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Articles 61 - 79 of 79
Full-Text Articles in Environmental Sciences
Probability Of Fire-Stopping Precipitation Events, U.S. Forest Service
Probability Of Fire-Stopping Precipitation Events, U.S. Forest Service
All U.S. Government Documents (Utah Regional Depository)
The possibility that a useful probability for fire stopping precipitation could be developed from historical weather records was investigated.
Rangeland Monitoring: Analysis, Interpretation, And Evaluation, United States Bureau Of Land Management
Rangeland Monitoring: Analysis, Interpretation, And Evaluation, United States Bureau Of Land Management
All U.S. Government Documents (Utah Regional Depository)
The collection of monitoring data results in quantitative and qualitative information obtained from measurements or estimates of the natural resources. These data are most valuable when their meaning is defined and presented in understandable terms to the resource manager. This is the analysis, interpretation, and evaluation process. The result is the documentation of conclusions on the progress of management to accomplish specific management objectives. Such conclusions are used for management and planning purposes, and in particular, for determining managment actions and establishing new or revised management objectives.
Overview Of The Proposed Critical Habitat For The Colorado River Endangered Fishes, United States Department Of The Interior Fish And Wildlife Service
Overview Of The Proposed Critical Habitat For The Colorado River Endangered Fishes, United States Department Of The Interior Fish And Wildlife Service
All U.S. Government Documents (Utah Regional Depository)
This document presents an overview of the process, procedures and determinations associated with the proposed critical habitat designation for the razorback sucker, Colorado squawfish, humpback chub, and bonytail (also known as bonytail chub). These species are listed as endangered under the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 et seq.). Part I is an overview of the proposed critical habitat designation for the Colorado River endangered fishes. Part II is a summary of the biological information used in determining areas for proposed designation and the description of each area proposed on January 29, 1993 (58 FR …
Environmental Assessment, Proposed Predatory Animal Damage Control On Public Lands In Sweetwater, Lincoln, Uinta, And Sublette Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management
Environmental Assessment, Proposed Predatory Animal Damage Control On Public Lands In Sweetwater, Lincoln, Uinta, And Sublette Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management
Environmental Assessments (WY)
This Environmental Assessment is prepared by the Bureau of Land Management (BLM), Rock Springs District with the cooperative participation of the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Animal Damage Control Unit (USDA-APHIS-ADC, hereafter referred to as APHIS-ADC). This environmental assessment documents the environmental impact analysis of the APHIS-ADC ongoing and proposed program of predatory animal damage control for the protection of domestic livestock and wildlife within the BLM Rock Springs District. The environmental assessment analyzes the impacts associated with the full range of animal damage control activities included in the APHIS-ADC proposed Predatory Animal Damage Control …
Revegetation Of Disturbed Semiarid Grassland In Canyonlands National Park, Susan B. Goldberg
Revegetation Of Disturbed Semiarid Grassland In Canyonlands National Park, Susan B. Goldberg
Canyonlands Research Bibliography
A grassland restoration project was conducted in Canyonlands National Park on an area recently disturbed due to construction. Two native grasses (Oryzopsis hymenoides and Stipa comata) were seeded with 18 different soil treatments. Stipa density and relative mycorrhizal colonization were measured. None of the soil treatments resulted in significantly greater Stipa density than the control treatment of seeding only plus water. There was very little correlation between Stipa density and mycorrhizal colonization based on the treatments (r2= 0.011 p = 0.05). Three treatments produced 3 to 5 times the VAN colonization as the control including spring cryptobiotic soil crusts, with …
Simulation Of Daily Precipitation From A Nonparametric Renewal Model, Balaji Rajagopalan, Upmanu Lall, David G. Tarboton
Simulation Of Daily Precipitation From A Nonparametric Renewal Model, Balaji Rajagopalan, Upmanu Lall, David G. Tarboton
Reports
Wet/dry spell characteristics of daily precipitation are of interest for a number of hydrologic applications (e.g., flood forecasting or assessment of erosion potential). Here, we examine issues related to designing an appropriate nonparametric scheme that focuses on spell characteristics for resampling historically daily precipitation data. A subset of the nonparametric wet/dry spell model presented in Lall et al (1993) is tested with synthetic data to justify the strategy proposed for applications. An application of the nonparametric wet/dry spell model to a Utah data set follows. Performance is judged on a set of statistical measures. Numerical comparisons of model performance with …
A Kernel Quantile Function Estimator For Flood Frequency Analysis, Young-Ii Moon, Upmanu Lall
A Kernel Quantile Function Estimator For Flood Frequency Analysis, Young-Ii Moon, Upmanu Lall
Reports
A kernel estimator (KQ) of the quantile function is presented here. Boundary kernels are used for extrapolation of tail quantiles. The bandwidth of the estimator is chosen using an automatic, "plus-in" method. Confidence intervals for the estimated quantile are estimated by bootstrapping. Comparisons of the estimator with selected tail probability estimators are offered. The KQ estimator presented here is shown to be competitive with other estimators.
