Glossary Of Water Terminology

Water is a transparent, inorganic, odorless, and almost colorless substance existing in liquid, solid, or gaseous states, and composed of two chemical elements; oxygen and hydrogen. It contains two hydrogens and one oxygen atom and is represented by the chemical formula H2O. This substance is liquid at room temperature, solid at freezing point, and gaseous at 100 degrees Celsius. Water can dissolve several other substances and is essential for all life forms even though it contains no organic nutrient nor adds any calories to the body.

Water is the 贰补谤迟丑鈥檚 most abundant chemical substance and the main component of the hydrosphere. About 71% of the 贰补谤迟丑鈥檚 surface is covered by water in the form of oceans, seas, lakes, rivers, and streams. Solid water exists in glacier and ice caps, while a small amount also occurs as groundwater. In the atmosphere, water exists as clouds, vapor, and precipitation. When water on the 贰补谤迟丑鈥檚 surface is heated, it evaporates into the atmosphere, where it condenses and falls to the ground again, finding its way to the sea or ocean through surface runoff. This continuous water movement is known as the hydrological cycle.

Water is one of the most studied chemical substances because of its benefits and influence on other substances. As such, numerous terms have been used to describe this important substance, including its nature, processes, interaction, influence, and other related use. Some of these terms also describe its physical and chemical properties, including the associated characteristics and other substances and organisms linked to it. Below is a glossary of water-related terms one is likely to come across.

A

acid:聽a substance that has a pH value between 0 and 7
acid deposition ("acid rain"):聽- water that falls to or condenses on the Earth's surface as rain, drizzle, snow, sleet, hail, dew, frost, or fog with a pH of less than 5.6
acre-foot:聽the amount of water needed to cover one acre of land one foot deep; about 326,000 gallons
adhesion:聽the attraction between molecules that causes matter to cling to or stick to other matter
adjudication:聽a court determination of water rights for a groundwater basin or a stream; adjudication sets priorities during shortages
aeration:聽the addition of air to water or to the pores in soil
aesthetic:聽sensitive to beauty
alkaline:聽the quality of being bitter due to alkaline content (pH is greater than 7)
alluvial:聽sediment deposited by flowing water, such as in a riverbed
alum:聽aluminum sulfate: a chemical, which is mixed into water to cause particles in the water to clump together so they can be removed
anadramous:聽any fish which spends a portion of its life cycle in freshwater and a portion in the sea
aquifer:聽an underground layer of rock, sediment or soil that is filled or saturated with water
aquifer system:聽a heterogeneous body of introduced permeable and less permeable material that acts as a water-yielding hydraulic unit of regional extent
aqueduct:聽man-made canal or pipeline used to transport water

B

bacteria聽- any of a number of one-celled organisms, some of which cause disease
base聽- a substance that has a pH value between 7 and 14
basin聽- a groundwater reservoir defined by the overlying land surface and underlying aquifers that contain water stored in the reservoir
benefit聽- an advantage to be gained in a trade-off
benefit/cost analysis聽- a process of evaluating the advantages and disadvantages of a proposed purchase or project
BMPs (Best Management Practices)聽- structural or management practices which are implemented to reduce pollution (e.g., using a permeable material for parking lots to reduce urban runoff)
boiler scale聽- mineral deposits from water, such as those found inside pipes or teakettles
bond聽- a promise to repay money borrowed, plus interest, over a specified period of time
bond issue聽- a means of raising large amounts of money for major projects by selling bonds
brackish聽- water containing too much salt to be useful to people but less salt than ocean water
by-products聽- something produced in addition to the principal product

