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Eel River
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Power, Mary E.
Add Dataset to Cart 1.36 MB Eel River Quads A listing of Quads available from the USGS covering some or all of the Eel River basin, and location maps in jpg and pdf formats.
Add Dataset to Cart 308.22 KB Eel River Steelhead Study Authors: Mary Power Throughout the world, historically large populations of native anadromous salmonids are in severe decline or extinct. In the United States alone, twenty-six Evolutionarily Significant Units of Pacific salmonid are currently threatened or endangered. These declines are most commonly attributed to degradation of spawning and rearing habitat resulting from increased loading of fine sediments. Although excessive loading of fine sediments into rivers is well known to degrade salmonid spawning habitat, its effects on the demographically critical rearing juveniles have been unclear. We experimentally manipulated fine bed sediment in a northern California river and examined responses of a juvenile salmonid. Increasing concentrations of deposited fine sediment decreased growth and survival of juvenile steelhead trout. These declines resulted from a shift in invertebrates toward burrowing taxa unavailable as prey and from increased steelhead activity and injury at higher levels of fine sediment. The relationship between deposited fine sediment and juvenile steelhead growth is linear. This suggests that there is no threshold below which exacerbation of fine sediment delivery and storage in gravel bedded rivers will be harmless, but also that any reduction will produce immediate benefits for salmonid restoration.
Add Dataset to Cart 1.37 GB Geology and Geomorphic Features Related to Landsliding This is a series of maps produced by the California Division of Mines and Geology (now known as the California Geological Survey). This contains most of the 7.5' USGS Quads in and around Angelo.

The quad names are all from either Mendocino or Humboldt County.

The series was published from 1983-84. The file numbers refer to the CALIFORNIA DMG OPEN-FILE REPORT.
Add Dataset to Cart 29.05 GB Shuttle Radar Topography Mission (SRTM) This is the SRTM dataset. The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000.

SRTM is an international project spearheaded by the National Geospatial-Intelligence Agency (NGA) and the National Aeronautics and Space Administration (NASA).


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Obtained on 5/30/2007 from:

30m US:
ftp://e0srp01u.ecs.nasa.gov/srtm/version1/United_States_1arcsec/1arcsec/
(Click for Full Abstract)
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