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Filter Total Items: 716
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Year Published: 2003

Historical changes in the Columbia River estuary based on sediment cores: feasibility studies

The importance of the Columbia River estuary to salmon, other fishes, migratory birds, and other species is fairly well established. Relatively little is known, however, about long-term, historic variations in biological processes and conditions within the estuary. For example, have conditions varied greatly with climatic regime shifts and how has...

Petersen, J.H.; Reisenbichler, R.; Gelfenbaum, G.R.; Peterson, C.; Baker, D.; Leavitt, P.R.; Simenstad, C.A.; Prahl, F.G.

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Year Published: 2003

Identification of a genetic marker that discriminates ocean-type and stream-type chinook salmon in the Columbia River basin

A marker based on randomly amplified polymorphic DNA (RAPD), OT-38, was discovered that nonlethally discriminates between stream-type and ocean-type populations of chinook salmon Oncorhynchus tshawytscha in the Columbia River basin, including the threatened fall-run (ocean-type) and spring-run (stream-type) Snake River populations. This marker was...

Rasmussen, C.; Ostberg, C.O.; Clifton, D.R.; Holloway, J.L.; Rodriguez, R.J.
Identification of a genetic marker that discriminates ocean-type and stream-type chinook salmon in the Columbia River basin; 2003; Article; Journal; Transactions of the American Fisheries Society; Rasmussen, C.; Ostberg, C. O.; Clifton, D. R.; Holloway, J. L.; Rodriguez, R. J.

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Year Published: 2003

Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys. Annual report 2002-2003

Two fundamental aspects of lamprey biology were examined to provide tools for population assessment and determination of critical habitat needs of Columbia River Basin (CRB) lampreys (the Pacific lamprey, Lampetra tridentata, and the western brook lamprey, L. richardsoni). We evaluated the usefulness of current diagnostic characteristics for...

Meeuwig, M.H.; Bayer, J.M.; Seelye, J.G.; Reiche, R.A.

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Year Published: 2003

Impacts of the Columbia River hydroelectric system on main-stem habitats of fall chinook salmon

Salmonid habitats in main-stem reaches of the Columbia and Snake rivers have changed dramatically during the past 60 years because of hydroelectric development and operation. Only about 13% and 58% of riverine habitats in the Columbia and Snake rivers, respectively, remain. Most riverine habitat is found in the upper Snake River; however, it is...

Dauble, D.D.; Hanrahan, T.P.; Geist, D.R.; Parsley, M.J.
Impacts of the Columbia River hydroelectric system on main-stem habitats of fall chinook salmon; 2003; Article; Journal; North American Journal of Fisheries Management; Dauble, D. D.; Hanrahan, T. P.; Geist, D. R.; Parsley, M. J.

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Year Published: 2003

Lateral line pore diameters correlate with the development of gas bubble trauma signs in several Columbia River fishes

Gas bubble trauma (GBT) caused by gas supersaturation of river water continues to be a problem in the Columbia River Basin. A common indicator of GBT is the percent of the lateral line occluded with gas bubbles; however, this effect has never been examined in relation to lateral line morphology. The effects of 115, 125 and 130% total dissolved gas...

Morris, R.G.; Beeman, J.W.; VanderKooi, S.P.; Maule, A.G.
Lateral line pore diameters correlate with the development of gas bubble trauma signs in several Columbia River fishes; 2003; Article; Journal; Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology; Morris, R. G.; Beeman, J. W.; VanderKooi, S. P.; Maule, A. G.

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Year Published: 2003

Mapping the spatial distribution and time evolution of snow water equivalent with passive microwave measurements

This paper presents an algorithm that estimates the spatial distribution and temporal evolution of snow water equivalent and snow depth based on passive remote sensing measurements. It combines the inversion of passive microwave remote sensing measurements via dense media radiative transfer modeling results with snow accumulation and melt model...

