scholarly journals Stream-sediment geochemistry in mining-impacted streams: Prichard, Eagle, and Beaver creeks, northern Coeur d'Alene Mining District, northern Idaho

2005 ◽  
Author(s):  
Stephen E. Box ◽  
John C. Wallis ◽  
Paul H. Briggs ◽  
Zoe Ann Brown
Keyword(s):  
Stream Sediment ◽  
Sediment Geochemistry ◽  
Mining District ◽  
Coeur D'alene ◽  
Northern Idaho

Western white pine development in relation to biophysical characteristics across different spatial scales in the Coeur d'Alene River basin in northern Idaho, U.S.A.

2002 ◽  
Vol 32 (7) ◽  
pp. 1109-1125 ◽  
Author(s):  
Theresa B Jain ◽  
Russell T Graham ◽  
Penelope Morgan
Keyword(s):  
River Basin ◽  
Spatial Scales ◽  
Pinus Monticola ◽  
White Pine ◽  
Basal Diameter ◽  
Landscape Characteristics ◽  
Coeur D'alene ◽  
Biophysical Factors ◽  
Western White Pine ◽  
Northern Idaho

Many studies have assessed tree development beneath canopies in forest ecosystems, but results are seldom placed within the context of broad-scale biophysical factors. Mapped landscape characteristics for three watersheds, located within the Coeur d'Alene River basin in northern Idaho, were integrated to create a spatial hierarchy reflecting biophysical factors that influence western white pine (Pinus monticola Dougl. ex D. Don) development under a range of canopy openings. The hierarchy included canopy opening, landtype, geological feature, and weathering. Interactions and individual-scale contributions were identified using stepwise log–linear regression. The resulting models explained 68% of the variation for estimating western white pine basal diameter and 64% for estimating height. Interactions among spatial scales explained up to 13% of this variation and better described vegetation response than any single spatial scale. A hierarchical approach based on biophysical attributes is an excellent method for studying plant and environment interactions.

scholarly journals Gold grade variation and stream sediment geochemistry of the Vaimba-Lidi drainage system, northern Cameroon (West Africa)

2013 ◽  
Vol 05 (02) ◽  
pp. 282-290 ◽  
Author(s):  
Victor F. Embui ◽  
Benjamin O. Omang ◽  
Vivian B. Che ◽  
Melvin T. Nforba ◽  
Emmanuel C. Suh
Keyword(s):  
West Africa ◽  
Drainage System ◽  
Stream Sediment ◽  
Sediment Geochemistry ◽  
Northern Cameroon ◽  
Gold Grade
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