The study was concerned with lodgepole pine, Pinus contorta Douglas and Engelmann spruce, Picea engelmannii Parry, particularly in the southern interior of British Columbia. Classifications of the forests of the Province as well as distribution, silvics, effects of fire upon succession, forest associations, and productivity classes of the two species were described. Sample plots were located in the Interior Douglas-fir and Engelmann Spruce - Alpine Fir Biogeoclimatic Zones. Hohenadl's form factor was used to compute volume growth by individual decades from stem analyses. On 124 plots, 137 trees were collected for stem analyses, 108 saplings were used for height - age studies, 100 point samples were made for determining basal area and stand volume and several hundred heights as well as diameters and borings at breast height, were taken. Thirty-four stand variables were subjected to multiple correlation analyses, particularly in regard to forest associations and growth of height, diameter at breast height and volume of the two species. Simple regressions were used to estimate height growth of several species on similar sites, and to compare several methods of volume calculation. Trees of the same diameter at breast height grown in different competitive positions (open, moderate to dense, and suppressed), contained different volumes. The largest volume of individual trees was found with trees grown in moderate to dense competitive position. Individual young lodgepole pines had a faster increment of height, diameter at breast height, and volume, than Engelmann spruces. This trend remained the same in yield tables based on individual tree studies and constructed for stands of good (average site index 100 ft. at 100 years), medium (average site index 70 ft. at 100 years), and poor (average site index 50 ft. at 100 years) productivity classes. The mean annual increment of volume of stands culminated earlier in lodgepole pine than in Engelmann spruce. The periods required were (in brackets are shown attained average diameters at breast height, total heights and volumes per acre). In the good productivity class in lodgepole pine 40 years (8.3 in., 58 ft., 6,700 cu.ft.) and in Engelmann spruce 75 years (10.0 in., 80 ft., 6,000 cu.ft.); in the medium productivity class in lodgepole pine 60 years (6.5 in., 50 ft., 4,600 cu.ft.) and in Engelmann spruce 130 years (9.0 in., 84 ft., 5,100 cu.ft.); in the poor productivity class in lodgepole pine 85 years (5.3 in., 45 ft., 3,100 cu.ft.) and in Engelmann spruce 150 years (6.3 in., 66 ft., 3,400 cu.ft.). Yield table volumes per acre in lodgepole pine were larger than those of Engelmann spruce, in the good productivity class, to the age of 120 years, in the medium productivity class to 150 years, and in the poor productivity class for an undetermined period. Present and suggested future trends of utilization and management of stands of the two species were reviewed. Generally, forest management in British Columbia shows a trend toward more intensive forest utilization, due to the increasing demand for wood. Smaller diameter trees and "smallwood" stands will be more and more frequently utilized. Utilization of whole trees, highly mechanized "harvesting" and transportation as well as intensified management of forest stands will compensate for increasing costs due to utilization of smaller diameters. Under intensive management, lodgepole pine deserves special consideration. It is as well-suited for artificial establishment of stands by planting as Engelmann spruce, but should cost less. Its value for the woodworking industry is similar to that of Engelmann spruce. However, on a rotation of maximal mean annual increment, its volume yield per acre unit will be higher than that of Engelmann spruce, and it should yield a higher rate of return on invested capital. / Forestry, Faculty of / Graduate

The patterns and rates of forest regeneration on a critical wildlife winter range on the floor of the trench, known locally as Premier Ridge were examined in this study. A nearby western wall of the trench was also investigated to ascertain the effect of elevation on forest regeneration and understory productivity. Forest regeneration in a community which has remained unforested for several as years has pronounced effects on the floristic dynamics and productivity of the understory. On Premier Ridge the greatest floristic change was a rapid increase in pinegrass and a. corresponding decrease in the abundance of all other grass species as the forest regeneration progressed. Forbs varied widely in abundance while shrubs were slower to react to changes in the overstory. Similar trends were observed on Estella Mountain. Productivity of the grass component on the unforested sites was four times that of the forested sites. The production of forbs and some species of shrubs also declined as forest regrowth began. One species, bearberry, increased under light forest canopies. The reduction in productivity and the changes in species composition of-the understory which occur in regenerating forest communities, appear to be detrimental to foraging populations of wild and domestic ungulates. Cattle seem to prefer to graze the open, unforested areas, and as regeneration proceeds, the acreage which they will readily use diminishes. Since there have been few reductions in stock numbers to compensate for this range shrinkage, local overgrazing has become more widespread. The regrowth of the forest reduces the grass, both in terms of quality and quantity. This is the most important component in the diet of cattle and most of the wildlife species using the Premier Ridge area. In addition, bitterbrush, used in the summer by cattle and during the winter by big game species, is quickly eliminated by forest regeneration. Bearberry, which may be used by wildlife to some extent, increases under forest cover. This component does not approach in value or usefulness, the losses that the other components represent to grazing animals. The trees of the south and southwestern aspects are characterized by relatively slow growth rates. Forage production on these slopes is modest; if grazing animals are deemed desirable in the future economy of the East Kootenay, these areas should remain treeless. Growth rates are more favourable on the north and northeast aspects, which are less frequently used as foraging areas by winter wildlife, but may be used as shelter or bedding areas. / Land and Food Systems, Faculty of / Graduate

