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eLibrary > AWWA Manual M21 Groundwater, Fifth Edition >

AWWA Manual M21 Groundwater, Fifth Edition, 2024

Preface
Acknowledgments
Chapter 1
The Occurrence and Behavior of Groundwater
HYDROLOGIC CYCLE
IDENTIFICATION OF SUITABLE GROUNDWATER SUPPLIES
LAND SUBSIDENCE
GROUNDWATER TERMS
REFERENCES
Chapter 2
Wells—Types, Construction, and Use
TYPES OF WELLS AND THEIR CONSTRUCTION
COMMON WELL COMPONENTS
WELL DESIGN PROCEDURE
PUMPS
PUMP SELECTION
OPERATING CONDITIONS
ELECTRIC MOTOR SELECTION
PUMP INSTALLATION
SANITARY PROTECTION
REFERENCES
Chapter 3
Operations—Tracking Data and Identifying Problems
DESIGN AND CONSTRUCTION RECORDS
PUMP DATA
WELL ACCEPTANCE AND PUMPING TEST
EVALUATING WELL PERFORMANCE
WELL MAINTENANCE
WELL ABANDONMENT
WELL LOSSES
SUMMARY
References
Chapter 4
Operations Problems, Well Plugging, and Methods of Correction
EVALUATING WELL PERFORMANCE
POOR WELL PERFORMANCE
COMMON PUMP OPERATING PROBLEMS
PHYSICAL CAUSES OF WELL DETERIORATION
TREATMENT OF CLOGGING AND FOULING PROBLEMS
ECONOMICS OF CLEANING PLUGGED WELLS
CASE STUDIES
SUMMARY
REFERENCES
Chapter 5
Groundwater Quality and Treatment
CHEMICALS IN GROUNDWATER
GROUNDWATER CONTAMINATION
TREATMENT
REFERENCES
BIBLIOGRAPHY
Chapter 6
Conclusion
REFERENCES
Appendix A
Lime Softening Calculation
Figure A-2 Milliequivalent diagram after lime softening
Figure A-1 Milliequivalent diagram
Figure 5-20 Hypochlorite installation
Figure 5-19 Typical chlorine cylinder installation
Figure 5-9 Alkalinity diagram
Figure 5-8 Magnetic ion exchange (MIEX) unit top
Figure 5-7 Ion-exchange tanks
Figure 5-6 Interior of how packed tower works
Figure 5-5 Packed tower
Figure 5-4 Tray aerator—plastic showing major iron deposition
Figure 5-3 Tray aeration—aluminum
Figure 5-2 Flow of contamination from a ponded surface source into an aquifer
Figure 5-1 Nitrogen in drinking water wells in California
Figure 4-8 Changes in bacterial colonies after treatment began in December 1992
Figure 4-7 Venice reverse-osmosis well construction after rehabilitation
Figure 4-6 Example of corroded column pipe
Figure 4-5 Example of well performance history
Figure 4-4 Well efficiency monitoring, Catamount Wellfield, well No. 54
Figure 4-3 Sand separator
Figure 4-2 Centrifugal sand sampler
Figure 3-10 Long-term water pumping report
Figure 3-9 Long-term water quality tracking chart (arsenic)
Figure 3-8 Long-term water-level tracking chart for a monitoring well (MW)
Figure 3-7 Certified flow meter test record
Figure 3-6(a) and (b) Record of well development
Figure 3-5(a), (b), and (c) Record of well drilling, construction, and completion
Figure 3-4(a), (b) and (c) Well and site inventory form (Continued)
Figure 3-3 Water-level data report to monitor changes to long-term sustainability
Figure 3-2 Specific capacity monitoring
Figure 3-1 Graph and schematic illustrating seasonal differences in the quality of water from a public-supply well in California. Review of historic water quality data helped draw attention to the way in which the wellbore itself functioned as a preferent
Figure 2-16 Jet-type deep-well pump
Figure 2-15 Airlift pump: (A) bottom inlet; (B) side inlet; (C) casing inlet
Figure 2-14 Plunger-type pump
Figure 2-13 Rotary-displacement pump
Figure 2-12 Submersible pump
Figure 2-11 Vertical deep-well turbine pump (like Figure 2-10)
Figure 2-10 Multistage centrifugal pumps
Figure 2-9 Volute-type centrifugal pumps
Figure 2-8 Schematic illustrating total static head
Figure 2-7 Example of well screen with stabilizers
Figure 2-6 Screen slot size
Figure 2-5 Two phases of gravel-wall well construction—gravel envelope method
Figure 2-4 Details of a radial well
Figure 2-3 Example of a mud pit
Figure 2-2 Hollow stem drill pipe
Figure 2-1 Example of drill rig with rotary bit
Figure 1-9 Development of a cone of depression
Figure 1-8 Groundwater movement as it relates to topography
Figure 1-7 Geologic configuration of aquifers and confining beds
Figure 1-6 Water movement below the earth’s surface
Figure 1-5 Extreme one-day precipitation events in the contiguous 48 states, 1910–2020
Figure 1-4(b) Annual precipitation normal (1991–2020)
Figure 1-4(a) Annual mean temperature normal (1991-2020)
Figure 1-3 A comparison of evapotranspiration (ET) rates and rainfall in South Florida
Figure 1-2 Annual average evapotranspiration (ET) rates across the continental United States, 2000–2013
Figure 1-1 Hydrologic cycle
Table 2-1 Velocity-head data
Table 2-2 Friction loss for water in ft per 100 ft (Schedule 40 Steel Pipe)
Table 2-3 Equivalent length of new straight pipe for valves and fittings for turbulent flow only
Table 3-1 Framework for identifying redox conditions of groundwater from a well*
Table 4-1 Virus of concern summary
Table 4-2 Fictitious example of replacement versus rehabilitation
Table 4-3 Treatments in well No. 1 summary
Table 4-4 Well No. 2 results
Table 5-1 The most representative natural chemical constituents in water, concentrations, and effects on the usability or limitations of the water
Table 5-2 Water hardness scale
Table 5-3 Federal USEPA Primary Drinking Water Regulations (NPDWRs)
Table 5-4 Regulated pesticides detected in groundwater
Table 5-5 Categories of pharmaceutically active substances (PAS)
Table 5-6 Major sources of groundwater contamination [Go to Page]

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