C

capillarity聽- the process by which water rises through rock, sediment or soil caused by the cohesion between water molecules and an adhesion between water and other materials that "pulls" the water upward
capital cost聽- all the implements, equipment, machinery and inventory used in the production of goods and services
cesspool聽- a covered hole or pit for receiving sewage
chloramination聽- the treatment of a substance, such as drinking water, with chlorine and ammonia (chloramines) in order to kill disease-causing organisms
chlorination聽- the treatment of a substance, such as drinking water, with chlorine in order to kill disease-causing organisms
cloud聽- a mass of suspended water droplets and/or ice crystals in the atmosphere
cloud droplets聽- the tiny liquid pieces of water that many clouds are made of. When cloud droplets join together and become heavy enough they form raindrops.
coagulation聽- the process, such as in treatment of drinking water, by which dirt and other suspended particles become chemically "stuck together" so they can be removed from water
cohesion聽- the ability of a substance to stick to itself and pull itself together
coliform聽- a group of bacteria used as indicators of microbiological contamination
colloidal suspension聽- a method of sediment transport in which water turbulence (movement) supports the weight of the sediment particles, thereby keeping them from settling out or being deposited
condensation聽- water vapor changing back into liquid
condensation surfaces聽- small particles of matter, such as dust and salt suspended in the atmosphere, which aid the condensation of water vapor in forming clouds
confined aquifer聽- an aquifer that is bound above and below by dense layers of rock and contains water under pressure
conjunctive use聽- the planned use of groundwater in conjunction with surface water to optimize total water resources
conservation聽- saving; not wasting; using water wisely
constituents聽- parts of a whole; components
consumer聽- one who consumes or uses economic goods or services
contaminate聽- to make unfit for use; to pollute
contractor聽- a water agency that signs a contract to acquire given amounts of water from another agency, usually under specified conditions
contour plowing聽- plowing done in accordance with the natural outline or shape of the land by keeping the furrows or ditches at the same elevation as much as possible to reduce runoff and erosion
cost聽- the outlay or expenditure (as of money, effort or sacrifice) made to achieve an object or advantage
cost-effective聽- able at least to pay for itself or make a profit
county water authority聽- a public water district serving a county-wide area
cubic foot of water聽- the amount of water needed to fill a cube that is one foot on all sides; about 7.5 gallons

D

dam聽- a structure built to hold back a flow of water
debt service聽- the repayment of borrowed money, plus interest
deficit聽- the amount by which a sum of money falls short of an expected amount
delta聽- fan-shaped area at the mouth of a river (where seas are relatively calm)
demand聽- the quantity of goods or services that consumers are willing and able to buy at a given price
deposition聽- the process of dropping or getting rid of sediments by an erosional agent such as a river or glacier; also called sedimentation
desalination聽- the process of removing salt from seawater or brackish water
dew聽- moisture in the air that condenses on solid surfaces when the air is saturated with water vapor
dew point聽- the temperature at which the air becomes saturated with water vapor
discharge聽- the amount of water flowing past a location in a stream/river in a certain amount of time - usually expressed in liters per second or gallons per minute
disinfect聽- to destroy harmful microorganisms
dissolve聽- to enter into a solution
divert聽- to direct a flow away from its natural course
divide聽- a ridge or high area of land that separates one drainage basin from another
drainage basin聽- all of the area drained by a river system
drought聽- a prolonged period of below-average precipitation

E

economic benefit聽- a gain that can be measured in dollars
economic cost聽- a cost involved in a trade-off that requires spending money
ecosystem聽- an interacting network of groups of organisms together with their non-living or physical environment
efficiency聽- effective operation as measured by a comparison of production with cost
endangered species聽- a species of animal or plant threatened with extinction
environment聽- the surroundings that affect the growth and development of an organism
environmental impacts聽- factors that affect organisms and the surroundings of organisms
Environmental Impact Report (EIR)聽- a state-mandated written summary of the positive and negative effects on the environment caused by the construction and operation of a project
erosion聽- the processes (including soil erosion) of picking up sediments, moving sediments, shaping sediments, and depositing sediments by various agents; erosional agents include streams, glaciers, wind and gravity
Escherichia coli (E. coli)聽- a common bacterium found in fecal matter; member of the coliform group
evaporation聽- water changing into vapor and rising into the air
exchange聽- the act of trading goods or services for those produced by people who are located elsewhere
expense聽- something spent (such as money, time or effort) to secure a benefit or bring about a result

F

factors of production聽- the resource inputs involved in the production of goods and services: for example, labor, land and capital
feces聽- waste excreted from the bowels of humans and animals
filtration聽- passing water through coal, sand and gravel to remove particles
filtration plant聽- place where water is cleaned and made safe to drink
financing cost聽- the fees charged by financial specialists and the interest charged on money borrowed to pay for a project
fish ladder聽- a device to help fish swim around a dam
fishery聽- the aquatic region in which a certain species of fish lives
floc聽- clumps of impurities removed from water during the purification process; formed when alum is added to impure water
flocculation聽- a step in water filtration in which alum is added to cause particles to clump together
floodplain聽- area formed by fine sediments spreading out in the drainage basin on either side of the channel of a river as a result of the river's fluctuating water volume and velocity
fog聽- clouds that form at the Earth's surface
frost聽- the ice that forms on surfaces as a result of the temperature of that surface reaching freezing before the air becomes saturated with water

G

gallon聽- a unit of measure equal to four quarts or 128 fluid ounces
geyser聽- a thermal spring that erupts intermittently and to different heights above the surface of the Earth; eruptions occur when water deep in the spring is heated enough to turn into steam, which forces the liquid water above it out into the air
glacial striations聽- lines carved into rock by overriding ice, showing the direction of glacial movement
glacier聽- a large mass of ice formed on land by the compacting and recrystallization of snow; glaciers survive from year to year, and creep downslope or outward due to the stress of their own weight
groundwater聽- water under ground, such as in wells, springs and aquifers
gullying聽- small-scale stream erosion

H

habitat聽- the place or type of site where a plant or animal naturally or normally lives and grows
hail聽- transparent or layered (ice and snow) balls or irregular lumps of solid water
hardness聽- a characteristic of water determined by the levels of calcium and magnesium
hatcheries聽- a place for hatching fish eggs
humus聽- decomposed bits of plant and animal matter in the soil
hydroelectric plant聽- a power plant that produces electricity from the power of rushing water turning turbine-generators
hydrologic cycle聽- the natural recycling process powered by the sun that causes water to evaporate into the atmosphere, condense and return to earth as precipitation
hydrology聽- the scientific study of the behavior of water in the atmosphere, on the Earth's surface and underground

I

iceberg聽- large chunks of ice that break off of coastal glaciers and float away
igneous聽- rock solidified from a molten state, such as lava and obsidian
impermeable聽- having a texture that does not permit water to move through quickly
imported water聽- water brought into an area from a distant source, such as from one part of a state to another via an aqueduct
impound聽- to confine in an enclosure, such as impounding water in a reservoir
impurity聽- any component which causes another substance to become contaminated
indicator聽- a device or substance used to show the presence of another substance
infiltration (also called percolation)聽- the entrance or flow of water into the soil, sediment or rocks of the Earth's surface
inorganic聽- chemicals not containing the element carbon
interest聽- payments made to an investor for the use of borrowed money
intrusion聽- the entrance of an unwanted element, such as saltwater, into freshwater supplies
inundation聽- covering over or flooding, such as flood waters covering a valley
irrigation聽- supplying water to agriculture by artificial means, such as pumping water onto crops in an area where rainfall is insufficient

L

labor聽- the mental and/or physical talents contributed by people for the production of goods or services
lactose聽- a white organic substance made from milk that is used in infant foods, bakery products and confections; also used as a "culture" in laboratories
landfill聽- an open area where trash is buried
leach聽- to remove components from the soil by the action of water trickling through
levees聽- dikes or other embankments which contain water within a given course
local runoff聽- water running off a local area, such as rainfall draining into a nearby creek

M

manufacturer聽- one who makes a product
marginal land聽- land which, in its natural state, is not well suited for a particular purpose, such as raising crops
member agency聽- one of 27 member public water providers associated with the Metropolitan Water District of Southern California, from which it purchases water and o whose board it is represented
microorganism聽- an organism of microscopic size, such as bacterium
migratory聽- moving from one area to another on a seasonal basis
mitigation聽- a way in which an agency may offset negative environmental impacts of a project or make the impacts less serious
mulch聽- material spread on the ground to reduce soil erosion and evaporation of water; include hay, plastic sheeting and wood chips
municipal water district聽- a public water provider, owned and operated by more than one city government, which supplies water to its member cities

N

natural environment聽- all living and nonliving things that occur naturally on the earth; not made
nomad聽- a wanderer, a person or animal which moves from place to place
non-economic benefit聽- a gain resulting from a trade-off that cannot be measured in dollars
nonpoint source pollution聽- pollution which comes from diffuse sources such as urban and agricultural runoff
NPDES (National Pollutant Discharge Elimination System) permits聽- permits issued to point sources for the purpose of limiting pollution in discharges

O

organic聽- any chemical containing the element carbon
overdraft聽- condition that occurs in a groundwater basin when pumping exceeds the amount of replenishment over a period of years
ozone聽- a gas that is bubbled through water to kill germs

P

pathogenic聽- capable of causing disease
percolation聽- water soaking into the ground
perennial yield聽- maximum quantity of water that can be annually withdrawn from a groundwater basin over a long period of time (during which water supply conditions approximate average conditions) without developing an overdraft condition
permeability聽- the capacity or ability of a porous rock, sediment, or soil to allow the movement of water through its pores
PEROXONE聽- a combination of peroxide and ozone used to kill germs in water
pH聽- a relative scale of how acidic or basic (alkaline) a material is; the scale goes from 0 to 14; 7 is neutral, acids have pH values less than 7 and bases have pH values higher than 7
photosynthesis聽- process in which chlorophyll-containing cells convert light into chemical energy, forming organic compounds from inorganic compounds
pipeline聽- carries water underground to homes and businesses
plankton聽- minute plants and animals floating in bodies of water; often a major source of nutrition for larger aquatic life forms
pollutant聽- any inorganic or organic substance that contaminates air, water or soil
point source pollution聽- pollution which comes from a well-defined source such as sewage treatment plant effluent from industrial dischargers. . .for purposes of the Clean Water Act, agricultural return flows are not regulated as a point source
pore spaces聽- the open areas, or spaces, in soil, sediments, and rocks that are filled by air or water
porosity聽- a measure of the ratio of open space within a rock or soil to its total volume
POTWs (Public Owned Treatment Works)聽- sewage treatment plants
precipitation聽- water falling toward the Earth's surface in the form of rain, drizzle, hail, sleet, or snow
pumping lift聽- distance water must be lifted in a well from the pumping level to the ground surface
pumping plant聽- facility that lifts water up and over hills

R

reclaimed water聽- wastewater that has been cleaned so that it can be reused for most purposes except drinking
recharge聽- increases in groundwater storage from precipitation, infiltration from streams, or human activity (artificial recharge), such as putting surface water into spreading basins
relative humidity聽- the ratio of the amount of moisture in the air to the maximum amount of moisture the air could hold under the same conditions; usually expressed as a percentage
reservoir聽- a pond or lake where water is collected and stored until it is needed
rills聽- small grooves, furrows, or channels in soil made by water flowing down over its surface; also another name for a stream - usually a small stream
runoff聽- liquid water that travels over the surface of the Earth, moving downward due to the law of gravity; runoff is one way in which water that falls as precipitation returns to the ocean

