: Canoes and Kayaks of Western North America . Bill Durham.
نویسندگان
چکیده
منابع مشابه
Realistic evaluation of hull performance for rowing shells, canoes, and kayaks in unsteady flow.
In this study, we investigated the effect of hull dynamics in shallow water on the hydrodynamic performance of rowing shells as well as canoes and kayaks. An approach was developed to generate data in a towing tank using a test rig capable of reproducing realistic speed profiles. The impact of unsteady shallow-water effects on wave-making resistance was examined via experimental measurements on...
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Conservation initiatives to protect and restore valued species and communities in human-dominated landscapes face huge challenges linked to the cost of acquiring habitat. We ask how the sale of forest carbon offsets could reduce land acquisition costs, and how the alternate goals of maximizing α or β-diversity in focal communities could affect the prioritization land parcels over a range of con...
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A simple model using once-daily upper-air values in the NCEP–NCAR reanalysis database estimates seasonal mass balance at two glaciers in southern Alaska, one in western Canada, and one in Washington substantially better than any of several seasonally averaged, large-scale climate indices commonly used. Whereas sea level pressure and sea surface temperature in the Pacific exert a strong influenc...
متن کاملVariability and trends in Mountain Snowpack in Western North America
Snow course and SNOTEL measurements of spring snowpack, corroborated by a physically-based hydrologic model, are examined here for climate-driven fluctuations and trends during the period 1916-2002. Much of the mountain West has experienced declines in spring snowpack, especially since mid-century, and despite increases in winter precipitation in many places. Analysis and modeling shows that cl...
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ژورنال
عنوان ژورنال: American Anthropologist
سال: 1961
ISSN: 0002-7294,1548-1433
DOI: 10.1525/aa.1961.63.6.02a00350