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Research about Colorado

Source-linked reports with geographic coverage including Colorado.

At least 1,369 records · Page 76Linked to original sources
USGS1988

Patterns of relative diversity within riparian small mammal communities, Platte River Watershed, Colorado

Relative diversity within and between small mammal assemblages of riparian and upland vegetation was evaluated at 6 study areas across an elevational gradient. In contrast to avian diversity analyses conducted at the same sites, species richness, relative diversity, and faunal similarity of small mammals were greater among upland rather than riparian communities across the cline. Beta diversity between riparian and upland small mammal communities is greater at higher elevations within the watershed. These higher elevation portions of watersheds must be emphasized in management strategies to conserve regional integrity of native small mammal faunas.

Colorado↗
USGS1988

NOAA-10 AVHRR thermal-infrared image of the Colorado Rocky Mountains

This month we demonstrate an example of the use of thermal infrared imagery to produce a relatively sharp surrogate shaded-relief image. The image shows one aspect of the drama and usefulness of calibrated thermal imagery that (because of compatible projection and pixel size) can be easily combined with other spectral bands of a satellite image. Such data can be enhanced in yet another way by stereoscopically combining two similar images with different orbital paths, such as was shown in the AVHRR column for January 1988.

Colorado↗
USGS1988

QED

Explore the source record for details and available documents.

Colorado↗
USGS1987

Errors in slope-area computations of peak discharges in mountain streams

During an evaluation of 70 slope-area measurements on higher-gradient streams (stream slopes greater than 0.002) throughout the United States, peak discharge measurements were found to be affected by n values, scour, expansion and contraction losses, viscosity, unsteady flow, number of cross sections, state of flow and stream slope. Problems due to measurement error can often be as great as or greater than 100% and leads to overestimation of the actual peak discharge. This can result in misleading maximum flood values, erroneous flood-frequency analyses and overdesign of flood-plain structures. A brief discussion of these problems, tentative solutions and research needs is presented. The critical-depth method of computing peak discharge provides the most reasonable results in higher-gradient streams.

Colorado↗
USGS1987

Reconnaissance geologic map of the Sangre de Cristo Wilderness Study Area, south-central Colorado

The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine the mineral values, if any, that may be present. Results must be made available to the public and to be submitted to the President and Congress. This report presents the results of geologic studies in the Sangre de Cristo Wilderness Study Area in the Rio Grande and San Isabel National Forests, south-central Colorado. The area was designated as a wilderness study area under Public Lay 96-560 in 1980.

Colorado↗
USGS1987

Cross sections showing stratigraphic framework of upper Cretaceous Dakota Sandstone, Mancos Shale, Mesaverde Group, and Mesaverde Formation, and lower Tertiary Wasatch Formation, west-central Piceance Basin, Garfield County, Colorado

Cross sections A-A' and B-B' show the stratigraphic framework of Upper Cretaceous rocks in part of the Piceance basin, northwestern Colorado. This Laramide basin is asymmetric in shape and has a gently dipping western flank and a steeply dipping eastern flank. The basin is bounded by the Uinta uplift to the northwest, the Douglas Creek arch to the west, the Axial Basin uplift to the north, the White River uplift to the east, the Gunnison uplift and the Sawatch-Elk range to the southeast, and the Uncompahgre uplift to the southwest.

Colorado↗
USGS1987

Summary of water-resources activities of the U.S. Geological Survey in Colorado: Fiscal year 1987

The annual summary of water-resources activities in Colorado is presented for fiscal year 1987. The report includes an introduction of these activities and names of the management personnel to whom information requests may be addressed; a summary of the U.S. Geological Survey mission and of the Water Resources Division mission; and a discussion of the water resources in Colorado in fiscal year 1987, including data collection on surface water and groundwater. All current Colorado hydrologic investigations are listed - their problems, objectives, approaches, progress, and plans for fiscal year 1987. A list of current cooperators for fiscal year 1987 and a list of reports published or released during fiscal year 1987 also are given.

Colorado↗