I offer some tentative thoughts on Sto:lo relations with the forest and, in turn, suggest how those relations may inform Sto:lo views on identity and culture. While highlighting the variety and complexity of Sto:lo attitudes toward the forest, I pay particular attention to those that appear contradictory. In so doing, I suggest that such "contradictions" are instead necessary antagonisms that spring from the constantly changing pressures to which the Sto:lo have been subjected, as well as from the ways in which they have struggled to cope with such pressures. More specifically, in pointing to Sto:lo attitudes towards forest work and forest conservation, I suggest that the Sto:lo have been forced and even encouraged to make claims to their identity that do not, and need not, conform with what is considered "traditional." In this way, my discussion is structured around the relationship between a sense of Sto:lo identity and the notion of cultural continuity, while aimed at highlighting the material as well as the intellectual realities behind that relationship. In a broader context, my discussion is aimed at reinforcing the need for more flexible examinations of Native identity; those that will highlight what it means to live in a modern Native culture, and what it means to be vulnerable to power. / Arts, Faculty of / Geography, Department of / Graduate

Increasing demands for the natural resources of British Columbia coastal forests have led to conflicts between resource users. In addition recent demand for intangible "non-economic" resources, such as outdoor recreation is creating added pressure upon the wildland resource base. The British Columbia Forest Service, although restricted to some extent by a narrowly-worded "wood production" statute, has attempted to resolve forest resource conflicts by administrative action such as the development of new contract provisions and logging guidelines. These alternatives can be effectively enforced against Crown licensees due to Crown control of most timber resources, but they are largely ineffective for the regulation of private timberland operations. Although private lands are not extensive, their harvest is substantial and they comprise a significant acreage in the rich coastal forest areas. The common law offers several potential causes of action which might be employed by the Forest Service to regulate logging operations on private timberlands, particularly with respect to impact upon fishery resources in coastal forest streams. The Forest Act could also be interpreted to authorize regulation of private logging operations. Litigation, whether civil or criminal, however, is not an optimum method of environmental management. It is expensive, time-consuming, extremely technical and remedies are generally post facto in character. / Law, Peter A. Allard School of / Graduate

The purpose of this research was to quantify what value could be gained from cutting solid wood products from old-growth western hemlock (Tsuga heterophylla (Raf.) Sarg.) logs that are used to produce pulp in British Columbia. These logs represent a significant portion of the resource and increasing their value recovery would be beneficial to the forest industry. One hundred and sixteen logs were sampled from the coastal and interior regions of British Columbia. Dimension and quality attributes were measured to enable estimates of gross and merchantable volume. Logs deemed likely to yield lumber were sawn with the aim of maximizing value recovery. The nominal dimension and grade of all lumber recovered was recorded. Margins and breakpoints at which sawing became profitable were calculated. Models to predict the volume of lumber and proportion of Clear grade lumber recovered (“C Industrial” grade at the interior mill, “D Select” grade at the coastal mill) were developed. Lumber recovery, especially Clear grade lumber, was significantly higher from logs from the coastal site. At current market prices, cutting lumber from these logs was profitable, with the highest margins achieved when chips were produced from the milling residue. It was not profitable to recover lumber from the interior logs regardless of whether chips were produced. The disparity between locations was attributed to differences between the logs, the sawmilling equipment, the sawyers’ motivations and the lumber grades. Between 60% and 67% of coastal logs and 13% to 21% of interior logs returned a profit, depending on whether chips were produced. Models were developed to better identify these logs using observable attributes. A linear model described the total volume of lumber recovered. Significant predictor variables in the model were the gross log volume, the average width of the sound collar and the stage of butt/heart rot at the large end. A second model predicted the proportion of Clear grade lumber. Regional models were developed to account for different Clear lumber grades between sawmills. Significant predictor variables were knot frequency, diameter at the large end, volume, length, taper and the width of the sound collar at the large end.

