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Language: English
Institution
Collection
Format
Subject
384
Water quality
229
Groundwater
223
Stream measurements
215
Hydrogeology
215
Streamflow
182
Water-supply
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175
Aquifers
172
Groundwater flow
170
Water Pollution
161
Groundwater Quality
124
Floods
117
Groundwater Pollution
111
Hydrology
83
Water levels
74
Nutrient pollution of water
62
Groundwater flow Computer simulation
61
Water quality management
60
Water table
58
Water quality Measurement
56
Groundwater recharge
54
Groundwater flow Mathematical models
52
Suspended sediments
48
Sediment transport
45
Water use
42
Water withdrawals
42
Watersheds
41
Geology
40
Flood forecasting
36
Water chemistry
35
Runoff
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Author
1,763
Geological Survey (U.S.),
1,112
Geological Survey (U.S.)
132
National Water-Quality Assessment Program (U.S.)
90
United States. Bureau of Reclamation
87
United States. National Park Service
70
United States. Environmental Protection Agency
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57
United States. Army. Corps of Engineers
52
United States. Bureau of Land Management
50
U.S. Fish and Wildlife Service
34
United States. Federal Emergency Management Agency
32
New York (State). Department of Environmental Conservation
31
United States. Department of Energy
30
Washington (State). Department of Ecology
27
California. State Water Resources Control Board
25
New Jersey. Department of Environmental Protection
24
Massachusetts. Department of Environmental Protection
23
Arkansas Natural Resources Commission
22
Groundwater Resources Program (U.S.)
19
Ground Water Ambient Monitoring and Assessment Program (Calif.)
17
Colorado Water Conservation Board
17
Wisconsin. Department of Natural Resources
15
Southwest Florida Water Management District (Fla.)
15
United States. Forest Service
15
Water Availability and Use Science Program (U.S.)
14
Missouri. Department of Transportation
14
United States. Army. Corps of Engineers,
13
Arizona. Department of Water Resources
13
Huizinga, Richard J.,
13
Oklahoma Water Resources Board
13
Sando, Steven Kent, 1956-
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Language
Genre
52
Maps
19
Conference papers and proceedings
15
Statistics
10
Technical reports
7
Geological maps
5
Periodicals
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4
Electronic government information
3
Bibliographies
3
Databases
3
Guidebooks
2
Bathymetric maps
2
Graphs
2
Handbooks and manuals
2
Relief models
2
Remote-sensing maps
1
Annual reports
1
Atlases
1
Case studies
1
Catalogs
1
Electronic books
1
Government publications
1
Personal correspondence
1
Records (Documents)
1
Records and correspondence
1
Remote-sensing images
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Literary Form
Era
Region
168
United States
139
California
123
Texas
100
Colorado
96
Idaho
95
Washington (State)
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92
New York (State)
76
Oregon
75
Florida
68
Massachusetts
65
Arizona
63
Kansas
58
Arkansas
57
Nevada
54
Hawaii
54
Missouri
53
New Mexico
53
Ohio
52
Wisconsin
51
Indiana
49
Oklahoma
46
New Jersey
45
Alaska
45
Pennsylvania
43
Minnesota
42
Georgia
37
Nebraska
36
Michigan
36
Montana
34
South Dakota
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