336 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Watersheds"

open access

Development of a procedure to estimate runoff and sediment transport in ephemeral streams

A distributed hydrologic model for application on small, semiarid watersheds is developed. The distributed model incorporates simplified routing schemes to include the influence of transmission losses on runoff. A sediment transport model, by sediment size fractions, is developed to compute transport capacity and sediment yield in noncohesive, alluvial channels. Based on available information published in soils and topographic maps and on channel and bed sediment characteristics, the procedure … more

Date: January 1, 1982

Creator: Lane, L.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Walker Branch Watershed: site description and research scope

Walker Branch Watershed is located on the Oak Ridge Reservation in the Ridge and Valley section of Tennessee. The watershed (97 ha consisting of 2 subwatersheds) is underlain by Knox Dolomite; soils formed over the dolomitic substrate are deep, well-drained Typic Paleudults. The watershed is forested. The overstory is predominantly oak-hickory with lesser amounts of pine and mesic hardwoods. The Walker Branch Watershed Project was initiated in 1967 to: relate the productivity and water quality … more

Date: January 1, 1977

Creator: Harris, W. F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Annual hydrologic data summary for the White Oak Creek Watershed: Water Year 1990 (October 1989--September 1990)

This report summarizes, for the Water Year 1990 (October 1989-- September 1990), the dynamic hydrologic data collected on the Whiteoak Creek (WOC) Watershed's surface and subsurface flow systems. These systems affect the quality or quantity of surface water and groundwater. The collection of hydrologic data is one component of numerous, ongoing Oak Ridge National Laboratory (ORNL) environmental studies and monitoring programs and is intended to 1. characterize the quantity and quality of water … more

Date: September 1, 1991

Creator: Borders, D. M.; Gregory, S. M.; Clapp, R. B.; Frederick, B. J.; Moore, G. K.; Watts, J. A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The new definitive map of White Oak Lake

A map of White Oak Lake was drawn from points on the shoreline established with the use of an electronic distance-measuring theodolite and a hand-held reflecting prism. Average water depths were determined along six transects. A planimeter was used to estimate the area of each section. The volume of each section was determined by multiplying the surface area by the average depth. The total area and volume of White Oak Lake were estimated to be 6.88 ha (17.0 acres) and 43,893 m{sup 3}(1,546,330 … more

Date: October 1, 1991

Creator: Cox, D. K.; Farrow, N. D.; Kyker, W. C.; Faulkner, M. A. & Stubbs, L. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Active layer hydrology for Imnavait Creek, Toolik, Alaska

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: Report

Partner: UNT Libraries Government Documents Department

open access

Arctic hydrology and meteorology

The behavior of arctic ecosystems is directly related to the ongoing physical processes of heat and mass transfer. Furthermore, this system undergoes very large fluctuations in the surface energy balance. The buffering effect of both snow and the surface organic soils can be seen by looking at the surface and 40 cm soil temperatures. The active layer, that surface zone above the permafrost table, is either continually freezing or thawing. A large percentage of energy into and out of a watershed… more

Date: January 1, 1988

Creator: Kane, D.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Limnological aspects of acid precipitation

Lakes and streams in parts of Norway, Sweden, Canada, and the United States are being severely impacted by acidic precipitation. Scientists meeting at Sagamore, New York, agreed that this is the most serious limnological problem today. The factor responsible for determining the sensitivity of surface waters to acidification is alkalinity derived by weathering of soils and bedrock in the watershed. Acidification, defined as a reduction in alkalinity, can be quantified if preacidification alkalin… more

Date: January 1, 1978

Creator: Hendrey, G.R. (ed.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Arctic hydrology and meteorology

During 1990, we have continued our meteorological and hydrologic data collection in support of our process-oriented research. The six years of data collected to data is unique in its scope and continuity in a North Hemisphere Arctic setting. This valuable data base has allowed us to further our understanding of the interconnections and interactions between the atmosphere/hydrosphere/biosphere/lithosphere. The increased understanding of the heat and mass transfer processes has allowed us to incr… more

Date: January 1, 1990

Creator: Kane, D.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Glacial geology of the West Tensleep Drainage Basin, Bighorn Mountains, Wyoming

The glacial deposits of the West Tensleep Basin in the Bighorn Mountains of Wyoming are mapped and a relative chromology established. The deposits are correlated with the regional model as defined in the Wind River Mountains. A statistical analysis is performed on the density and weathering characteristics of the surficial boulders to determine their validity as indicators of relative age. (ACR)