In Vancouver, British Columbia, Canada, issues once thought isolated to large metropolitan areas such as Los Angeles, Tokyo, and Mexico City—increased storm water runoff, the urban heat island effect, deterioration of air and water quality, and loss of habitat and biodiversity—now threaten a region once described as "lotus-land" (Wynn and Oke, 1992, xi). European research supports the ability of green roofs to mitigate many of these ill effects of urbanization. The investigation undertaken by this thesis explores the role green roofs might play in the Greater Vancouver's transition to sustainable design and development. The thesis limits the scope of its investigation to inaccessible, extensive systems, alternately known as eco-roofs, which are relatively lightweight and low-maintenance. The paper reviews the historical and contemporary development of eco-roofs, including past and present motivations for their use and the evolution of construction methods. It then summarizes the potential impacts—aesthetic improvements, increased biodiversity, protection of the roof membrane, meso and microclimate mitigation, improved building insulation, and stormwater management—currently attributed to green roof implementation. The remainder of the thesis evaluates which of these potential impacts apply to Vancouver, in light of the city's physical contextual setting, and the ambient influences of the Greater Regional District The reported benefits of green roofs are numerous, and incremental contributions to improving environmental conditions should not be discounted or trivialized, however, in Vancouver and its region, eco-roofs' greatest impact, and consequently financial feasibility, resides in the mitigation of stormwater volumes. Eco-roofs' detain rainfall and slow runoff from the roof during and immediately following a storm event. This reduces peak flows, and corresponding CSO and flooding problems, and encourages a more natural hydrology by increasing the chances for stormwater infiltration. Storm runoff, and issues related to it, constitutes a persistent and growing problem in the GVRD. The ability of an eco-roofs even thin profile to mitigate this pressing issue could result in widespread, and even unforeseen, positive ramifications.

The purpose of this research was to quantify what value could be gained from cutting solid wood products from old-growth western hemlock (Tsuga heterophylla (Raf.) Sarg.) logs that are used to produce pulp in British Columbia. These logs represent a significant portion of the resource and increasing their value recovery would be beneficial to the forest industry. One hundred and sixteen logs were sampled from the coastal and interior regions of British Columbia. Dimension and quality attributes were measured to enable estimates of gross and merchantable volume. Logs deemed likely to yield lumber were sawn with the aim of maximizing value recovery. The nominal dimension and grade of all lumber recovered was recorded. Margins and breakpoints at which sawing became profitable were calculated. Models to predict the volume of lumber and proportion of Clear grade lumber recovered (“C Industrial” grade at the interior mill, “D Select” grade at the coastal mill) were developed. Lumber recovery, especially Clear grade lumber, was significantly higher from logs from the coastal site. At current market prices, cutting lumber from these logs was profitable, with the highest margins achieved when chips were produced from the milling residue. It was not profitable to recover lumber from the interior logs regardless of whether chips were produced. The disparity between locations was attributed to differences between the logs, the sawmilling equipment, the sawyers’ motivations and the lumber grades. Between 60% and 67% of coastal logs and 13% to 21% of interior logs returned a profit, depending on whether chips were produced. Models were developed to better identify these logs using observable attributes. A linear model described the total volume of lumber recovered. Significant predictor variables in the model were the gross log volume, the average width of the sound collar and the stage of butt/heart rot at the large end. A second model predicted the proportion of Clear grade lumber. Regional models were developed to account for different Clear lumber grades between sawmills. Significant predictor variables were knot frequency, diameter at the large end, volume, length, taper and the width of the sound collar at the large end.

