19 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Ecology"  
Results: 1 - 19
open access

Active layer hydrology for Imnavait Creek, Toolik, Alaska

Description: The hydrology of the active layer of a watershed is described. In the annual hydrologic cycle, snowmelt is the most significant event at Imnavait Creek located near Toolik Lake, Alaska. Precipitation that has accumulated for more than 6 months on the surface melts in a relatively short period of 7 to 10 days once sustained melting occurs. Significant runoff events are few. Convective storms covering relatively small areas on the North Slope of Alaska can produce significant small-scale events i… more
Date: April 1, 1987
Creator: Hinzman, L.D. & Kane, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wildlife Protection, Mitigation, and Enhancement Plans, Anderson Ranch and Black Canyon Facilities: Final Report.

Description: Under direction of the Pacific Northwest Electric Power Planning and Conservation Act of 1980, and the subsequent Northwest Power Planning Council's Columbia River Basin Fish and Wildlife Program, projects have been developed in Idaho to mitigate the impacts to wildlife habitat and production due to the development and operation of the Anderson Ranch and Black Canyon Facilities (i.e., dam, power plant, and reservoir areas). The Anderson Ranch Facility covered about 4812 acres of wildlife habita… more
Date: June 1, 1987
Creator: Meuleman, G. Allyn
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kokanee Stock Status and Contribution of Cabinet Gorge Hatchery, Lake Pend Oreille, Idaho, 1986 Annual Progress Report.

Description: Estimated kokanee (Oncorhynchus nerka) abundance in Lake Pend Oreille was 4.3 million during September 1986. This estimate was similar to 1985 and indicates continued suppression of the kokanee population since initial decline in the late 1960s. Atypically high survival of wild fry resulted in similar fry recruitment in 1986 as 1985, whereas hatchery-reared fry contributed only 8% to total fry recruitment as a result of low post-release survival (3%). Fry released into the Clark Fork River from… more
Date: February 1, 1987
Creator: Bowles, Edward C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing the benefits of OHER (Office of Health and Environmental Research) research: Three case studies

Description: This research was undertaken to estimate the societal benefits and costs of selected past research performed for the Office of Health and Environmental Research (OHER) of the US Department of Energy (DOE). Three case studies of representative OHER and DOE research were performed. One of these, the acid rain case study, includes research conducted elsewhere in DOE. The other two cases were the OHER marine research program and the development of high-purity germanium that is used in radiation det… more
Date: September 1, 1987
Creator: Nesse, R. J.; Callaway, J. M.; Englin, J. E.; Klan, M. S.; Nicholls, A. K. & Serot, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pacific Northwest Laboratory: Annual report for 1986 to the DOE Office of Energy Research: Part 2, Environmental sciences

Description: This report summarizes progress in environmental sciences research conducted by Pacific Northwest Laboratory (PNL) for the Office of Health and Environmental Research in FY 1986. The program is focused on terrestrial, subsurface, and coastal marine systems, and this research forms the basis, in conjunction with remote sensing, for definition and quantification of processes leading to impacts at the global level. This report is organized into sections devoted to Detection and Management of Chang… more
Date: September 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Genetic algorithms and classifier systems: Foundations and future directions

Description: Theoretical questions about classifier systems, with rare exceptions, apply equally to other adaptive nonlinear networks (ANNs) such as the connectionist models of cognitive psychology, the immune system, economic systems, ecologies, and genetic systems. This paper discusses pervasive properties of ANNs and the kinds of mathematics relevant to questions about these properties. It discusses relevant functional extensions of the basic classifier system and extensions of the extant mathematical th… more
Date: January 1, 1987
Creator: Holland, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Further ecological and shoreline stability reconnaissance surveys of Back Island, Behm Canal, Southeast Alaska

Description: A diver reconnaissance of the intertidal and subtidal zones of Back Island was performed to catalog potentially vulnerable shellfish, other invertebrates, and marine plant resources occurring at three proposed alternate pier sites on the west side of Back Island. Additionally, a limited survey of terrestrial vegetation was conducted in the vicinity of one of the proposed alternate pier sites to describe the littoral community and to list the dominant plant species found there. Finally, a reconn… more
Date: September 1, 1987
Creator: Young, J. S.; Strand, J. A. & Ecker, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plan for addressing issues relating to oil shale plant siting

Description: The Western Research Institute plan for addressing oil shale plant siting methodology calls for identifying the available resources such as oil shale, water, topography and transportation, and human resources. Restrictions on development are addressed: land ownership, land use, water rights, environment, socioeconomics, culture, health and safety, and other institutional restrictions. Descriptions of the technologies for development of oil shale resources are included. The impacts of oil shale … more
Date: September 1, 1987
Creator: Noridin, J. S.; Donovan, R.; Trudell, L.; Dean, J.; Blevins, A.; Harrington, L. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ORNL trends and balances, 1987-1992