Guo, J.; Tsang, L.; Josberger, E.G.; Wood, A.W.; Hwang, J.-N.; Lettenmaier, D.P.
Mapping the spatial distribution and time evolution of snow water equivalent with passive microwave measurements; 2003; Article; Journal; IEEE Transactions on Geoscience and Remote Sensing; Guo, J.; Tsang, L.; Josberger, E. G.; Wood, A. W.; Hwang, J. -N.; Lettenmaier, D. P.

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Year Published: 2003

Migration behavior of juvenile salmonids and evaluation of a modified flume entrance at Cowitz Falls Dam, Washington, 2001

Historically, the Cowlitz River watershed supported abundant runs of anadromous salmonids. The completion of the surface collection system and fish facility at the Cowlitz Falls Dam presented a unique opportunity to restore anadromous salmonids to the upper Cowlitz River watershed. Collecting smolts at Cowlitz Falls Dam, or before they enter the...

Farley, M.J.; Perry, R.W.; Shurtleff, D.J.; Feil, D.H.; Rondorf, D.W.

Filter Total Items: 859
The sound of summer: rockfall inside the crater of Mount St. Helen...
August 6, 2013

The sound of summer: rockfall inside the crater of Mount St. Helens.

In summer, the crater of Mount St. Helens is filled with a near constant sound of rockfall from the steep 600 m high (about 2000 feet) crater walls. The falling rock kicks up ash and dust (pulverized rock) as it tumbles onto the crater floor. View of east crater wall.

Steam vent near 1980-1986 dome, in the crater of Mount St. Helens....
August 6, 2013

Steam vent near 1980-1986 dome, in the crater of Mount St. Helens.

Steaming continues on the 1980-1986 dome. View to the south and the east arm of Crater Glacier.

Fumerole near Mount St. Helens' 1980-86 dome maintains hole in Crat...
August 6, 2013

Fumerole near Mount St. Helens' 1980-86 dome

A fumerole near the 1980-86 dome keeps an open hole in the east arm of Crater Glacier. The hole is approximately 12 m (40 ft) in diameter, easily wide enough to hold a school bus and deep enough so you could not see the bus' top. View to the south.

Monitoring channel erosion and aggradation, Mount St. Helens (North...
August 6, 2013

Monitoring channel erosion and aggradation, Mount St. Helens (North...

Fieldwork includes direct observations of changes to streams and stream beds to determine how changes will affect the downstream transportation of sediments. Here, the braided North Fork Toutle (left) joins Carbonate Springs Creek (right). View to the east.

August 1, 2013

C1 West Transect – 2013

Permanent Site: C1 West Transect; Depth: Meters (Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.14525225,-123.57361291; Site Description: Substrate is entirely sand. All seaweeds are absent. Woody debris is scattered along entire transect (0:21 0:34, 0:59 seconds). Invertebrates are scarce with the

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July 31, 2013

F2 West Transect – 2013

Permanent Site: F2 West Transect; Depth: 12.3 Meters (40.3 Feet); Distance from river mouth: 1.5 Kilometers (0.9 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15672004,-123.55036603; Site Description: Substrate is mainly gravel mixed with a little cobble and an occasional boulder. Only remaining seaweeds are the dead stalks of the perennial

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July 30, 2013

K1 East Transect – 2013

Permanent Site: K1 East Transect; Depth: 6.2 Meters (20.4 Feet) & 6.6 Meters (21.5 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13592923,-123.5101581; Site Description: This is a shallow site. Sediment is a gravel/sand mixture. This video includes footage from surveys conducted both on 

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July 30, 2013

K1 West Transect – 2013

Permanent Site: K1 West Transect; Depth: 5.8 Meters (19 Feet) & 5.6 Meters (18.4 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13592923,-123.51082988; Site Description: This is a shallow site. Sediment is a gravel/sand mixture. This video includes footage from surveys conducted both on 

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July 29, 2013

A2 East Transect – 2013

Permanent Site: A2 East Transect; Depth: 12.8 Meters (Feet 42); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.14130295, -123.58766124; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud. Seaweeds are absent this year. Woody debris is seen on transect for the

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July 23, 2013

H1 East Transect – 2014

Permanent Site: H1 East Transect; Depth: 5.5 Meters (Feet 17.8); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 3 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

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Field Studies at Mount St. Helens...
July 19, 2013

Field Studies at Mount St. Helens

Center for the Study of Active Volcanoes (CSAV) students Javier Pacheco (Costa Rica) and Syegi Kunrat (Indonesia) participate in field studies at Mount St. Helens.