S

saltation聽- the movement of sand or fine sediment by short jumps above a streambed under the influence of a water current too weak to keep it permanently suspended in the moving water
salinity聽- saltiness
saturation聽- the condition of being filled to capacity
sea ice聽- solid water that forms when ocean or sea water freezes
section 319 grants聽- grants for nonpoint source pollution programs
sediments聽- fragments of material produced by weathering and erosion of rocks
sedimentation聽- the process of particles in water settling to the bottom of a tank
selenium聽- a non-metallic element in the same chemical group as sulfur; its compounds are harmful to wildlife or people when found above certain levels in water
septic tank聽- a sewage disposal tank in which bacteria decompose waste
sheet wash聽- a flow of rainwater that covers the entire ground surface with a thin film and is not concentrated into streams
sleet聽- precipitation that consists of clear pellets of ice; sleet is formed when raindrops fall through a layer of cold air and freeze
snow聽- precipitation that consists of frozen flakes formed when water vapor accumulates on ice crystals, going directly to the ice phase
soil聽- sediment on or near the Earth's surface that is formed by the chemical and physical weathering of rocks as well as the decay of living matter
soil subsidence聽- the lowering of the normal level of the ground, usually due to over pumping of water or oil from wells
spawn聽- to produce or deposit eggs, as those of aquatic animals
spring聽- groundwater seeping or flowing out of the Earth's surface; springs occur where the water table reaches the surface
SRF (State Revolving Fund)聽- funding, in the form of loans, available for the control of point and nonpoint source pollution
steam聽- water vapor that rises from boiling water
stream聽- the type of runoff where water flows in a channel downhill because of the pull of gravity
sublimation聽- formation of a gas from a solid, or vice-versa, without passing through the liquid phase
subsidence聽- sinking of the land surface due to a number of factors, of which groundwater extraction is one
subsurface water - all water - solid, liquid or gaseous聽- that occurs beneath the Earth's surface; located below the water table in the zone of saturation
surface runoff聽- water flowing along the ground into rivers, lakes, and oceans
surface water聽- all water, fresh and salty, on the Earth's surface
suspended聽- the state of floating in water rather than being dissolved in it
suspension聽- a method of sediment transport in which air or water turbulence supports the weight of the sediment particles, thereby keeping them from settling out or being deposited

T

thermal spring聽- a warm or hot water spring; many occur in regions of recent volcanic activity and are fed by water heated by contact with hot rocks far below Earth's surface
till聽- a deposit of sediment formed under a glacier, consisting of an unlayered mixture of clay, silt, sand, and gravel ranging widely in size and shape
topsoil聽- the top layer of soil; topsoil can grow better crops partly because it has more organic matter (humus), allowing it to hold more water than lower soil layers
toxic聽- poisonous; harmful to living organisms
transpiration聽- evaporation of water through the leaves of plants
trihalomethanes, trichloroethylene, perchloroethylene聽- organic compounds which may be harmful to health at certain levels in drinking water
turbidity聽- the state of having sediment or foreign particles suspended or stirred up in water

U

unconfined aquifer聽- an aquifer that discharges and recharges with an upper surface that is the water table
unsaturated zone聽- the subsurface zone, usually starting at the land surface and ending at the water table, that includes both water and air in spaces between rocks
usable storage capacity聽- the quantity of groundwater of acceptable quality that can be economically withdrawn from storage

W

wastewater聽- water that has waste material in it
wastewater treatment聽- cleaning wastewater
water cycle聽- the movement of water from the air to and below the Earth's surface and back into the air
water quality聽- the condition of water as it relates to impurities
water reclamation聽- treating wastewater so that it can be used again
water table聽- (1) the boundary in the ground between where the ground is saturated with water (zone of saturation) and where the ground is filled with water and air (zone of aeration); (2) the upper surface of the saturated zone that determines the water level in a well in an unconfined aquifer
water vapor聽- the gaseous state of water
watershed聽- a geographical portion of the Earth's surface from which water drains or runs off to a single place like a river; also called a drainage area
well聽- a hole or shaft drilled into the earth to get water or other underground substances

X

xeriscape聽- landscaping that doesn't require a lot of water

Z

zanja聽- Spanish word for ditch
zone of aeration聽- the portion of the ground from the Earth's surface down to the water table - the zone of aeration is not saturated with water because its pores are filled partly by air and partly by water
zone of saturation聽- the portion of the ground below the water table where all the pores in rock, sediment, and soil are filled with water

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John Misachi May 20 2021 in Geography