Effectiveness Determination Of Two Different Water-Saving Devices For Toilet Tanks, C. Earl Israelsen, Gilberto Urroz
Effectiveness Determination Of Two Different Water-Saving Devices For Toilet Tanks, C. Earl Israelsen, Gilberto Urroz
Reports
Introduction: The project was successful in obtaining eight different brands of new toilet tanks in the 3.5 gals-per-flish-bariety, and two used ones requiring 5.0 gals per flish. The tanks were installed on a t atime on a padded stell frame and connected to a water supply. The float was adjusted to maintain the water in the tank at the level recommended by the manufacturer. When the flush and shut-off mechanisms were adjusted properly, the testing begain.
Development Of Mountain Climate Generator And Snowpack Model For Erosion Predictions In The Western United States Using Wepp: Phase Iv, David S. Bowles, U. Lall, D. G. Tarboton, E. Malek, B. Rajagopalan, T. Chowdhury, E. Kluzak
Development Of Mountain Climate Generator And Snowpack Model For Erosion Predictions In The Western United States Using Wepp: Phase Iv, David S. Bowles, U. Lall, D. G. Tarboton, E. Malek, B. Rajagopalan, T. Chowdhury, E. Kluzak
Reports
Executive Summary: Introduction: This report summarizes work conducted during the funding period (December 1, 1991 through September 30, 1992) of a Research Joint Venture Agreement between the Intermountain Research Station, Forest Service, U. S. Department of Agriculture and the Utah Water Research Laboratory (UWRL), Utah State University (USU). The purpose of the agreement is to develop a Western Mountain Cilmate Generator (MCLIGEN) similar in function to the existing (non-orographic area) Climate Generator (CLIGEN), which is part of the Water Erosion Prediciton Project (WEPP) procedure. Aso, we are developing a Western U.S. Snowpack Simulation Model for includsion in WEPP. In the …
Interpretation Of Drill Log Data: Dlog3d - A Probabilistic Tool For Analyzing Subsurface Soil Variability, Alaa El-Din Ali, Upmanu Lall
Interpretation Of Drill Log Data: Dlog3d - A Probabilistic Tool For Analyzing Subsurface Soil Variability, Alaa El-Din Ali, Upmanu Lall
Reports
Groundwater contamination potential is directly related to the location of zones of high hydraulic conductivity. Sedimentary depositional environments can be quite complex. Pockets of sand of varying thickness and orientation may be scattered over the aquifer. A contaminant pathway can esist where these pockets or lenses are interconnected. Aquifer pump tests do not provide useful information on the occurrence of such lenses. Drill log data directly sample the soil, but may represent very local sections of the aquifer, and are of relatively poor quality. Here we present a methodology (DLOG3D) that allows a probabilistic interpretation of drill log data that …
Diamond Mountain Resource Area Resource Management Plan And Environmental Impact Statement, Volume Ii, United States Bureau Of Land Management
Diamond Mountain Resource Area Resource Management Plan And Environmental Impact Statement, Volume Ii, United States Bureau Of Land Management
All U.S. Government Documents (Utah Regional Depository)
During the comment period January 3 through April 1, 1992, 286 letters were received on the Draft Diamond Mountain Resource Management Plan and Environmental Impact Statement. However, Several letters were received after the comment period closed and too late to be individually responded to in this document. The concerns and issues raised in these letters have been expressed in other comment letters which have been responded to and which are reprinted here.
Price - San Rafael Rivers Unit, Utah, Planning Report / Final Environmental Impact Statement, Colorado River Water Quality Improvement Program / Colorado River Salinity Control Program, United States Department Of The Interior, Bureau Of Reclamation And United States Department Of Agriculture, Soil Conservation Service
Price - San Rafael Rivers Unit, Utah, Planning Report / Final Environmental Impact Statement, Colorado River Water Quality Improvement Program / Colorado River Salinity Control Program, United States Department Of The Interior, Bureau Of Reclamation And United States Department Of Agriculture, Soil Conservation Service
All U.S. Government Documents (Utah Regional Depository)
This integrated Planning Report/Final Environmental Impact Statement (PR/FEIS) presents an analysis of the planning process and the environmental impacts of the proposed Price-San Rafael Rivers Unit (Unit) of the Colorado River Water Quality Improvement Program (CRWQIP) and the Colorado River Salinity Control Program (CRSC). The document has been jointly prepared by the Bureau of Reclamation (Reclamation) and the Soil Conservation Service (SCS) to address the full range of potential environmental impacts, in compliance with the National Environmental Policy Act (NEPA). The CRWQIP/CRSC programs provide for projects upstream of Imperial Dam (near Yuma, Arizona, on the Arizona-California border) that are necessary …
Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, James A. Truesdale, National Park Service
Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, James A. Truesdale, National Park Service
All U.S. Government Documents (Utah Regional Depository)
Archeological excavations in Dinosaur National Monument (DINO) were conducted at 5MF2645 (the Pool Creek Site) in 1988 and 42UN1724 (Juniper Ledge Shelter) in 1989. The information from these two sites, along with archeological data obtained between 1988 and 1992, have expanded our knowledge of the past 3700 years of human occupation in the DINO area. Juniper Ledge Shelter is a south-southeast facing rockshelter in the Jones Hole Ely Creek area of the monument. Excavation of a two meter square unit produced evidence of three occupational components and a Fremont burial of an adult female with associated artifacts. The upper two …
Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior
Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior
All U.S. Government Documents (Utah Regional Depository)
This draft environmental impact statement (EIS) analyzes the impacts of operations from 1963 to 1990 (baseline conditions) and alternative operations of Glen Canyon Dam on downstream environmental and cultural resources of Glen and Grand Canyons. Alternative operations evaluated include three that would provide steady flows; three that would provide various levels of fluctuating flows; and two, including no action, that would provide unrestricted fluctuating flows. Additional measures have been combined with the alternative operations, where appropriate, to provide additional resource protection or enhancement. The preferred alternative is the Modified Low Fluctuating Flow Alternative.