Date: August 1, 1980

Creator: Burggraf, G.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Arctic hydrology and meteorology

To date, five years of hydrologic and meteorologic data have been collected at Imnavait Creek near Toolik Lake, Alaska. This is the most complete set of field data of this type collected in the Arctic of North America. These data have been used in process-oriented research to increase our understanding of atmosphere/hydrosphere/biosphere/lithosphere interactions. Basically, we are monitoring heat and mass transfer between various spheres to quantify rates. These could be rates of mass movement … more

Date: January 1, 1989

Creator: Kane, D.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Panther Creek, Idaho, Habitat Rehabilitation, Final Report.

The purpose of the project was to achieve full chinook salmon and steelhead trout production in the Panther Creek, Idaho, basin. Plans were developed to eliminate the sources of toxic effluent entering Panther Creek. Operation of a cobalt-copper mine since the 1930's has resulted in acid, metal-bearing drainage entering the watershed from underground workings and tailings piles. The report discusses plans for eliminating and/or treating the effluent to rehabilitate the water quality of Panther … more

Date: January 1, 1986

Creator: Reiser, Dudley W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Annual dynamics within the active layer

We have continued our meteorological and hydrologic data collection in support of our process-oriented research. The six years of data collected to date is unique in its scope and continuity in a North Hemisphere Arctic setting. This valuable data base has allowed us to further our understanding of the interconnections and interactions between the atmosphere/hydrosphere/biosphere/lithosphere. The increased understanding of the heat and mass transfer processes has allowed us to increase our mode… more

Date: January 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Forecasting contaminant concentrations: Spills in the White Oak Creek Basin

The Streamflow Synthesis and Reservoir Regulation (SSARR) model has been installed and sufficiently calibrated for use in managing accidental release of contaminants in surface waters of the White Oak Creek (WOC) watershed at ORNL. The model employs existing watershed conditions, hydrologic parameters representing basin response to precipitation, and a Quantitative Precipitation Forecast (QPF) to predict variable flow conditions throughout the basin. Natural runoff from each of the hydrological… more

Date: January 1, 1987

Creator: Borders, D.M.; Hyndman, D.W. & Huff, D.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessing Recharge and Geological Model Uncertainty at the Climax Mine Area of the Nevada Test Site

Hydrologic analyses are commonly based on a single conceptual-mathematical model. Yet hydrologic environments are open and complex, rendering them prone to multiple interpretations and mathematical descriptions. Considering conceptual model uncertainty is a critical process in hydrologic uncertainty assessment. This study assesses recharge and geologic model uncertainty for the Climax mine area of the Nevada Test Site, Nevada. Five alternative recharge models have been independently developed f… more

Date: November 8, 2007

Creator: Ye, M.; Pohlmann, K.; Chapman, J. & Pohll, G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Identification, Verification, and Compilation of Produced Water Management Practices for Conventional Oil and Gas Production Operations

The project is titled 'Identification, Verification, and Compilation of Produced Water Management Practices for Conventional Oil and Gas Production Operations'. The Interstate Oil and Gas Compact Commission (IOGCC), headquartered in Oklahoma City, Oklahoma, is the principal investigator and the IOGCC has partnered with ALL Consulting, Inc., headquartered in Tulsa, Oklahoma, in this project. State agencies that also have partnered in the project are the Wyoming Oil and Gas Conservation Commissio… more

Date: September 30, 2007

Creator: Henderson, Rachel

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Rainwater Wildlife Area, Watershed Management Plan, A Columbia Basin Wildlife Mitigation Project, 2002.

This Management Plan has been developed by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR) to document how the Rainwater Wildlife Area (formerly known as the Rainwater Ranch) will be managed. The plan has been developed under a standardized planning process developed by the Bonneville Power Administration (BPA) for Columbia River Basin Wildlife Mitigation Projects (See Appendix A and Guiding Policies Section below). The plan outlines the framework for managing the project are… more

Date: March 1, 2002

Creator: Childs, Allen B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Habitat Evaluation Procedures (HEP) Report; Iskuulpa Wildlife Mitigation and Watershed Project, Technical Report 1998-2003.

