Subject
Hydrogeology
35
Groundwater
12
Aquifers
7
Hydrology
4
Colorado River Watershed (Colo.-Mexico)
3
Groundwater flow
3
Water quality
3
Water-supply
3
Aggregate industry Environmental aspects
2
Alamosa River (Colo.)
2
Mines and mineral resources Environmental aspects
2
Terrace Reservoir (Colo.)
2
Water
2
Water table
2
Aerial photography in hydrogeology
1
Aerial surveys
1
Coal mines and mining Environmental aspects
1
Drill cores
1
Geology, Stratigraphic
1
Geomagnetism Remote sensing
1
Geophysical surveys
1
Geophysical well logging
1
Grand Canyon (Ariz.) Environmental conditions
1
Groundwater Pollution
1
Groundwater flow Computer simulation
1
Groundwater flow Mathematical models
1
Hydrogeology Remote sensing
1
Landsat satellites
1
Lignite
1
Mine drainage
1
Monitoring wells
1
Remote sensing
1
Salinity
1
San Luis Valley (Colo. and N.M.) Environmental conditions Remote sensing
1
Sediments (Geology)
1
Streamflow
1
Uranium mines and mining
1
Uranium ores
1
Water chemistry
1
Water salinization
1