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 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 ten (10) square chains. One (1) acre equals 160 square rods, poles, or perches. One (1) acre equals 4,840 square yards. One (1) acre equals 4,046.856 square meters. One (1) acre equals 0.4047 hectares. One (1) acre equals 0.0016 square miles or 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.

Department of Arizona state government that oversees and regulates real estate transactions and enforces real estate statutes, particularly Arizona Revised Statutes (A.R.S.) Title 32, Chapter 20 - the Code of Real Estate.

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.

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.

See "Drainage basin".

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

The disclosure document issued by the Arizona Department of Real Estate (ADRE) which allows a developer or subdivider to sell lots within a platted, recorded subdivision. Also known less formally as the public report, this document is issued only after the extensive subdivision application has been approved and the subdivision has been physically inspected. A demonstration of a 100-year water supply may also be required.

The area of land drained by a river and its tributaries. Includes both surface runoff and groundwater flows.

The process by which water from land, bodies of water, or other surfaces reverts to gaseous form and returns to the atmosphere.

The process used to test research hypotheses in the scientific method. In order to be useful in scientific inquiry, an experiment should be objective, with reliable and verifiable data. In addition, the results of the experiment must be reproducible by other scientists.

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.

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.

A body of water, such as a pond, lake, tank, or reservoir, that is confined within a human-built enclosure.

The process by which precipitation enters 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).

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

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