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.
Catchments and Watersheds â¢ 1 4 Catchments and Watersheds Catchments and watersheds define drainage areas of the land surface that contribute flow to particular edges on the Hydro Network. An Edge Catchment is the local drainage area associated with a particular Hydro Edge.