U.S. Fish and Wildlife Service (USFWS) Habitat Evaluation Procedures (HEP) were used to determine the number of habitat units credited to evaluate lands acquired and leased in Eskuulpa Watershed, a Confederated Tribes of the Umatilla Indian Reservation watershed and wildlife mitigation project. The project is designed to partially credit habitat losses incurred by BPA for the construction of the John Day and McNary hydroelectric facilities on the Columbia River. Upland and riparian forest, upla… more

Date: January 1, 2003

Creator: Quaempts, Eric

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Okanogan Subbasin Water Quality and Quantity Report for Anadromous Fish in 2006.

Fish need water of sufficient quality and quantity in order to survive and reproduce. The list of primary water quality indicators appropriate for monitoring of anadromous fish, as identified by the Upper Columbia Monitoring Strategy, includes: discharge, temperature, dissolved oxygen, pH, turbidity, conductivity, nitrogen, phosphorus and ammonia. The Colville Tribes Fish and Wildlife Department began evaluating these water quality indicators in 2005 and this report represents data collected fr… more

Date: December 1, 2007

Creator: Colville Tribes, Department of Fish & Wildlife

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Integrated Status and Effectiveness Monitoring Program - Entiat River Snorkel Surveys and Rotary Screw Trap, 2007.

The USFWS Mid-Columbia River Fishery Resource Office conducted snorkel surveys at 24 sites during the summer and fall periods of 2006 survey periods as part of the Integrated Status and Effectiveness Monitoring Program in the Entiat River. A total of 37,938 fish from 15 species/genera and an unknown category were enumerated. Chinook salmon were the overall most common fish observed and comprised 15% of fish enumerated followed by rainbow trout (10%) and mountain whitefish (7%). Day surveys were… more

Date: January 1, 2008

Creator: Nelle, R.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Habitat Evaluation Procedures (HEP) Report : Rainwater Wildlife Area, 1998-2001 Technical Report.

The 8,768 acre Rainwater Wildlife Area was acquired in September 1998 by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR) through an agreement with Bonneville Power Administration (BPA) to partially offset habitat losses associated with construction of the John Day and McNary hydroelectric facilities on the mainstem Columbia River. U.S. Fish and Wildlife Service (USFWS) Habitat Evaluation Procedures (HEP) were used to determine the number of habitat units credited to BPA for a… more

Date: January 1, 2004

Creator: Childs, Allen

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Earth Systems Science and Engineering

Providing the essential energy and water systems to support human needs while understanding and addressing their environmental consequences is a watershed problem for the 21st century. The LLNL Earth System Science and Engineering Program seeks to provide the scientific understanding and technological expertise to help provide solutions at both global and regional scales. Our work is highly collaborative with universities, laboratories and industrial partners across the world and involves obser… more

Date: February 21, 2006

Creator: Rotman, D A

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of an Unsuccessful Brook Trout Electrofishing Removal Project in a Small Rocky Mountain Stream.

In the western United States, exotic brook trout Salvelinus fontinalis frequently have a deleterious effect on native salmonids, and biologists often attempt to remove brook trout from streams by means of electrofishing. Although the success of such projects typically is low, few studies have assessed the underlying mechanisms of failure, especially in terms of compensatory responses. A multiagency watershed advisory group (WAG) conducted a 3-year removal project to reduce brook trout and enhan… more

Date: January 26, 2006

Creator: Meyer, Kevin A.; Lamansky, Jr., James A. & Schill, Daniel J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Garfield County Habitat for Fall Chinook and Steelhead, Annual Report 2006.

The objectives and tasks outlined in detail in this project report were implemented during calendar year 2006 in all the watersheds of Garfield County. The Pataha Creek Watershed was selected in 1993, along with the Tucannon and Asotin Creeks, as model watersheds by the Northwest Power and Conservation Council (NPCC). In the years since 1993, other watersheds in Garfield County have been designated as salmon bearing streams and have received numerous practices formerly just designated for the P… more

Date: January 1, 2007

Creator: Bartels, Duane

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Demonstrating fractal scaling of residence time distributions on the catchment scale using a fully-coupled, variably-saturated groundwater and land surface model and a Lagrangian particle tracking approach

The influence of the vadose zone, land surface processes, and macrodispersion on scaling behavior of residence time distributions (RTDs) is studied using a fully coupled watershed model in conjunction with a Lagrangian, particle-tracking approach. Numerical experiments are used to simulate groundwater flow paths from recharge locations along the hillslope to the streambed. These experiments are designed to isolate the influences of topography, vadose zone/land surface processes, and macrodisper… more

Date: November 7, 2007

Creator: Kollet, S J & Maxwell, R M

Item Type: Article

Partner: UNT Libraries Government Documents Department