143. Brookside well (15) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

144. South Toms River wells (32, 38) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

145. Parkway wells (22, 24, 26,28, 29, 42) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

146. Route 70 well (31) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

147. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

148. Windsor well (40) to locations in the Dover Township area, New Jersey, June 1996 conditions - PDF

149. Holly well (30) to locations in the Dover Township area, New Jersey, October 1996 conditions - PDF

150. South Toms River well (32) to locations in the Dover Township area, New Jersey, October 1996 conditions - PDF

151. Parkway wells (22, 24, 26, 28, 29, 42) to locations in the Dover Township area, New Jersey, October 1996 conditions - PDF

152. Route 70 well (31) to locations in the Dover Township area, New Jersey, October 1996 conditions - PDF

153. Berkeley wells (33, 34, 35) to locations in the Dover Township area, New Jersey, October 1996 conditions - PDF

Figure 1. Map showing investigation area, Dover Township, Ocean County, New Jersey

2. Diagram showing key steps in the historical reconstruction analysis

3. Map showing water-distribution system serving the Dover Township area, New Jersey, 1998

4. Graphs showing diurnal water use for 1998: (A) winter-time demand, and (B) summer-time demand

Figures 5� Maps showing water-distribution system serving the Dover Township area, New Jersey:

5. 1962

6. 1971

7. 1988

8. 1996

Figures 9�. Graphs showing:

9. Percentage of network pipeline material type by year, Dover Township area, New Jersey, 1962�

10. Total network pipeline length and total customers served, Dover Township area, New Jersey, 1962�

11. Minimum, mean, and maximum annual production of water, Dover Township area, New Jersey, 1962�

Figure 12. Plot showing three-dimensional representation of monthly production of water, Dover Township area, New Jersey, 1962�

13. Graph showing groundwater-well capacity, Dover Township area, New Jersey, 1962�

14. Charts showing annual production of water by well or well field, Dover Township area, New Jersey, 1962�

Figures 15�. Diagrams showing:

15. Hypothetical present-day network with spatial distribution of demand and production

16. Historical Network (A) with spatial distribution of demand and production

17. Historical Network (B) with spatial distribution of demand and production

Figure 18. Graph showing storage-tank capacity, Dover Township area, New Jersey, 1962�

19. Diagram showing distribution system representation of groundwater well, storage tank, and high-service and booster pump combination for (A) physical, "real-world" network, and (B) model network used for historical reconstruction analysis

20. Graphs showing measured and simulated flows using the Well-Storage Tank-Pump (WSTP) and Supply-Node-Link (SNL) simulation methods, Dover Township area, New Jersey, August 1998 at (A) Holly treatment plant, and (B) Parkway treatment plant

Figure 21. Map showing areal distribution of simulated proportionate contribution of water from the Parkway wells (22, 23, 24, 26, 28, 29) to locations in the Dover Township area, New Jersey, July 1988 conditions (manual adjustment process)

22. Graph showing simulated proportionate contribution of water from wells and well fields to selected locations, Dover Township area, New Jersey, July 1988 (manual adjustment process)

Figures 23�. Graphs showing annual variation of simulated proportionate contribution of water from wells and well fields to selected locations, Dover Township area, New Jersey

23. Minimum-demand months, 1962� (manual adjustment process)

24. Maximum-demand months, 1962� (manual adjustment process)

25. Average-demand months, 1962� (manual adjustment process)

26. Map showing areal distribution of simulated proportionate contribution of water from the Parkway wells (22, 23, 24, 26, 28, 29) to locations in the Dover township area, New Jersey, July 1988 conditions (sensitivity analyses SENS0)

Figures 27�. Graphs showing:

27. Simulated proportionate contribution of water derived from the manual adjustment process and Genetic Algorithm (GA) optimization simulation SENS0 for selected pipeline locations, Dover Township area, New Jersey, February, July, and October 1988