Description: A brief overview is given that covers the roles, organization, R and D sponsors, and recent achievements of Oak Ridge National Laboratory. Current R and D programs are described in the areas of nuclear and engineering technologies, advanced energy systems, biomedical and environmental sciences, and basic physical sciences. ORNL's future activities are discussed. (LEW)
Date: January 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental surveillance data report for the fourth quarter of 1986

Description: The Department of Environmental Management (DEM) within the Environmental and Occupational Safety Division (E and OS) at the Oak Ridge National Laboratory (ORNL) is responsible for environmental surveillance to: (1) assure compliance with all Federal, State, and DOE requirements for the prevention, control, and abatement of environmental pollution; (2) monitor the adequacy of containment and effluent controls; and (3) assess impacts of releases from ORNL facilities on the environment. To comply… more
Date: March 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Study to Determine the Biological Feasability of a New Fish Tagging System : Annual Report, 1986-1987.

Description: In 1983, a multi-year project to evaluate the technical and biological feasibility of adapting a new identification system to salmonids was established. The system is based upon a miniaturized passive integrated transponder (PIT) tag. This report discusses the work completed and is divided into laboratory studies, field studies, and systems development. All studies were conducted using a glass-encapsulated tag implanted into the body cavity of test fish via a 12-gauge hypodermic needle. Laborat… more
Date: December 1, 1987
Creator: Prentice, Earl F. & Flagg, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of the Cabinet Gorge Kokanee Hatchery on Wintering Bald Eagles in the Lower Clark Fork River and Lake Pend, Oreille, Idaho: 1986 Final Report.

Description: The abundance and distribution of bald eagles (Haliaeetus leucocephalus) on the lower Clark Fork River, Lake Pend Oreille, and the upper Pend Oreille River, Idaho, were documented during the winters of 1985--86 and 1986--87. Peak counts of bald eagles in weekly aerial censuses were higher in 1985--86 (274) and 1986--87 (429) than previously recorded in mid-winter surveys. Differences in eagle distribution within and between years were apparently responses to changes in prey availability. Eight … more
Date: December 1, 1987
Creator: Crenshaw, John G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compilation of selected marine radioecological data for the US Subseabed Program: Summaries of available radioecological concentration factors and biological half-lives

Description: The US Subseabed Disposal Program has compiled an extensive concentration factor and biological half-life data base from the international marine radioecological literature. A microcomputer-based data management system has been implemented to provide statistical and graphic summaries of these data. The data base is constructed in a manner which allows subsets to be sorted using a number of interstudy variables such as organism category, tissue/organ category, geographic location (for in situ st… more
Date: April 1, 1987
Creator: Gomez, L. S.; Marietta, M. G. & Jackson, D. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Active layer hydrology for Imnavait Creek, Toolik, Alaska

Description: The hydrology of the active layer of a watershed is described. In the annual hydrologic cycle, snowmelt is the most significant event at Imnavait Creek located near Toolik Lake, Alaska. Precipitation that has accumulated for more than 6 months on the surface melts in a relatively short period of 7 to 10 days once sustained melting occurs. Significant runoff events are few. Convective storms covering relatively small areas on the North Slope of Alaska can produce significant small-scale events i… more
Date: April 1, 1987
Creator: Hinzman, L. D. & Kane, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Major vegetation types, climatological data, and solar radiation calculations for Colorado's Brush Creek valley

Description: In this report we present information on the vegetative cover, climate, and solar radiation for the Brush Creek valley. A brief vegetative survey was made on October 3, 1984, to identify the vegetation types in the lowest 8 km of the valley; the reader is cautioned that this included only a small part of the Brush Creek valley. The intent was to identify the principal vegetation types, with no attempt to use available scientific sampling techniques to determine accurate relative frequencies of … more
Date: April 1, 1987
Creator: Whiteman, C. D.; Lambeth, R. & Allwine, K. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Eutrophication Potential of Reclaimed Wastewater: An Ecological Study of Water Reuse in an Urban Texas Reservoir

Description: This study determined effects of addition of secondarily treated municipal wastewater effluent on an urban reservoir receiving system. Monthly water quality monitoring of the receiving reservoir and the wastewater, chemical analysis, and monthly laboratory algal assays, were conducted from September 1984 to September 1985. The nutrient status and algal growth potential of the receiving water and the wastewater confirmed the biostimulatory properties of the wastewater. Field validation studies w… more
Date: May 1987
Creator: Dodson, Susan Boyd
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Effects of Flow and Spill on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservior : Annual Report 1987.

Description: Juvenile fall chinook salmon, Oncorhynchus tshawytscha, were freeze branded, coded wire tagged, and released into the Columbia River in the tailrace below McNary Dam during the summers of 1981--1983. The objectives of the study were to examine the effects of river flow on the passage time and migrational behavior of the juveniles and to subsequently assess any relationship to adult survival. This report details adult recovery data to June 1987. 2 refs., 11 tabs.
Date: December 1, 1987
Creator: Miller, David R. & Glorgi, Albert E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen