Water that is stored beneath the earth's surface. This water sustains streamflows during times without precipitation, and is the primary source of water in most areas.

Groundwater that moves from one place to another depending on soil and geologic properties, natural boundaries that inhibit movement, and the temporal and spatial factors that govern the flow regime.

The beginning or point of origin for a stream or river. The headwaters of a river may be formed by springs, the confluence of small streams, lakes, or by snowmelt.
Also known as a river's Source.

Terms, Definitions, and Concepts: Ecology, Forestry, Geography, Hydrology, Science, Water

Different or dissimilar in structure, function, composition, quality, or origin.

Describes the solar energy-driven process by which water moves and is distributed on the earth's surface; includes as major components precipitation, evaporation, transpiration, infiltration, surface runoff, and groundwater flows.

The study of water, including its occurrence, distribution, movement, properties, and processes.

The area that immediately underlies a riverbed, varying in depth depending on geologic structure, composition, and the size of the river bottom. Organisms can be quite plentiful in this zone, at times even more abundant than those inhabiting the river bottom itself, with oxygen being the limiting factor.

Terms, Definitions, and Concepts: Biology, Ecology, Geology, Hydrology, Science, Water

Definition: A body of water, such as a pond, lake, tank, or reservoir, that is confined within a human-built enclosure; the structure that creates such a body of water.

Terms, Definitions, and Concepts: Agriculture, Conservation and Sustainability, Construction and Building, Ecology, Forestry and Silviculture, Geography, Hydrology, Management, Water

The process by which precipitation seeps into sub-surface layers of the soil; some is held as soil moisture recharge, some resurfaces as streamflow, and the remainder becomes part of groundwater flows (aquifers).
Also known as Percolation.

Terms, Definitions, and Concepts: Ecology, Forestry and Silviculture, Hydrology, Science, Water

Precipitation that infiltrates into and flows just below the soil surface, and that moves toward a drainage channel in the same direction as overland flow, but at a slower rate.

Terms, Definitions, and Concepts: Ecology, Forestry, Hydrology, Science, Water

Definition: An inland body of water, generally of considerable size, that collects and stores usually fresh water from surface runoff, and where there is little or no horizontal movement of the impounded water. Lakes can be formed by volcanic, human, or glacial activity; by mass wasting such as landslides; or by stream channel abandonment such as may occur with old, meandering rivers (an "oxbow" lake).

Terms, Definitions, and Concepts: Ecology, Geography, Geology, Hydrology, Real Estate, Science, Water

The bank of a stream or river channel located to the left as one faces in the direction of the current (downstream).

Terms, Definitions, and Concepts: Geography, Hydrology, Science, Water

A levee, also known as a dike or flood-wall, is a natural or man-made flood-control structure usually consisting of a wall or mound of earth (sometimes rock or stone) running generally parallel to a river or other drainage channel, or along ocean frontage. Levees help to contain floods within the channel by raising the height of the riverbank, thereby allowing the channel to hold a greater volume of water before flooding begins. Levees are also used to protect low-lying land near the ocean that has been reclaimed by pumping and dredging then developed, as in the coastal areas of Louisiana (United States).

An artificial line used by surveyors to measure the natural, uneven, winding property line formed by rivers, streams and other watercourses bordering a property.

The point where a river ends its course and empties its contents into another body of water, such as a lake or sea.

Terms, Definitions, and Concepts: Ecology, Forestry, Geography, Hydrology, Science, Water

Definition: A federal agency of the United States created in 1935 (as the Soil conservation Service or SCS) to assist private landowners and managers with conservation and protection of soil, water, and other natural resources. The NRCS provides information and consultation services, as well as financial assistance for conservation projects and programs.

Terms, Definitions, and Concepts: Agriculture, Conservation and Sustainability, Forestry, Hydrology, Management, Science, Water

A watercourse that is deep and wide enough to accept commercial vessel (boat) traffic. Also known as a navigable waterway.

A watercourse that is deep and wide enough to accept commercial vessel (boat) traffic. Also known as a navigable river.

A watercourse that is either too shallow or too narrow to allow commercial vessel (boat or ship) traffic. Also known as a non-navigable waterway.

A watercourse that is either too shallow or too narrow to allow commercial vessel (boat or ship) traffic. Also known as a non-navigable river.

Describes property with a boundary or boundary that is adjacent to a sea or ocean, including property with frontage on a bay, cove, gulf, or other such inlet.

Terms, Definitions, and Concepts: Real estate, Water

Office of Arizona Department of Water Resources (ADWR) that oversees the Assured and Adequate Water Supply Programs. Both programs address 100-year water supply issues in new subdivisions in Arizona.

Surface runoff that is flowing toward a confining channel such as a river or stream. Some overland flow is captured by surface bodies of water such as lakes, ponds, or wetlands before it can reach the stream or river channel.

Terms, Definitions, and Concepts: Ecology, Forestry, Hydrology, Science, Water

The process by which precipitation seeps into sub-surface layers of the soil; some is held as soil moisture recharge, some resurfaces as streamflow, and the remainder becomes part of groundwater flows (aquifers).
Also known as Infiltration.

Terms, Definitions, and Concepts: Ecology, Forestry and Silviculture, Hydrology, Science, Water

Occurring regularly or semi-regularly in time, as a periodic tenancy, periodic rent, periodic portfolio review, etc.