| A | B |
|---|
| aquifer | a permeable layer of rock and sediment that contains groundwater |
| unconfined aquifer | aquifer that water can easily flow in and out of |
| confined aquifer | aquifer surrounded by a layer of impermeable rock or clay that impedes water flow |
| water table | layer of water in a given area |
| recharge | process of water percolating though the soil into an aquifer |
| springs | aquifers that naturally percolate water to the surface |
| artesian wells | well created by drilling a hole into a confined aquifer |
| cone of depression | area from which the groundwater has been rapidly with drawn |
| saltwater intrusion | an infiltration of saltwater in an area where groundwater pressure has been reduced from extensive drilling of wells |
| floodplain | an area of water next to a river |
| oligotrophic | a body of water with a low level of productivity and low amount of nutrients |
| mesotrophic | a body of water with moderate amounts of productivity |
| eutrophic | a body of water with high levels of nutrients |
| impermeable surfaces | pavement or building that don't allow water to penetrate |
| levee | enlarged bank built up on each side of a river to prevent flooding |
| dike | a structure built to prevent ocean waters from flooding adjacent land |
| dam | a barrier that runs across a river or stream to control the flow of water |
| resevoir | body of water created by blocking the natural flow of a water way |
| fish ladder | a stair-like structure that allows migrating fish to get around a dam |
| aqueduct | canal or ditch used to carry water from one location to another |
| desalinization | to process of removing salt from salt water |
| hydroponic agriculture | the cultivation of plants in greenhouse conditions by immersing roots in a nutrient rich solution |
