Subject
Geology
85
Groundwater
24
Water quality
15
Texas
14
Aquifers
13
Hydrogeology
10
Edwards Aquifer (Tex.)
9
Streamflow
8
Water-supply
7
Folklore
6
Stream measurements
6
Wells
6
Geology, Stratigraphic
5
Floods
4
Groundwater Pollution
4
Hydrology
4
Runoff Mathematical models
4
Tales
4
Water Pollution
4
Football
3
Nutrient pollution of water
3
Pesticides Environmental aspects
3
Water chemistry
3
Flood forecasting
2
Flower Garden Banks National Marine Sanctuary (Tex.)
2
Geology Maps
2
Geomagnetism
2
Geophysical well logging
2
Groundwater flow
2
Groundwater flow Computer simulation
2
Groundwater flow Simulation methods
2
Land use Environmental aspects
2
Marine sediments
2
Natural gas
2
Oil fields
2
Outdoor recreation
2
Petroleum Geology
2
Roads
2
Runoff
2
Saltwater encroachment
2
Stream measurements Mathematical models
2
Streamflow Computer simulation
2
Streamflow Mathematical models
2
Subsidences (Earth movements)
2
Trinity Aquifer (Tex.)
2
Volatile organic compounds Physiological effect
2
Water Analysis
2
Water Dissolved oxygen
2
Water levels
2
Water quality bioassay
2
more ...