Some Economic Impacts Of The 1988 Fires In The Yellowstone Area, U.S. Forest Service
Some Economic Impacts Of The 1988 Fires In The Yellowstone Area, U.S. Forest Service
All U.S. Government Documents (Utah Regional Depository)
Revenues from tourism and loss of tourist expenditures were investigated
Canyonlands National Park And Orange Cliffs Unit Of Glen Canyon National Recreation Area Environmental Assessment For Backcountry Management Plan, National Park Service
Canyonlands National Park And Orange Cliffs Unit Of Glen Canyon National Recreation Area Environmental Assessment For Backcountry Management Plan, National Park Service
All U.S. Government Documents (Utah Regional Depository)
Whether on foot, bicycle, horseback, or in vehicles, most visitors come to Canyonlands National Park (Canyonlands) to experience solitude or to "get away from people." Yet visitation to Canyonlands has risen exponentially over the past five years (Figures 1 and 2). Visitation is expected to continue to rise. As a function of this increase in number of visitors, adverse impacts to Canyonlands' resources have increased and the visitors' ability to find solitude has decreased. Since the mandate of the National Park Service (NPS) is to balance visitor access to the parks with preservation and protection of natural and cultural resources, …
Big Eightmile, North Fork Of Timber And Alder Creek Timber Sale Final Environmental Impact Statement, United States Forest Service
Big Eightmile, North Fork Of Timber And Alder Creek Timber Sale Final Environmental Impact Statement, United States Forest Service
All U.S. Government Documents (Utah Regional Depository)
This Final Environmental Impact Statement documents the analysis of nine alternatives, including a "no action" alternative, that were developed for the proposed Big Eightmile, North Fork Timber, and Alder Creeks Timber Sales. The proposed action is designed to help achieve the silvicultural goals and objectives of the 1988 Salmon National Forest Land and Resource Management Plan (Forest Plan). Each alternative responds to issues associated with the proposed action that were identified during the scoping processes both preceding and following the Draft Environmental Impact Statement.
Timpanogos Cave National Monument Environmental Impact Statement, General Management Plan, Development Concept Plan, United States Department Of The Interior National Park Service
Timpanogos Cave National Monument Environmental Impact Statement, General Management Plan, Development Concept Plan, United States Department Of The Interior National Park Service
All U.S. Government Documents (Utah Regional Depository)
This plan was initiated to fulfill the legal requirements as mandated by section 604 of Public Law 95-625 and is in compliance with NPS management policies, applicable legislation, and executive requirements. The purpose of this Environmental Impact Statement/General Management Plan/Development Concept Plan is to identify and assess the various management alternatives and associated potential environmental impacts relative to monument operations, visitor use and access, natural and cultural resource management, and general development at Timpanogos Cave National Monument. In developing these alternatives, special attention was focused on the management objectives of the monument and current issues as presented in the "Purpose …
Zion Canyon Headquarters, Zion National Park, Utah, Draft Development Concept Plan, Environmental Assessment, United States Department Of The Interior, National Park Service
Zion Canyon Headquarters, Zion National Park, Utah, Draft Development Concept Plan, Environmental Assessment, United States Department Of The Interior, National Park Service
All U.S. Government Documents (Utah Regional Depository)
The study area, referred to as the headquarters area, incorporates the area from the south entrance station north to the Zion Canyon bridge. This includes the visitor center, the Watchman and South campgrounds, the amphitheaters, the nature center, the Oak Creek, Watchman, and Pine Creek residential areas, and the Oak Creek maintenance area. The study area encompasses approximately 325 acres. It includes a development zone (107 acres) and a natural zone (218 acres), and is surrounded by a proposed wilderness subzone.