Forest disturbances significantly affect snowmelt dominated watersheds. Given that snowmelt from mountain regions provides up to 80% of the annual stream ow in the North American west, disturbances in these watersheds will impact water availability for downstream users. This study used eld data from stand-scale studies to represent forest disturbances in a hydrological model in order to quantify the potential snow hydrology response to varying spatial extent of disturbance. The sensitivity of snow accumulation and ablation response increased with disturbance severity and extent of disturbance. Results may provide water resource management with a greater understanding of the potential impact on post-disturbance snowmelt runo ff. / xii, 135 leaves : ill. ; 29 cm

The purpose of this research was to quantify what value could be gained from cutting solid wood products from old-growth western hemlock (Tsuga heterophylla (Raf.) Sarg.) logs that are used to produce pulp in British Columbia. These logs represent a significant portion of the resource and increasing their value recovery would be beneficial to the forest industry. One hundred and sixteen logs were sampled from the coastal and interior regions of British Columbia. Dimension and quality attributes were measured to enable estimates of gross and merchantable volume. Logs deemed likely to yield lumber were sawn with the aim of maximizing value recovery. The nominal dimension and grade of all lumber recovered was recorded. Margins and breakpoints at which sawing became profitable were calculated. Models to predict the volume of lumber and proportion of Clear grade lumber recovered (“C Industrial” grade at the interior mill, “D Select” grade at the coastal mill) were developed. Lumber recovery, especially Clear grade lumber, was significantly higher from logs from the coastal site. At current market prices, cutting lumber from these logs was profitable, with the highest margins achieved when chips were produced from the milling residue. It was not profitable to recover lumber from the interior logs regardless of whether chips were produced. The disparity between locations was attributed to differences between the logs, the sawmilling equipment, the sawyers’ motivations and the lumber grades. Between 60% and 67% of coastal logs and 13% to 21% of interior logs returned a profit, depending on whether chips were produced. Models were developed to better identify these logs using observable attributes. A linear model described the total volume of lumber recovered. Significant predictor variables in the model were the gross log volume, the average width of the sound collar and the stage of butt/heart rot at the large end. A second model predicted the proportion of Clear grade lumber. Regional models were developed to account for different Clear lumber grades between sawmills. Significant predictor variables were knot frequency, diameter at the large end, volume, length, taper and the width of the sound collar at the large end. / Forestry, Faculty of / Graduate

The forest industry is the most important economic activity in the Province of British Columbia, with half the families in the province depending directly or indirectly on the industry's $400 million annual payroll. Predictions of $1 billion worth of new capital investment materializing within the next five years provide a firm indication that the industry will retain this position of economic importance throughout the forseeable future. The growth of the forest industry has had a profound effect upon the settlement pattern of British Columbia, characterized principally by an extreme concentration of productive facilities, and hence of population, in the south-west of the province, and a thin diffusion of employment and population throughout the remainder. In this large hinterland the population is scattered throughout a myriad of camps, company towns and isolated settlements which are able to provide for their residents a minimum level of goods and services and a narrow range of opportunities for personal development and self-realization. Thus, for many thousands of workers and their families, employment in the forest industry involves denial of the opportunity to participate fully in the prosperous and variegated way of life which the industry has so materially assisted to create within the province. The Provincial Government has, to some extent, indicated an awareness of this condition, for the two declared objectives of its forest policies are the assurance of a perpetual yield of timber, and the establishment of prosperous permanent communities. Policies to ensure the fulfillment of the first objective have been thoroughly prepared, and conscientiously and competently applied. Policies to ensure the fulfillment of the second objective, on the other hand, are still lacking. The anticipated wave of new investment in the industry will produce significant changes in provincial settlement patterns, in the form of several new towns in hitherto undeveloped areas and of a re-structuring of communities in already established areas. If controlled by firm government policy, these changes could be directed toward the creation of a settlement pattern which would make available to the citizens of the province the highest level of goods, services and urban amenities which the province is capable of providing. In order to achieve this objective the developmental activities of the forest industry would have to be coordinated with those of all other agencies, both public and private, which are engendering urbanization within the province. Such coordination could only be achieved by the creation of a framework for developmental planning which would be province wide in scope, comprehensive enough to embrace all developmental action, and capable of accounting for regional variations. By establishing a Provincial Development Department at Cabinet level, with the portfolio being held by the Provincial Premier, a means would be provided for effectively initiating and controlling development on a comprehensive province wide basis. By establishing regional branch offices of the Provincial Development Department a means would be provided for the achievement of regional accountability. It would, be the responsibility of the Regional Development Offices to prepare regional development plans for the areas under their jurisdiction. Coordination of activity at the regional level would be assured through the establishment of a Regional Inter-departmental Committee consisting of the regional representatives of all government departments functioning within the region. By bringing the regional representative of the British Columbia Forest Service into the Regional Inter-departmental Committee, and by making all forestry development subject to the Regional Development Plans, developments within, the forest industry could be directed and controlled so as to make the maximum possible contribution to the realization of an optimum settlement pattern within each region. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate