Macrolichen Communities of <em>Quercus garryana</em> in the Puget Trough and Columbia River Gorge Areas of Washington State

The new species, Stenozonium leonardi, the northernmost representative of the Polyzoniidae in western North America and the only one north of the Columbia River, is described from the Olympic Peninsula of Washington; it is isolated by some 180 mi (288 km) from S. benedictae Shelley, 1998, in coastal Oregon. Stenozonium alone among the four polyzoniidan genera in western North America consists of entirely allopatric and widely separated species, with one apiece in California, Oregon, and Washington-evidence that it diversified earlier than its ordinal counterparts.

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Groundwater Remediation of Hexavalent Chromium Along the Columbia River at the Hanford Site in Washington State, USA

ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B ◽

10.1115/icem2011-59030 ◽

2011 ◽

Author(s):

Dyan L. Foss ◽

Briant L. Charboneau

Keyword(s):

Hexavalent Chromium ◽

Groundwater Remediation ◽

Columbia River ◽

Washington State ◽

Department Of Energy ◽

Hanford Site ◽

Pump And Treat ◽

Environmental Setting ◽

Calcium Polysulfide

The U.S. Department of Energy Hanford Site, formerly used for nuclear weapons production, encompasses 1500 square kilometers in southeast Washington State along the Columbia River. A principle threat to the river are the groundwater plumes of hexavalent chromium (Cr(VI)), which affect approximately 9.8 square kilometers, and 4.1 kilometers of shoreline. Cleanup goals are to stop Cr(VI) from entering the river by the end of 2012 and remediate the groundwater plumes to the drinking water standards by the end of 2020. Five groundwater pump-and-treat systems are currently in operation for the remediation of Cr(VI). Since the 1990s, over 13.6 billion L of groundwater have been treated; over 1,435 kg of Cr(VI) have been removed. This paper describes the unique aspects of the site, its environmental setting, hydrogeology, groundwater-river interface, riverine hydraulic effects, remediation activities completed to date, a summary of the current and proposed pump-and-treat operations, the in situ redox manipulation barrier, and the effectiveness of passive barriers, resins, and treatability testing results of calcium polysulfide, biostimulation, and electrocoagulation, currently under evaluation.

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Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA

ICES Journal of Marine Science ◽

10.1093/icesjms/fsm195 ◽

2008 ◽

Vol 65 (5) ◽

pp. 753-758 ◽

Cited By ~ 46

Author(s):

Jeffery R. Cordell ◽

Stephen M. Bollens ◽

Robyn Draheim ◽

Mark Sytsma

Keyword(s):

San Francisco ◽

Native Species ◽

Calanoid Copepod ◽

Puget Sound ◽

Columbia River ◽

Late Summer ◽

River System ◽

Washington State ◽

Cyclopoid Copepod ◽

Snake River

Abstract Cordell, J. R., Bollens, S. M., Draheim, R., and Sytsma, M. 2008. Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA. – ICES Journal of Marine Science, 65: 753–758. Nine Asian copepod species have been introduced into the Northeast Pacific, seven of which are largely confined to the San Francisco estuary. However, several of these copepods recently invaded the Columbia–Snake River system in Washington state, USA. In addition to the calanoid copepod Pseudodiaptomus inopinus, which appeared in the 1980s, the Columbia River now has populations of the calanoids Pseudodiaptomus forbesi and Sinocalanus doerrii, and the cyclopoid copepod Limnoithona tetraspina. Sampling in the Columbia–Snake River system in 2005 and 2006 indicated that (i) newer invaders may have displaced the previously introduced P. inopinus; (ii) P. forbesi had moved upstream into the first five reservoirs in the system; (iii) the other species occurred only in the tidal regions of the lower river; (iv) P. forbesi dominates the late summer holoplankton in the lower river and estuary; and (v) P. forbesi is relatively rare, and the holoplankton is dominated by native species in upstream free-flowing segments of the Columbia River and in reservoirs of the Snake River. Zooplankton samples from ships in Puget Sound suggest that ballast water from California is a major source of the introduced copepods and that the Columbia River itself may be a new source of ballast-introduced copepods.

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Digital representation of the Washington state geologic map: a contribution to the Interior Columbia River Basin Ecosystem Management Project

Open-File Report ◽

10.3133/ofr95684 ◽

1996 ◽

Author(s):

Gary L. Raines ◽

Bruce R. Johnson

Keyword(s):

River Basin ◽

Ecosystem Management ◽

Columbia River ◽

Washington State ◽

Columbia River Basin ◽

Digital Representation ◽

Geologic Map ◽

Management Project

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The geographical distribution of ice worms (O1igochaeta:Enchytraeidae)

Canadian Journal of Zoology ◽

10.1139/z70-233 ◽

1970 ◽

Vol 48 (6) ◽

pp. 1363-1367 ◽

Cited By ~ 19

Author(s):

Michael J. Tynen

Keyword(s):

North America ◽

Geographical Distribution ◽

Columbia River ◽

Washington State ◽

Southern Limit

Ice worms (Mesenchytraeus solifugus (Emery 1898)) have been found on the western coastal glaciers of North America, from the Bagley Icefield in Alaska, to Mt. Rainier, in Washington State. They are absent from the western interior and from the Central Alaska Ranges. It is speculated that their southern limit is north of the Columbia River, since this area represents the probable southern limit of Cordilleran ice.

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Chronology of Missoula Flood Deposits at the Coyote Canyon Mammoth Site, Washington State, USA

Quaternary ◽

10.3390/quat4030020 ◽

2021 ◽

Vol 4 (3) ◽

pp. 20

Author(s):

George V. Last ◽

Tammy M. Rittenour

Keyword(s):

Late Pleistocene ◽

Columbia River ◽

Distal Portion ◽

Washington State ◽

Optically Stimulated Luminescence ◽

Current Understanding ◽

Glacial Lake ◽

Radiocarbon Age ◽

Loess Deposits ◽

Flood Deposits

Late Pleistocene outburst megafloods, mostly from glacial Lake Missoula, hydraulically ponded behind downstream constrictions in the Columbia River in southeastern Washington State, USA. Optically stimulated luminescence (OSL) ages for flood deposits from the Coyote Canyon Mammoth Site, located in a high (315–320 m asl) distal portion of the transient lake, indicate that at least seven floods ponded high enough to inundate the area during the period 20.9 ± 2.6 ka to 16.3 ± 2.8 ka. This is consistent with a radiocarbon age of about 17.4 ± 0.2 ka cal BP from the middle of the flood sequence. OSL ages from loess deposits overlying a paleosol at the top of the flood sequence range from 14.0 ± 2.3 ka to 10.9 ± 2.0 ka, suggesting a hiatus of about 2.3 thousand years. These datasets are consistent with current understanding that multiple late Pleistocene megafloods occurred between 20 ka and 14 ka and that earlier floods produced higher flood stages than later ones. The lack of flood deposits in the Coyote Canyon area younger than 16 ka supports the hypothesis that younger megafloods did not hydraulically pond in the Pasco Basin above about 230 m asl.

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