Now showing items 1-5 of 5
The influence of mine waste contamination on invertebrates and fish in the Methow River Valley, Okanogan County, Washington (U.S.A.)
A study of mine-waste contamination effects on Methow River habitat on the eastern slopes of the north Cascade Mountains in Washington state, U.S.A., revealed trace element impacts on invertebrates and fish. Ore deposits in the area were mined for gold, silver, copper and zinc until the early 1950's, but the mines are now ...
Spatial organization, position, and source characteristics of large woody debris in natural systems
Field data were collected from 150 stream sites with a diverse array of channel types and disturbance patterns within basins relatively unaffected by anthropogenic disturbance to assess the characteristics of natural large woody debris (LWD) organization, size, and riparian areas across forested regions of Washington State. ...
Spatial and temporal dynamics of fire and vegetation change in Thunder Creek watershed, North Cascades National Park, Washington
Little is known about the history of fire and vegetation in the North Cascade Range. I conducted two studies in the lower Thunder Creek watershed, North Cascades National Park to evaluate past fire and forest vegetation dynamics. The first study evaluated forest development following a series of fires c. 150 years ago. Tree ...
The fate of canopy water in the Findley Lake basin, WA
This dissertation examined the fate of canopy water in the Findley Lake Basin, WA (47°04' N, 121°25'W) during the growing seasons of 1994 and 1995. Field measurements were taken at three sites: Lake (1170 m), Midslope (1230 m) and Ridge (1320 m). Field data included stand and canopy structure, canopy wetness, fog, and ...
Multilevel planning in forestry
This dissertation is a study of multilevel planning in forestry. Two models are investigated, the holistic model and the compromise model. A sample problem is formulated to demonstrate each model. The holistic model formulates the harvest scheduling problem of maximizing net present value with harvest flow and adjacency ...