Teachers take a guided walk on the Hummocks Trail at Mount St. Hele...
June 25, 2013

Teachers take a guided walk on the Hummocks Trail at Mount St. Helens

Teachers take a guided walk on the Hummocks Trail, learning about the depositional features of the May 18, 1980 eruption.

Filter Total Items: 372
USGS science for a changing world logo
March 1, 2001

A minor aftershock struck the Seattle area early Thursday morning, March 1, 2001. The aftershock, which struck at 1:10 a.m. local time, had a preliminary magnitude of 3.4 and was felt throughout the Seattle-Tacoma-Olympia area.

USGS
March 1, 2001

A minor aftershock struck the Seattle area early Thursday morning, March 1, 2001. The aftershock, which struck at 1:10 a.m. local time, had a preliminary magnitude of 3.4 and was felt throughout the Seattle-Tacoma-Olympia area.

USGS science for a changing world logo
February 28, 2001

A strong earthquake, with a preliminary magnitude of 6.8, struck near Olympia, Washington, south of Seattle, at 10:55 a.m. PST on February 28, 2001, the U.S. Geological Survey reported.

USGS
February 28, 2001

A strong earthquake, with a preliminary magnitude of 6.8, struck near Olympia, Washington, south of Seattle, at 10:55 a.m. PST on February 28, 2001, the U.S. Geological Survey reported.

USGS science for a changing world logo
January 17, 2001

Metal concentrations were found to be elevated in riverbed sediments and fish tissue samples at sites downstream from significant natural mineral sources associated with hard-rock mining activities in the Clark Fork and Spokane River basins, according to scientists with the U.S. Geological Survey (USGS), Department of the Interior.

USGS
January 17, 2001

Metal concentrations were found to be elevated in riverbed sediments and fish tissue samples at sites downstream from significant natural mineral sources associated with hard-rock mining activities in the Clark Fork and Spokane River basins, according to scientists with the U.S. Geological Survey (USGS), Department of the Interior.

USGS
May 10, 2000

Twenty years ago this month, Mount St. Helens in southern Washington State was building up energy for the cataclysmic eruption that occurred on May 18, 1980.

USGS
April 20, 2000

Harold L. James, longtime geologist with the U.S. Geological Survey and a former Chief Geologist, died April 2 in Bellingham, Washington. He was 87.

USGS
April 13, 2000

Biologists updating 1994 studies of contaminants in upper Columbia River fish--including Lake Roosevelt--have found either decreases or no change in levels of mercury, dioxins and furans, and PCBs, according to a report released today by the U.S. Department of the Interior, U.S. Geological Survey.

USGS
January 24, 2000

On January 26, 1700, the largest earthquake known to have occurred in the "lower 48" United States, rocked Cascadia, a region 600 miles long that includes northern California, Oregon, Washington, and southern British Columbia.

USGS
January 7, 2000

Seattle will keep cool, clean drinking water flowing from the Cedar River Watershed while keeping streams healthy for threatened salmon, with help from a monitoring method developed by the U.S. Geological Survey, Department of the Interior.

USGS
October 4, 1999

Nitrate contamination of ground water from land use activities, especially agricultural activities, is common in many parts of the lower Nooksack River Basin. Fifty-five of the 368 wells sampled for nitrate showed concentrations above the U.S. Environmental Protection Agency and Health Canada drinking water standards, according to a recently published report by the U.S. Geological Survey (USGS).