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Rill erosion occurs when runoff water forms small channels as it concentrates down a slope.
rill erosion
A floodplain (or floodplain) is a generally flat area of land next to a river or stream. It stretches from the banks of the river to the outer edges of the valley.
floood plain
a long narrow island lying parallel and close to the mainland, protecting the mainland from erosion and storms.
barrier island
a large underground chamber, typically of natural origin, in a hillside or cliff.
cave
a long, narrow open container for animals to eat or drink out of.
trough
is the removal of soil along drainage lines by surface water runoff. Unless steps are taken to stabilise the disturbance, gullies will continue to move by headward erosion or by slumping of the side walls.
gully erosion
are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. Although very uncommon, deltas can also empty into land. A river moves more slowly as it nears its mouth, or end
delta
water that exists underground in saturated zones beneath the land surface. The upper surface of the saturated zone is called the water table. Contrary to popular belief, groundwater does not form underground rivers.
groundwater
a bowl for washing, typically attached to a wall and having faucets connected to a water supply; a
basin
a heavy sea wave that breaks into white foam on the shore or a shoal.
breaker
detachment of soil particles by raindrop impact and their removal downslope by water flowing overland as a sheet instead of in definite channels or rills
sheet erosion
a triangle-shaped deposit of gravel, sand, and even smaller pieces of sediment, such as silt. This sediment is called alluvium. Alluvial fans are usually created as flowing water interacts with mountains, hills, or the steep walls of canyons.
alluvial fan
of a material or membrane) allowing liquids or gases to pass through it.
permeable
refers to the concentrations of salts in water or soils.
salinity
the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
tide
an area of land where water from rain or snow melt drains downhill into a body of water such as a river, lake, wetland or ocean. The drainage basin includes both the streams and rivers that convey the water as well as the land surface from which water drains into those channels.
drainage basin
sometimes called a cross current, lateral current or Littoral current, flows parallel to the coastline. Everyone who has been in the water at the beach has experienced one.
longershore current
not liable to be affected by pain or distress; insusceptible or imperturbable
impermeable
move one's hand to and fro in greeting or as a signal.
wave
tidel range
is the surface where the water pressure head is equal to the atmospheric pressure
water table
The seasons are defined as spring (March, April, May), summer (June, July, August), autumn
spring
a rare kind of hot spring that is under pressure and erupts, sending jets of water and steam into the air. Geysers are made from a tube-like hole in the Earth's surface that runs deep into the crust. The tube is filled with water.
geyser
a comb or tuft of feathers, fur, or skin on the head of a bird or other animal.
crest
a rising of seawater, magma, or other liquid.
upwelling