The spatial relationship between patterns of disappeared streams and residential development in Portland, Oregon, USA

Figures & data

Figure 1. Map of the Portland metropolitan region with major rivers and streams.

General Map of Portland Urban Growth Boundary and Johnson Creek Watershed Boundary with major rivers, roads, City of Portland boundary depicted by different colors.

Table 1. Sources and descriptions of maps.

Map name	Year	Method	Scale	Source
Location of streams (1852)
Portland	1852	unknown	unknown	City of Portland Archives
Location of streams (1896-1916)
Portland	1905	Surveyed in 1896	1:62500	USGS
Oregon City, Boring	1914	Surveyed in 1911–1912	1:62500	USGS
Tualatin	1915	Surveyed in 1915	1:62500	USGS
Troutdale	1918	Surveyed in 1916	1:62500	USGS
Location of streams (1954)
Camas	1954	Aerial photos and planetable survey in 1951, field check in 1954	1:24000	USGS
Damascus	1954	Aerial photos in 1952, field check in 1954	1:24000	USGS
Gladstone, Linnton	1954	Aerial photos, stereioplanisgraph in 1952, field check in 1954	1:24000	USGS
Mount Tabor	1954	Aerial photos, planetable survey, photogrammetric methods in 1951-1952, field check in 1954	1:24000	USGS
Lake Oswego, Sandy	1954	Aerial photos, planetable survey, photogrammetric methods in 1952, field check in 1954	1:24000	USGS
Portland, Vancouver	1954	Aerial photos, planetable survey, photogrammetric methods in 1951, field check in 1954	1:24000	USGS
Sauvie Island	1954	Aerial photos, planetable survey, photogrammetric methods in 1951, topo 1953–54	1:24000	USGS
Location of streams (1982-1996)
Linnton	1990	Aerial photos in 1952, revised 1990, edited in 1995	1:24000	USGS
Mount Tabor	1990	Aerial photos in 1951-1952, revised 1990, edited in 1995	1:24000	USGS
Oregon City	1982	Aerial photos in 1955-1974, 1981, edited in 1982	1:100000	USGS
Beaverton	1984	Aerial photos in 1981, edited In 1984	1:24000	USGS
Portland, Sauvie Island, Vancouver	1990	Aerial photos in 1951, Revised in 1990, edited in 1995	1:24000	USGS
Camas	1993	Aerial photos in 1951, revised in 1993, field checked in 1994, edited in 1996	1:24000	USGS
Location of streams (2014-2017)
Damascus, Gladstone, Lake Oswego, Linton, Mount Tabor, Portland, Sandy, Sauvie Island, Camas	2017	Imagery 2014	1:24000	USGS

Figure 2. Map of disappeared streams symbolized by the oldest house construction date in the proximity of the former stream locations.

Map of Portland Urban Growth Boundary and Johnson Creek Watershed Boundary with disappeared streams symbolized by different colors associated with the oldest house construction date on the disappeared stream.

Figure 3. Map of disappeared streams symbolized by the average house construction date in the proximity of the former stream locations.

Map of Portland Urban Growth Boundary and Johnson Creek Watershed Boundary with disappeared streams symbolized by different colors associated with the average house construction date on the disappeared stream.

Figure 4. A high-resolution aerial photo showing examples of houses that were built in the proximity of a disappeared stream in the City of Portland, Oregon.

A map showing one disappeared stream in a neighborhood and different houses symbolized by the house construction date. Below the legend is three historic topographic maps of the same area showing how the stream disappeared over time.

Figure 5. Density of streams per census block group (m of stream/km²).

Map of Portland Urban Growth Boundary and Johnson Creek Watershed Boundary with circles ranging in sizes according to the density of disappeared streams per census block group (m of stream/km2). The color of the census block groups represent the average house construction date where light blue is oldest (1896-1953), and the darkest blue is more recent (1990-2017).

Data Availability Statement

The USGS topographic maps are available at https://ngmdb.usgs.gov/topoview/.

Regional Land Information System (RLIS) stream routes layer and parcel layer are available at the Oregon Metropolitan RLIS Discovery system https://gis.oregonmetro.gov/. The digitized disappeared stream GIS data that support the findings of this study are available at https://github.com/greggreg1/PDX_Disappeared_Streams.