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Delineation of Water Sources for Public-Supply Wells in Three Fractured-Bedrock Aquifer Systems in MassachusettsWater-Resources Investigations Report 02-4290By Forest P. Lyford, Carl S. Carlson, and Bruce P. Hansen |
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1. Map showing locations of study areas in Massachusetts
2. Diagram showing source area and contributing area for a discharging well in a simplified hypothetical fractured-bedrock aquifer system: (A) cross-sectional view, and (B) map view
3–7. Maps showing:
3. Location of the West Newbury study area, Knowles and Andreas well sites, selected wells, reported yields from bedrock wells, and stream-gaging stations, West Newbury
4. Wells and stream-gaging stations near the Andreas well site, West Newbury study area
5. Wells and stream-gaging stations near the Knowles well site, West Newbury study area
6. Bedrock geologic units and bedrock surface contours, West Newbury study area
7. Surficial geologic units and locations of geologic cross sections, West Newbury study area
8. Geologic cross sections, West Newbury study area
9. Map showing water levels and estimated potentiometric surface for the bedrock aquifer, December 1999, West Newbury study area
10. Graph showing water levels in wells 96, K8, TW5, 97, 139, and 135, July 1999 to November 2000,West Newbury study area
11, 12. Maps showing:
11. Water levels in selected bedrock observation wells during aquifer testing, West Newbury study area
12. Water levels in selected wells and piezometers near the Andreas well site during aquifer testing, West Newbury study area
13. Logarithmic plots of drawdown with time compared to the Theis type curve for well 96 and well,West Newbury study area
14. Water levels in selected wells and piezometers near the Knowles well site during aquifer testing, West Newbury study area
15. Streamflow hydrographs during aquifer testing, West Newbury study area
16. Graphs showing water levels in U.S. Geological Survey observation wells NIW-27, and HLW-23 during October 1999 to April 2000 and mean water levels for the period of record, Newbury and Haverhill
17. Map showing model features and wells pumped during aquifer testing, West Newbury study area
18. Geohydrologic cross section showing model layers and zones used for model recharge and storage properties, West Newbury study area
19. Graph showing pumping rates during aquifer testing and simulated stress periods, West Newbury study area
20–25. Maps showing:
20. Graphs of simulated heads for model case K and measured heads in wells for aquifer tests, West Newbury study area
21. Simulated contributing areas to wells for model case K and case B conditions, West Newbury study area
22. Drain cells inactivated by pumping for model case K and subbasin boundaries, West Newbury study area
23. Location of the Rockland Avenue study area, observation wells, and stream-gaging stations, Maynard
24. Locations of wells, stream-gaging stations, and bedrock-surface contours near Rockland Avenue, Maynard
25. Surficial geologic units, bedrock outcrops, major faults, and locations of geologic cross sections,Rockland Avenue study area 26.Generalized geologic cross sections A-A¢ and B-B¢, Rockland Avenue study area
27. Map showing potentiometric surface altitude for the bedrock aquifer, March 2000, Rockland Avenue study area
28. Water-level and stage hydrographs for wells MW2 and RW4 and streamflow station MSW1, September 1999 to November 2000, Rockland Avenue study area
29, 30. Maps showing:
29. Water levels in selected observation wells in bedrock during aquifer testing , March 15–31, 2000,Rockland Avenue study are
30. Water levels in selected wells in surficial material and one stream during aquifer testing,March 15–31, 2000, Rockland Avenue study area
31. Logarithmic plot of drawdown with time in well RW1 compared to the Theis type curve, Rockland Avenue study area
32. Graphs showing water levels in U.S. Geological Survey observation wells CTW-167 and ACW-158 during January to May 2000 and mean water levels for the period of record, Acton and Concord
33. Map showing model features and locations of wells pumped during aquifer testing, Rockland Avenue study area
34. Geohydrologic cross section and model layers, Rockland Avenue study area
35. Graph showing observed pumping rates during aquifer testing and simulated stress periods, Rockland Avenue study area
36–40. Maps showing:
36. Graphs of observed and simulated heads at selected wells during aquifer testing for Case L conditions, Rockland Avenue study area
37. Simulated contributing areas to wells for model Cases L and G, Rockland Avenue study area
38. Drain cells inactivated by pumping for model Case L and subbasin boundaries, Rockland Avenue study area
39. Location of the Paxton study area, selected bedrock wells, and stream-gaging stations, Paxton
40.Water-levels in selected piezometers and staff gage, May–December 2001, Paxton study area
41. Bedrock lithologic units, structural features, and ageneralized geologic cross section, Paxton study area
42. Graph showing water level in U.S. Geological Survey observation well HRW-169, January–December 2001, Holden
43. Cross sections showing model layers for the 2-layer and 5-layer models, Paxton study area
44. Map showing model boundaries and zones, Paxton study area
45. Graph showing observed pumping rates during aquifer testing and simulated stress periods, Paxton study area
46–51. Maps showing:
46. Graphs of simulated heads for the 2-layer model and measured heads during aquifer testing,Paxton study area
47. Graphs of simulated heads for the 5-layer model and measured heads during aquifer testing, Paxton study area
48. Simulated contributing areas to wells for the 2-layer model, Paxton study area
49. Simulated contributing areas to wells for the 5-layer model, Paxton study area
50. Drain cells inactivated by pumping from Leicester wells and subbasin boundary, 2-layer model,Paxton study area
51. Drain cells inactivated by pumping from Leicester wells and subbasin boundary, 5-layer model, Paxton study area
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PDF version of report:
title page, table of contents, West Newbury
site; pp. 1 to 39
Maynard
site, pp. 40 to 63
Paxton
site, pp. 63 to 113
The citation for this report, in USGS format, is as follows:
Lyford, F.P., Carlson, C.S. and Hansen, B.P., 2003, Delineation of Water Sources for Public-Supply Wells in Three Fractured-Bedrock Aquifer Systems in Massachusetts: U.S. Geological Survey Water-Resources Investigations Report 02-4290, 114 p.
For more information about USGS activities in Massachusetts-Rhode Island District, visit the USGS Massachusetts-Rhode Island Home Page.
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