28. Pattern factors derived using the manual adjustment process and sensitivity analyses SENS0, supply nodes represent Parkway well 23 and Parkway well 24, July 1988 conditions

29. Pattern factors derived using the manual adjustment process and sensitivity analysis SENS1, supply node represents Parkway well 26, minimum-, maximum-, and average-demand months, 1978, 1988, and 1996

30. Pattern factors derived using the manual adjustment process and the sensitivity analyses, supply node represents Parkway well 22, October 1996 conditions

31. Differences in proportionate contributions of water derived from sensititivy analyses maximum-, minimum-, and average-demand months, 1971, 1978, 1988, and, 1996

32. Histograms of differences in proportionate contribution of water derived using the manual simulation approach sensitivity analyses maximum-, minimum-, and average-demand months, 1971, 1978, 1988, and 1996

33. Results for simulated proportionate contribution of water from wells and well fields to selected pipeline locations using day- and month-long simulations, minimum-, maximum-, and average-demand months, 1996 (manual adjustment process)

LIST OF TABLES

Table 1. Water-distribution system configuration, Dover Township area, New Jersey, 1962�

2. Type of water treatment used by the present-day (1998) water-distribution system, Dover Township area, New Jersey

3. Land-use classification analysis for present-day (1998) and historical pipeline networks, Dover Township, New Jersey

4. "Master Operating Criteria" used to develop operating schedules for the historical waterdistribution system, Dover Township area, New Jersey

Tables 5� Water-distribution system operating schedule, Dover Township area, New Jersey:

5. May 1962

6. July 1971

7. July 1988

8. June 1996

Table 9. High-service and booster pump data, Dover Township area, New Jersey, 1962� 42

10. Storage-tank characterization data used for historical reconstruction analysis, Dover Township area, New Jersey, 1962�

11. Summary of specific data types used to conduct the historical reconstruction analysis, Dover Township area, New Jersey

12. Data availability and methods of obtaining data for historical reconstruction analysis, Dover Township area, New Jersey

13. Summary of model parameters, data availability, and time-unit variation for historical reconstruction analysis, Dover Township area, New Jersey

14. Production and supply data for a hypothetical distribution system

15. Water supply for a hypothetical distribution system computed using the Supply-Node-Link (SNL) method

16. Comparison of measured high-service pump flows and the Well-Storage Tank-Pump and Supply-Node-Link simulation methods, Dover Township area, New Jersey, August 1998

17. Well or well field (point of entry) for which simulated proportionate contribution results are shown on maps, year and month of analysis, and map identification number

18. Correspondence between pipeline location letters and model node numbers for which simulated proportionate contribution results are discussed in text and shown in figures and on plates

19. Presentation of proportionate contribution results for wells and well fields for selected pipeline locations, year and month of analysis, and location in report, manual adjustment process

20. Description of operational and hydraulic constraints varied for sensitivity analyses

21. Identification of year and month for conducting sensitivity analysis simulations

22. Presentation of proportionate contribution results for wells and well fields for selected pipeline locations using sensitivity analyses SENS0, year, month of analysis, and location in report

23. Statistical summary of differences in simulated proportionate contribution of water between the manual adjustment process and sensitivity analyses

GLOSSARY AND ABBREVIATIONS

Definition of terms and abbrevations used throughout this report are listed below:

Term or Abbreviation

Definition

AC

Asbestos cement water pipeline

ATSDR

Agency for Toxic Substances and Disease Registry

CD-ROM

Computer disc, read only memory

CERCLA

Comprehensive Environmental Response, Compensation, and Liability Act; is also known as Superfund

Consumption

The use of water by customers of a water utility; is also known as demand. In a water-distribution system, consumption should equal production if there are no losses through leaks or pipe breaks

Direct measurement or observation

A method of obtaining data that is based on measuring or observing the parameter of interest.

