Requirement of Arizona's Departments of Water Resources (ADWR) and Real Estate (ADRE) that developers (subdividers) demonstrate that an assured or adequate water supply will be physically, legally, and continuously available for the next 100 years in new subdivisions. If the subdivision is located within one of ADWR's Active Management Areas (AMA), a public report will not be issued and lots may not be sold until an assured 100-year water supply is demonstrated. Outside of AMA's, developers are required to ask ADWR for an assessment of the availability of water. In these areas, lots may still be sold even if ADWR deems the water supply inadequate, as long as this information is disclosed to prospective buyers.

1. The process of incorporating observations about a situation or phenomenon into a framework of prior knowledge, allowing one to propose possible explanations for it. This type of reasoning is necessary for the formulation of hypotheses using the scientific method. 2. Using specific observations or accepted scientific facts to develop tentative explanations for situations or phenomena. This process often involves the use of analogies in developing possible explanations, also known as hypotheses.

The process of incorporating observations about a situation or phenomenon into a framework of prior knowledge, allowing one to propose possible explanations for it. This type of reasoning is necessary for the formulation of hypotheses using the scientific method.

1. The gradual and natural growth of land resulting from forces of nature, as in sediment deposition by a river or stream.
2. The incremental augmentation or accrual of something, such as interest on an investment.

Area measurement (square measure) used primarily in the United States. One (1) acre is equal to 43,560 square feet, 4,046.86 square meters, or 0.4047 hectares.

One (1) acre equals 43,560 square feet.
One (1) acre equals 0.4047 hectares.
One (1) acre equals 10 square chains.
One (1) acre equals 160 square rods.
One (1) acre equals 160 square poles.
One (1) acre equals 160 square perches.
One (1) acre equals 4,840 square yards.
One (1) acre equals 4,046.856 square meters.
One (1) acre equals 0.0016 square miles.
One (1) acre equals 0.0016 sections.
One (1) acre equals 0.004 square kilometers.
One (1) acre equals 0.0000434 townships.
One (1) acre equals 1.183676 arpents.
One (1) acre equals 4.0 roods.

A unit of water volume measurement; the amount of water that would cover one acre of land to a depth of one foot.

Administered by the Arizona Department of Water Resources (ADWR), the state's Active Management Areas (AMA's) were established to provide long-term management and conservation of limited groundwater supplies. The five (5) AMA's - Prescott, Phoenix, Pinal, Tucson, and Santa Cruz - cover the majority of Arizona's agricultural land and urban population centers that exist where groundwater supplies are extremely limited. Rules governing water use and land development in AMA's are generally more stringent and focused on conservation of water resources in than elsewhere in the state. Applications for new development and subdivisions are managed by ADWR's Office of Assured and Adequate Water Supply under the Assured Water Supply Program.

This program operates outside Active Management Areas (AMA's) in the state of Arizona to address water availability in new subdivisions. Developers or subdividers are required to request a water supply assessment for the next 100 years from the Arizona Department of Water Resources (ADWR). If the 100-year water supply is deemed inadequate, lots may be sold only if the developer clearly discloses this fact to potential buyers.

Definition: Sediment, often containing sand, gravel, rock fragments, clay, or the like, that is deposited by moving water, as along a lake shore or river.

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

An underground geologic stratum or formation through which water can percolate or be transmitted. Flow of water within an aquifer or between aquifers is usually quite slow, and can occur any direction. There are two primary types of aquifers: confined and unconfined.

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

The Department of Water Resources is Arizona's state water management agency. Created during enactment of the Groundwater Management Code (1980), the department is charged with securing long-term water supplies for communities within the State of Arizona. Principal duties of ADWR include implementation of the Groundwater Management Code, registration of all surface and groundwater rights, ensuring the safety of non-federal dams, assisting with local management of floodplains, and representing Arizona in interstate water discussions.

The direction in which a slope faces, usually recorded as a bearing or azimuth.

Program of Arizona Department of Water Resources Office of Assured and Adequate Water Supply. This program operates within designated Active Management Areas (AMA) to ensure the availability of water for new subdivisions for the next 100 years. A public report from the Arizona Department of Real Estate (ADRE) that allows subdivision lots to be sold will only be issued if the 100-year water supply has been demonstrated to be legally, physically, and continually available.

Natural Sciences: 1. The steep, sloped sides of a river or stream that create the channel in which streamflow is carried; the sloped sides of any drainage or irrigation channel.
2. A ledge or other elevated formation under the surface of a sea or ocean that forms an area of relatively shallow water.
Finance: 3. An institution where funds are deposited and held in various types of accounts. Banks usually allow account holders to issue checks or notes on funds held by the bank; banks may also lend funds or even issue money.

Terms, Definitions, and Concepts: Ecology, Economy, Finance and Investment, Hydrology, Science, Water

Water that has percolated into the soil of the banks of a stream or river as a result of rising water levels in the stream or river channel; the capacity of the banks of a stream or river to store water.

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

See "Drainage basin".

Specifically, refers to the land area where precipitation falls. In practical use, it means the same thing as "watershed".

The final step in the scientific method. After the experiment is conducted, the expected result is compared to the observed result, and a determination is made that the research hypothesis is either valid or invalid. If deemed invalid, a new or alternate hypothesis must be developed, and the scientific research process (scientific method) starts anew.

The point where two streams or rivers meet, forming a larger river; the point where a tributary joins the main river channel.

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

Definition: A structure acting as a barrier to hold back water, usually erected as a bank or wall across a free-flowing watercourse such as a stream or river. Dams may be constructed of earth, rocks, logs, or anything else that will create a reservoir; large modern dams are usually constructed almost wholly of concrete reinforced with steel. The purposes of dams include flood control, irrigation, navigation, recreation, and the generation of hydroelectric power. Nearly every major river in the world has at least one dam. Some of the drawbacks of dams include degraded habitat for fish, birds and other wildlife; reductions in water quality; reduced streamflows; and interruption of the natural sediment deposition cycle.

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

1. The process of moving from general evidence, principles, or nonobservable explanations to specific observable actions, consequences, or conclusions. 2. In the scientific method, deductive reasoning is used to determine the specific observations, measurements, or other data that will either support or contradict the research hypothesis.

1. The process of moving from general evidence, principles, or nonobservable explanations to specific observable actions, consequences, or conclusions. 2. In the scientific method, deductive reasoning is used to determine the specific observations, measurements, or other data that will either support or contradict the research hypothesis.

A dike, also known as a levee 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. Dikes 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. Dikes are also used to protect low-lying land near the ocean that has been reclaimed by pumping and dredging and developed, as in the coastal areas of Louisiana (United States) or the Netherlands.

1. Variation in the physical characteristics of ecosystems across a landscape caused by variation in soil, slope, aspect, elevation, climate, and geology, and the accompanying variation in biotic communities. Also known as ecological or biological diversity.