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Oregon, elements

What is needed is an alternative approach which permits development of valid cause and effect relationships. This strategy, one involving intensive surveys, is referred to here as mechanistic. The Willamette River, Oregon, USA, is used as a case study to illustrate quantitative, semi-quantitative and qualitative approaches to mechanistic assessment of river water quality using, respectively, dissolved oxygen depletion, erosion/deposition and potentially toxic trace elements as examples. [Pg.260]

The results of map generation cannot be expressed effectively with the format available here. However, the State of Oregon utilized the map and matrix techniques in their nonpoint source evaluation and as a basis for designing more intensive survey approaches to assessing the impact of human activity on river quality. In addition to reflecting deposition of sediments, the methods can be applied to transport of pesticides, nutrients and trace elements since many of these substances tend to adsorb to the organic and inorganic fractions of soil. [Pg.275]

Methods. As discussed in the previous chapter, a number of approaches have been used to assess the presence of potentially toxic trace elements in water. The approaches used in this assessment include comparative media evaluation, a human health and aquatic life guidelines assessment, a mass balance evaluation, probability plots, and toxicity bioassays. Concentrations of trace elements were determined by atomic absorption spectrometry according to standard methods (21,22) by the Oregon State Department of Environmental Quality and the U.S. Geological Survey. [Pg.276]

Comparative Media Evaluation. Table 4 is a summary of trace element occurrences for water, sediment, fish and rocks in Oregon as compared with concentrations measured elsewhere in the world. Details of the comparison parameters are provided in the footnotes to Table 4. The table indicates that no excessively high concentrations of potentially toxic trace elements exist in Willamette River water relative to "uncontaminated sites. [Pg.276]

Table 4. Summary of Trace Element Occurrences for Water, Sediment, Fish and Rocks in Oregon and Elsewhere with Comparisons... Table 4. Summary of Trace Element Occurrences for Water, Sediment, Fish and Rocks in Oregon and Elsewhere with Comparisons...
Based on concentrations of trace elements in rock types found in Oregon 38). [Pg.277]

Table 5. Maximum Concentrations of Selected Trace Elements in Oregon Streams and Related Guidelines and Criteria... Table 5. Maximum Concentrations of Selected Trace Elements in Oregon Streams and Related Guidelines and Criteria...
Table 6. Trace Element Loading to the Willamette River. Oregon USA... Table 6. Trace Element Loading to the Willamette River. Oregon USA...
Table 7. Comparisons of Trace Element Content in Oregon Soil and Rocks with That in Water Cone in Rocks and Soil /xg g Cone, in Oregon Streams, Mean, mg... Table 7. Comparisons of Trace Element Content in Oregon Soil and Rocks with That in Water Cone in Rocks and Soil /xg g Cone, in Oregon Streams, Mean, mg...
Elements Crustal Abundance Mean in Oregon Rock Types Western Surface Soils Total Recoverable uses Mean DEO Max ... [Pg.281]

Richert, D.A. Kennedy, B.C. McKenzie, S.W. Hines, W.G. A Synoptic Survey of Trace Elements in Bottom Sediments of the Willamette River, Oregon. Geol. Survey Circ. 715F, USGS, Reston VA, 1977 1-27. [Pg.286]

Dunnette, D.A. TYace Elements in Oregon Waters - An Environmental Assessment. Oregon Dept, of Environ. Qual., 1983 1-93. [Pg.286]

Watson, J. G., Chemical element balance receptor model methodology for assessing the sources of fine and total suspended particulate matter in Portland, Oregon, PhD Thesis, Oregon Graduate Center, Beaverton, Oregon, 1979. [Pg.188]

Hanson, W.C. 1976. Studies of transuranic elements in Arctic ecosystems. Pages 28-39 in C.E. Cushing (ed.). Radioecology and Energy Resources. Proceedings of the Fourth National Symposium on Radioecology. 12-14 May 1975, Oregon State Univ., Corvallis, OR. Ecol. Soc. Amer., Spec. Publ. No. 1. [Pg.1742]

Watson, J.G., Jr., (1979) "Chemical Element Balance Receptor Model Methodology for Assessing the Sources of Fine and Total Suspended Particulate Matter in Portland, Oregon," Thesis, Ph.D., Department of Chemistry, Oregon Graduate Center, Beaverton, OR. [Pg.19]

Without the benefit of the data base improvement programs, 27 million dollars in Industrial controls would likely have been the key element in a new control strategy yet would have only provided one-third of the reduction required to meet standards. Instead, a more effective mix of point and area source controls will likely be adopted and, at considerably less cost to (and with considerably more effectiveness for) the community. Once the capability is developed, CMB estimates of source Impacts can be used to track the progress of the strategy on a source-class basis using actual air samples, (in addition to emission estimates) to measure the effectiveness of the controls. Oregon s Source Apportionment Program and the Future... [Pg.122]

B. Evans, Assistant Chemist. Rare-Earth Information Center. Energy itnd Mineral Resources Research Institute. Iowa Slate University. Ames. I,A. http //www.cxternal.ameslab.gov/. Cerium Dysprosium Erbium Europium Gadolinium Holmium Lanthanum Lutetium Neodymium Rare-Earth Elements and Metals Praseodymium Samarium Scandium Terbium Thulium Ytterbium and Yttrium Daniel F. Farkas, Oregon State University. Corvallis. OR. http // oregonstate.edu/. Food Processing... [Pg.1839]

Bonn, B.A. (1999) Selected Elements and Organic Chemicals in Bed Sediment and Fish Tissue of the Tualatin River Basin, Oregon, 1992 -96 Water-Resources Investigations Report 99-4107, U.S. Geological Survey, Portland, OR. [Pg.202]

Drake M. J. (1972) The distribution of major and trace elements between plagioclase feldspar and magmatic silicate liquid an experimental study. PhD Thesis, University of Oregon Eugene, Oregon, USA (unpublished). [Pg.1122]

Binary Chemical Weapons Chemical weapons formed from two non-lethal elements (called precursors) through a chemical reaction after the munitions are fired or launched. Binary weapons were manufactured, stored, and transported with only one of the chemical elements in the weapon. The second element was to be loaded into the weapon at the battlefield. As of November 1993, the precursors for the binary chemical weapons are stored at Aberdeen Proving Ground, Maryland Pine Bluff Arsenal, Arkansas Tooele Army Depot, Utah and Umatilla Depot Activity, Oregon. [Pg.73]

Local coupling among excitable elements is realized through diffusive coupling, which introduces spatial degree of freedom in the system. Here we consider the case of an one-dimensional Oregonator system in its three-component version. Thus its local dynamic introduced in subsection 1.2.3, see Eqs, 1.2 has to be supplemented by diffusion terms. As in the experiment with the BZ reaction the catalyst is immobilized in thin gel layer, there is no diffusion in the v variable. This gives... [Pg.26]

Loveland, W. "Hydrospheric Trace Elements and Their Application in Tracing Water Pollutants, Oregon State University Report, WRRI-59, 1978. [Pg.534]


See other pages where Oregon, elements is mentioned: [Pg.246]    [Pg.280]    [Pg.291]    [Pg.121]    [Pg.122]    [Pg.19]    [Pg.1742]    [Pg.76]    [Pg.78]    [Pg.33]    [Pg.61]    [Pg.1545]    [Pg.1788]    [Pg.167]    [Pg.281]    [Pg.369]    [Pg.284]    [Pg.264]    [Pg.8]    [Pg.212]    [Pg.112]    [Pg.141]   
See also in sourсe #XX -- [ Pg.7 , Pg.137 , Pg.144 ]




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