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Subject
- Stream measurements40
- Groundwater27
- Water23
- Water quality20
- Streamflow19
- Flood forecasting18
- Groundwater flow15
- Aquifers13
- River sediments10
- Floods9
- Water-supply8
- Rivers7
- Trace elements7
- Organic compounds6
- Fishes5
- Sediment transport5
- Trace elements in water5
- Contaminated sediments4
- Hydrogeology4
- Stream-gaging stations4