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351 - 375 of 881 Items << < 10 11 12 13 14 15 16 17 18 19 > >>
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Digital Elevation Models (DEMs) of topography are widely used in Geographic Information Systems (GIS) to derive information for the modeling of hydrologic processes. We present a general method for flow analysis that builds upon the representation...
2009-07-13
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Introduction: The objective of this research to develop a spatially distributed water balance model based on the integration of spatially distributed data. Progress this year has consisted of model development,...
1992-01-01
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Spatial variability in snow accumulation and melt owing to topographic effects on solar radiation, snow drifting, air temperature and precipitation is important in determining the timing of snowmelt releases. Precipitation and temperature effects...
1998-08-01
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We have developed a sediment budget and routing model for the Le Sueur River, southern Minnesota. An integral component of the model considers the sediment storage and erosion dynamics of the coupled channel-floodplain system. The Le Sueur River...
2009-01-01
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The high-density of airborne LiDaR and even higher-density of ground-based LiDaR data now facilitates the production of incredibly rich digital elevation and terrain models (DEMs and DTMs), which have transformed how geomorphologists can describe...
2010-12-01
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The incised and degraded habitat of Bridge Creek, tributary to the John Day River in central Oregon, is thought to be limiting the local population of ESA-listed steelhead trout (Oncorhynchus mykiss). Restoration efforts for this watershed are...
2012-12-01
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155 photographs, negatives, and slides from Wayne D.
Criddle's irrigation and water conservation work. Also contains a publicity photo from
the United States Department of Agriculture, which includes President Lyndon B....
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This collection consists of the papers
of environmental activist Clifton R. Merritt. From 1964 to1978 Merritt served
as Director of Field Services for The Wilderness Society. After leaving The
Wilderness Society, Merritt founded the...
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Complex water resource systems occur within the southeastern Idaho phosphate field. Environmental factors such as the geologic, topographic, hydrogeologic, chemical, and climatic characteristics of the area largely control the occurrence, movement...
1980-03-01
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Propo sed A c t i v i t i es F.Y. 1953 - $55.010—These funds are to be used for transmission studies, power studies, topographic surveys, sedimentation tests and studies, geologic reconnaissance and construction materials prospecting, economic...
2008-12-01
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The relief model of the Upper Colorado River Basin, pictured above, was
constructed by t h e U p p e r Colorado River Commission in cooperation with
t h e Babson Institute of Business Administration. This...
2008-11-01
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Stabilization of the Yaquina Bay shoreline along the northeastern edge of the Hatfield Marine
Science Center (HMSC) campus became necessary to halt erosion that threatened both HMSC
critical infrastructure (seawater storage tank) and public access...
2014-03-05 (iso8601)
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Floods are the most frequent natural disaster, causing more loss of life and property than any other in the USA. Floods also
strongly influence the structure and function of watersheds, stream channels, and aquatic ecosystems. The Pacific...
2015-12-30 (iso8601)
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University deployed two arrays of three sonobuoys over the Blanco
fracture zone and two arrays of four sonobuoys over the Gorda ridge
to detect and locate microearthquakes. Microearthquake activity predicted
by plate tectonic theory for the Blanco...
1975-09-05 (iso8601)
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A proposed modeling technique that yields a best fit to observed
wide-angle reflection profiles incorporates (1) the use of migrated vertical
reflection profiles to provide topographic control, (2) ray tracing
to produce theoretical wide-angle...
1973-10-29 (iso8601)
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The geologic origin of the Medusae Fossae Formation (MFF) has remained a mystery despite three decades of research. To better constrain its formation, an in-depth analysis of observations made in the literature was combined with a new survey of...
2008 (iso8601)
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A primitive equation model is used to study the finite-amplitude evolution of instabilities associated with the coastal upwelling front. Simulations of increasing complexity are examined that represent idealizations of summer conditions off the...
2005-09 (iso8601)
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The effects of alongshore variations in bottom topography and coastline on the wind-stress-forced barotropic motion over a continental shelf and slope are studied. Perturbation methods are used to obtain solutions for forced and free continental...
1976-11 (iso8601)
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Broadband body waves recorded at 15 digital
seismic stations worldwide are used to study the rupture
process of the May 23, 1989 Macquarie Ridge earthquake.
The centroidal solution (strike 211°, dip 86°, rake 180°, and
depth of 10 km below the...
1990 (iso8601)
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Submersible investigations of the Cascadia accretionary
complex have identified localized venting of methane gas
bubbles in association with gas hydrate occurrence. Acoustic
profiles of these bubble plumes in the water column in the
vicinity of...
2003-06-26 (iso8601)
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