| 1 |
Types of water |
| 2 |
How we use water |
| 3 |
Measuring and monitoring water |
| 4 |
Aquatic biology and ecosystems |
| 5 |
Common water ıssues |
| 6 |
Essential tools and products |
| 7 |
Advanced capabilities and research |
| 8 |
Advanced monitoring |
| 9 |
Agriculture, livestock, and aquaculture |
| 10 |
Climate variability |
| 11 |
Clouds, precipitation, and atmospheric deposition |
| 12 |
Contaminant transport modeling |
| 13 |
Data science |
| 14 |
Drinkability |
| 15 |
Drinking and household use |
| 16 |
Ecosystem functions and processes |
| 17 |
Ecosystem health |
| 18 |
Emerging contaminants |
| 19 |
Energy production |
| 20 |
Erosion and sedimentation |
| 21 |
Estuarine ecosystems |
| 22 |
Evapotranspiration |
| 23 |
Extreme hydrologic event monitoring |
| 24 |
Groundwater monitoring |
| 25 |
Groundwater, aquifers, wells, and springs |
| 26 |
Groundwater/surface-water ınteractions |
| 27 |
Hazard and event monitoring |
| 28 |
Hazards (floods, droughts, hurricanes, etc.) |
| 29 |
ındustry and mining |
| 30 |
ınstream use and environmental flows |
| 31 |
ınvasive species |
| 32 |
Karst, sinkholes, and land subsidence |
| 33 |
Lake and wetland ecosystems |
| 34 |
Lakes and reservoirs |
| 35 |
Land-use change |
| 36 |
Mapping water |
| 37 |
Microbiology |
| 38 |
National water census |
| 39 |
Nutrients and eutrophication (harmful algal blooms, fish kills, etc.) |
| 40 |
Oceans, estuaries, deltas, and coasts |
| 41 |
Physical habitats and environmental flows |
| 42 |
Plant and animal communities |
| 43 |
Pollution (chemical and biological) |
| 44 |
Prediction and modeling |
| 45 |
Real-time measurements |
| 46 |
Recreation and tourism |
| 47 |
Remote sensing |
| 48 |
Sea-level change |
| 49 |
Snow, ıce, and glaciers |
| 50 |
Soil moisture and permafrost |
| 51 |
Stormwater |
| 52 |
Stream and riverine ecosystems |
| 53 |
Streamgaging network |
| 54 |
Streams and rivers |
| 55 |
Techniques and methods |
| 56 |
Transportation |
| 57 |
Urban water concerns |
| 58 |
Usgs labs and facilities |
| 59 |
Wastewater |
| 60 |
Water availability and use |
| 61 |
Water quality |
| 62 |
Water supply and demand |
| 63 |
Water temperature and thermal stress |
| 64 |
Wetlands |