The functioning of the river in the urbanized area
may (and does) undergo changes as a result of anthropogenic activities performed within its valley and drainage basin and as a result of natural changes in the climate, i.e.
Maximum average of Rock Pigeon (Columba livia) was observed in Low Urbanized Area
There are at least three well-defined concepts of a city boundary in the United States that a researcher might use: the legal boundary of the city, the boundary of the built-up, urban region around a central city (an "urbanized area
"), and the boundary of a census-defined Metropolitan Statistical Area (MSA).
Towns and rural areas are described as being in the fringe, distant, or remote in relation to the closest urbanized area
. Until the new locale codes are fully adopted at federal, state, and local levels, NCES' Common Core of Data (CCD) survey system will continue to publish both the traditional and new locale codes for public schools and local education agencies beginning with the 2003-04 school year and continuing through the 2006-07 school year.
Among the assumptions upon which the QEM is built were that elementary school enrollment is 340 students, middle school enrollment is 500, high school enrollment is 1,000, and schools are close to an urbanized area
. In this white paper, the QEM is applied to schools with characteristics significantly different from those assumptions.
The Office of Management and Budget defines an MSA as an area that includes a city of at least 50,000 population or an urbanized area
of at least 50,000 with a total metropolitan area population of at least 100,000.
The Census Bureau's urbanized area
concept, however, reflects the actual built up area of a metropolis.
More than one county may be involved but each Metropolitan Statistical Area has a large urbanized area
with a population of at least 50,000 (Bureau of Census, 1983).
For someone who is traveling in an urbanized area
, amateur radio or a cellular telephone could work well.
It serves the area just to the north of Dallas-Fort Worth, with some fringe contour penetration into the urbanized area
Greater Los Angeles, for instance, increased its population by 45% between 1970 and 1990, while its urbanized area
swelled by nearly 300%.