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Subject
- Stream measurements24
- Streamflow[remove]24
- United States Geological Survey Water-supply Paper21
- Rivers, creeks, streams, etc20
- Watersheds20
- Water and water supply17
- Basins (Geology)3
- Runoff3
- Artesian wells2
- Geological surveys2
- Groundwater and aquifers2
- Hydrographic surveying2
- Irrigation2
- Water quality2
- Wells2
- Agriculture1
- Floods1
- Geology1
- Hydrology1
- Lakes1