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The 1935 images were obtained as digitally scanned versions of aerial photographs acquired by the U.S. Department of Agriculture at a scale of 1:31,680. The actual date of image acquisition is not known. The images were previously scanned at 600 dpi to produce a nominal pixel size of 1.28 m (Friedman et al., 2015). The images were registered and rectified using identifiable common points from the 1996 DOQQs. See description of positional accuracy below. Data derived from features mapped from the 1935 images were presented in: Friedman, J.M., Vincent, K.R., Griffin, E.R., Scott, M.L., Shafroth, P.B., and Auble, G.T., 2015, Processes of arroyo filling in northern New Mexico, USA, GSA Bulletin, 127(3/4), 621-640....
Types: Citation;
Tags: Bernardo, NM,
New Mexico,
Rio Puerco,
Socorro County,
Valencia County, All tags...
aerial photographs,
arroyo geomorphology,
arroyos,
channel change,
fluvial geomorphology,
riparian vegetation, Fewer tags
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Concern about spread of non-native riparian trees in the western USA has led to Congressional proposals to accelerate control efforts. Debate over these proposals is frustrated by limited knowledge of non-native species distribution and abundance. We measured abundance of 44 riparian woody plants at 475 randomly selected stream gaging stations in 17 western states. Our sample indicates that Tamarix ramosissima and Elaeagnus angustifolia are already the third and fourth most frequently occurring woody riparian plants in the region. Although many species of Tamarix have been reported in the region, T. ramosissima (here including T. chinensis and hybrids) is by far the most abundant. The frequency of occurrence of...
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The 1970s images were obtained as digital scans on CDs, with no metadata. Source information for the original aerial photographs is not available. Original photo scale was about 1:40,000 for the 1975 images (filenames beginning "r75")and 1:12,000 for the 1979 images (filenames beginning "rfl"). I registered and rectified these images using identifiable common points from 1996 DOQQs. See the description of positional accuracy below. Data derived from features mapped from the 1970s images were presented in: Friedman, J.M., Vincent, K.R., Griffin, E.R., Scott, M.L., Shafroth, P.B., and Auble, G.T., 2015, Processes of arroyo filling in northern New Mexico, USA, GSA Bulletin, 127(3/4), 621-640. doi: 10.1130/B31046.1
Types: Citation;
Tags: Bernardo, NM,
New Mexico,
Rio Puerco,
Socorro County,
Valencia County, All tags...
aerial photographs,
arroyo geomorphology,
arroyos,
channel change,
fluvial geomorphology,
riparian vegetation, Fewer tags
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1996 georeferenced aerial photographs cover the lower Rio Puerco from the confluence with the Rio San Jose 70 km down-valley to the confluence with the Rio Grande. The images were obtained from enlargements of 1:40,000 scale National Aerial Photography Program (NAPP) photographs printed from negatives at a scale of 1:5,000, then scanned at 600 dpi. Pixel size of the raster images is about 0.22 m, compared to the DOQQs, which have 1-m pixel size. The segments were registered and rectified in ArcINFO using common points from USGS DOQQs published in 1999, which were derived from the same 1996 NAPP photo set, with terrain corrections from a 1-degree DEM applied. Registration points were typically center of mass of small...
Types: Citation;
Tags: Bernardo, NM,
New Mexico,
Rio Puerco,
Rio San Jose,
Socorro Count, All tags...
Valencia County,
aerial photographs,
arroyo geomorphology,
arroyos,
channel change,
fluvial geomorphology,
riparian vegetation, Fewer tags
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Geomorphic features mapped from historical aerial photographs (1935, 1950s, 1970s, and 1996), satellite imagery (November 2006), and digital aerial imagery (Standard Imagery LiDAR Composite; Spectrum Mapping, LLC, 2005) are provided in shapefiles for each year of data. Features mapped are tops of the arroyo walls, edges of the arroyo bottom (covering the active floodplain and channel), tops of channel banks, the channel centerline, canopy cover, and 2006 flood sand deposits. In addition, shapefiles containing a reference arroyo centerline, points at 0.5-km intervals along the arroyo centerline, and polygons identifying the 0.5-km arroyo segments are provided. Individual metadata files describe the contents of each...
Types: Citation;
Tags: Bernalillo County,
Bernardo, NM,
New Mexico,
Rio Puerco,
Rio San Jose, All tags...
Socorro County,
Valencia County,
aerial photographs,
arroyos,
fluvial geomorphology,
geomorphic change,
geomorphic mapping,
lidar,
remote sensing,
semiarid,
southwestern United States, Fewer tags
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