EPA

U.S. Environmental Protection Agency

EPANET 2

A water-distribution system model developed by the EPA

EPS model

Extended period simulation model; a simulation method used to analyze a water-distribution system that is characterized by time-varying demand and operating conditions

Epidemiologic study

A study to determine whether a relation exists between the occurrence and frequency of a disease and a specific factor such as exposure to a toxic compound found in the environment

ft

Foot (feet)

GA

Genetic Algorithm; a method of optimization that attempts to find the most optimal solution by mimicking the mechanics of natural selection and genetics

GIS

Geographic information system

gal

gallon(s)

gpm

gallon(s) per minute

Historical reconstruction

A diagnostic analysis used to examine the historical characteristics of a water-distribution system

in.

Inch(s)

Link

The representation of a length of pipeline section in EPANET 2

Manual adjustment process

A modeling approach whereby a balanced flow condition is achieved through the repeated modification and refinement of modeling parameters by the analyst

Master Operating Criteria

Guidelines developed for operating a water-distribution system that are based, in part, on hydraulic engineering principles

Maximum-demand month

A time during a prescribed year when water usage is greatest; is also known as a peak- or summer-demand period

MGD

Million gallons per day

Mgal

Million gallons

mi

Mile(s)

Minimum-demand month

A time during a prescribed year when water usage is least; is also known as a low- or winter-demand period

Model node

The representation of the end point of a section of pipeline in EPANET 2; is also known as pipeline junction

NJDHSS

New Jersey Department of Health and Senior Services

NPL

National Priorities List; the EPA抯 official list of hazardous waste sites which are to be cleaned up under the Superfund

Pipeline junction

Representation of the end point of a section of pipeline in EPANET 2; is also known as model node

Point demand

The spatial distribution of total consumption to pipeline or model locations based on measured data such as metered billing records

Point of entry

The location where water enters a water-distribution system from a source such as an aquifer, lake, stream, or river. For the Dover Township area, the points of entry are the wells and well fields

Production

The processing of potable water by a water utility and the delivery of the water to locations serviced by the water-distribution system. In a water-distribution system, production should equal consumption if there are no losses through leaks, pipe breaks, or non-metered water usage.

Proportionate contribution

The derivation of water from one or more sources in differing proportions. The sum of the proportionate contribution at any location in the water-distribution system should equal 100%

PVC, PE, IPS

Types of plastic water pipelines

psi

pounds per square inch

Qualitative description

A method of estimating data that is based on inference or is synthesized using surrogate information

Quantitative estimate

A method of estimating data that based on using computational techniques

SAN

Styrene-acrylonitrile trimer

Sensitivity analysis

A method of characterizing or quantifying uncertainty and variability. This involves conducting a series of model simulations, changing specific parameter or constraint values, and comparing the effect of changed parameter(s) or constraint(s) with reference to a base condition

Source-trace analysis

A method used to identify the source of delivered water using a water-distribution model. A source-trace analysis can be used to track the percentage of water reaching any point in a water-distribution system over time from a specified location or source

SNL

Supply-node-link simulation method

Steady-state model

A simulation method used to analyze a water-distribution system that is characterized by static or non-time-varying demand and operating conditions

SVOC

Semi-volatile organic compound

System operations

The on-and-off cycling of wells and high-service and booster pumps and the operational extremes of water levels in storage tanks over a 24-hour period

TCE

Trichloroethylene

TIGER

Topologically integrated, geographic encoding and referencing system. A database developed by the U.S. Department of Commerce that describes in a digital format the locations of roadways, hydrography, landmarks, places, cities, and geographic census boundaries

UWTR

United Water Toms River, Inc.

VOC

Volatile organic compound

Water-distribution system

A water-conveyance network consisting of hydraulic facilities such as wells, reservoirs, storage tanks, and high-service and booster pumps; and a network of pipelines for delivering potable water

WSTP

Well-Storage Tank-Pump simulation method

DISCLAIMER

Use of trade names and commercial sources is for identification only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry or the U.S. Department of Health and Human Services.

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This page last reviewed on December 5, 2001

Contact Name: Maria Gosa/mjg4@cdc.gov


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