Jun 13, 2013 · At Muskeg Cirque, Lituya Bay (Mann, 1983), western hemlock increases about 7950 cal yr BP (7100 14 C yr BP) and pine expansion takes place after an earlier disappearance. Sedimentation rates also increase in the core, suggesting muskeg …

Tundra vegetation grades into somewhat more substantial taiga and boreal forestplant communities in the lower Koyukuk. The Koyukuk Flats are a low-gradient, poorly drained muskeg environment with seasonally abundant populations of sedges and other herbaceous species. In the higher-gradient floodplains of the Koyukuk River, mountain alder and ...

Sep 10, 2015 · Muskeg has a high initial void ratio, with high compressibility. The compression index C c varies from 3.05 to 3.70, and the swelling index C s ranges 0.24 to 0.45 with fiber orientation. Furthermore, muskeg has high initial permeability. The permeability of muskeg is 10 to 1000 times the permeability of fine-grained soils.

Dec 1, 1979 · Journal of Terramechanics, 1979, Vol. 16, No. 4, pp. 163 to 180 0022-4898/79/0201-0163 $02. 00/0 Pergamon Press Ltd. Printed in Great Britain International Society for Terrain Vehicle Systems CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MUSKEG WITH SPECIAL REFERENCE TO VEHICLE MOBILITY J. Y. WONG,* M. …

Sep 10, 2015 · Muskeg (organic terrain) implies extensive beds of peat saturated with water or heavily charged with ice, in western Canada or Alaska. Typically, muskeg consists of a living organic mat of mosses, sedges or grasses, and dead plants in states of decomposition (Radforth, 1969, Massah and Noorolahi, 2010, Kroetsch et al., 2011).

Jun 1, 1982 · MECHANICAL PROPERTIES OF MUSKEG 123 proposed previously, the shear stress-displacement relationship for the internal shearing of the muskeg mat may be described by the following equation r = rm.~ (ej/Kw) exp(-j/Kw) (6) where r andj are shear stress and shear displacement, respectively, rm,~ is the maximum shear stress, e is 2.7183 and K~. is a ...

Dec 1, 1979 · Results of measurement of the load-sinkage and shearing characteristics of a muskeg in the Ottawa area, Ontario are presented. Mathematical models for the bearing capacity and shearing characteristics of muskeg are proposed. Methods for predicting the punching load, critical sinkage and shear strength of muskeg are suggested.

Mar 1, 2010 · Muskeg vegetation covers about 9% (47 km 2) of Mitkof Island, mostly in poorly drained lowlands (U.S. Dept. of Agriculture Forest Service, 1994). Muskegs are peat lands with bog and fen communities composed primarily of sedges ( Carex, Eriophorum ), heaths (e.g., Empetrum , Vaccinium , Ledum , and Kalmia ) and mosses ( Racomitrium, Sphagnum spp.).

Dec 1, 2016 · The Muskeg River basin is located in the Athabasca Oil-Sands region of northern Alberta, where it receives 460 mm of mean annual precipitation (Environment Canada, 2005). Draining an area of 1460 km 2 , it is dominated by peatland …

Nov 20, 2022 · In addition, the Muskeg River is relatively shallow and wide, usually <1.5 m deep, so the contributions of photolysis and volatilization are relatively substantial. In deeper rivers, direct photolysis and volatilization will be less critical for modeling in-stream PAH fate processes.