About Housing First. 1  According to the National Alliance to End Homelessness, Housing First is an approach to ending homelessness that centers on providing people experiencing homelessness with housing as quickly as possible â and then providing services as needed.
In human geography, a catchment area is the area from which a city, service or institution attracts a population that use their services. For example, a school catchment area is the geographic area from which students are eligible to attend a local school. Supermarkets, on the other hand, have a much lower density, with catchment areas of several neighborhoods (or several villages in rural areas). 2  This principle, similar to the central place theory, makes catchment areas an important area of study for geographers, economists, and urban planners.
catchment basin, drainage area, drainage basin, river basin, watershed, basin. detention basin-a storage site (such as a small reservoir) that delays the flow of water downstream. retention basin-a storage site similar to a detention basin but the water in storage is permanently obstructed from flowing downstream.he area drained by a river or body of water. Also called catchment basin. 2. The surrounding area served by an institution, such as a hospital or school.