Rivers
río
rivière
ilog
Fluss
100

A sediment carried by a stream that bounces or rolls along the bottom

Bed Load

100

The top of the zone where the ground is completely saturated with water

Water Table

100

Sediment carried within the water of a stream

Suspended Load

100

Flowing water that moves in irregular, swirling patterns

Turbulence 

100

A stream deposit formed where a river enters a lake or ocean

Delta

200

A curved bend in a river or stream

Meander

200

A stream that splits into many smaller channels that weave around sediment bars

Braided Stream

200

A boundary that separates one drainage basin from another

Divide

200

A lake formed when a river meander is cut off from the main stream

Oxbow Lake

200

The entire area drained by a river and its tributaries

Drainage Basin

300

The percentage of open space within soil or rock

Porosity

300

The ability of rock or soil to allow water to pass through it

Permeability

300

A stream that flows into a larger stream or river

Tributary

300

Groundwater that naturally flows out onto the Earth's surface

Spring

300

The process by which water soaks into the ground

Infiltration 

400

Water that flows over the land surface instead of soaking into the ground

Runoff

400

Water flowing smoothly in parallel layers

Laminar

400

A cave formation that hangs from the ceiling

Stalagtite

400

The process where plants release water vapor into the air

Transpiration

400

A flat area next to a river that often floods

Flood Plain

500

The process where water is added back into groundwater supplies

Recharge

500

A cone-shaped deposit of sediment formed where a stream leaves a steep area

Alluvial Fan

500

An underground layer of rock or sediment that holds and moves groundwater

Aquifer 

500

A cave formation that grows upward from the cave floor

Stalagmite

500

Water stored beneath the Earth's surface in soil or rock

Groundwater