Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Resource (3)
- Water (3)
- Area (2)
- Environmental (2)
- Field (2)
-
- Final (2)
- Impact (2)
- Jordan (2)
- Management (2)
- Office (2)
- Planning (2)
- Proposed (2)
- Statement (2)
- Carbon Isotopes (1)
- Colorado River (1)
- Cover (1)
- Dam (1)
- Detection (1)
- Determinants (1)
- Development (1)
- Domestic (1)
- Downstream nutrient concentrations (1)
- Encounter rate (1)
- Eutrophication (1)
- Fine sediment (1)
- For-aging behavior (1)
- Foraging mode (1)
- Forest (1)
- Geophysical (1)
- Glen Canyon Dam (1)
Articles 1 - 18 of 18
Full-Text Articles in Physical Sciences and Mathematics
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Green Canyon Environmental Research Area, Logan Utah
No abstract provided.
Preliminary Perspectives On The Health Needs Of Pastoral Women On The Borana Plateau Using Participatory Approaches, D. Layne Coppock, Seyoum Tezera, Solomon Desta
Preliminary Perspectives On The Health Needs Of Pastoral Women On The Borana Plateau Using Participatory Approaches, D. Layne Coppock, Seyoum Tezera, Solomon Desta
Environment and Society Faculty Publications
Since 2000, the PARIMA project has conducted participatory research and outreach among pastoralists in southern Ethiopia. This has led to notable achievements in terms of forming collective-action groups dominated by women, stimulation of sustainable micro-finance and micro-enterprise activities, and improving linkages of pastoral producers to livestock markets. Despite such gains, there are many other challenges to be addressed. One is poor human health. PARIMA researchers used participatory and qualitative methods to conduct a preliminary assessment of women’s health problems among members of six, well-established collective-action groups from the Borana and Gugi zones in the Oromia Regional State during 2008. Conventional …
What Are Consumers In Moyale, Kenya Willing To Pay For Improved Milk Quality?, D. Layne Coppock, Francis O. Wayua, Mohamed G. Shibia, Moses S. Mamo
What Are Consumers In Moyale, Kenya Willing To Pay For Improved Milk Quality?, D. Layne Coppock, Francis O. Wayua, Mohamed G. Shibia, Moses S. Mamo
Environment and Society Faculty Publications
Pastoralists in northern Kenya and southern Ethiopia may be able to diversify income by selling milk to urban residents. However, milk sold in open-air markets is often low in quality because it has been transported long distances without refrigeration and is subject to spoilage, or because milk is adulterated prior to sale to boost volume or enhance appearance. Open-air markets are characterized by low-income consumers who must make choices about milk quality with virtually no information other than their own sensory perceptions. PARIMA researchers used an experimental-auction approach to determine what residents in Moyale, Kenya, are willing to pay (WTP) …
Successful Implementation Of Collective Action And Human-Capacity Building Among Pastoralists In Southern Ethiopia: Lessons Learned, 2001-2008, D. Layne Coppock, Seyoum Tezera, Solomon Desta, Getachew Gebru
Successful Implementation Of Collective Action And Human-Capacity Building Among Pastoralists In Southern Ethiopia: Lessons Learned, 2001-2008, D. Layne Coppock, Seyoum Tezera, Solomon Desta, Getachew Gebru
Environment and Society Faculty Publications
Since 2000 the PARIMA project has implemented pilot risk-management activities among poverty-stricken, semi-settled pastoralists in southern Ethiopia. The goal has been to improve human welfare via collective action and capacity building. Outcomes include progress in income generation, asset conservation, and livelihood diversification. The approach has been unique to southern Ethiopia in that a bottom-up, participatory perspective has dominated. It has focused on the priorities and felt needs of local people rather than top-down development of livestock or agricultural technology. Fifty-nine collective-action groups were created. Dominated by women, they have included over 2,300 members and most groups have been recently merged …
Are Cattle Die-Offs Predictable On The Borana Plateau, D. Layne Coppock, Getachew Gebru, Solomon Desta, Sintayehu Mesele, Seyoum Tezerra
Are Cattle Die-Offs Predictable On The Borana Plateau, D. Layne Coppock, Getachew Gebru, Solomon Desta, Sintayehu Mesele, Seyoum Tezerra
Environment and Society Faculty Publications
Drought regularly affects rangelands and contributes to high death rates for livestock and poverty for pastoralists. But do livestock losses occur randomly simply when rainfall is low, or are they cyclical and predictable? Previously, PARIMA researchers proposed that high stocking rates—combined with low rainfall—trigger livestock die-offs on the Borana Plateau. It takes about six years for animal numbers to recover, setting the stage for another die-off when a dry year occurs. This “boom-and-bust” cycle is based on observed herd crashes in 1983-5, 1991-3, and 1998-9. Researchers predicted in 2002 that the next major die-off would occur during 2004-06, and one …
Nutrient Loading And Eutrophication In The Great Salt Lake, Wayne A. Wurtsbaugh
Nutrient Loading And Eutrophication In The Great Salt Lake, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
No abstract provided.
Movement Strategies Of Seed Predators As Determinants Of Plant Recruitment Patterns, Lorenzo Mari, Renato Casagrandi, Marino Gatto, Tal Avgar, Ran Nathan
Movement Strategies Of Seed Predators As Determinants Of Plant Recruitment Patterns, Lorenzo Mari, Renato Casagrandi, Marino Gatto, Tal Avgar, Ran Nathan
Wildland Resources Faculty Publications
Plant recruitment in nature exhibits several distinctive patterns ranging from hump shaped to monotonically decreasing with distance from the seed source. We investigate the role of post-dispersal seed predation in shaping these patterns, introducing a new mechanistic model that explicitly accounts for the movement strategy used by seed eaters. The model consists of two partial differential equations describing the spatiotemporal dynamics of both seed and predator densities. The movement strategy is defined by how predators move in response to the different cues they can use to search for seeds. These cues may be seed density, seed intake, distance from the …
How Movement Properties Affect Prey Encounter Rates Of Ambush Versus Active Predators: A Comment On Scharf Et Al, Tal Avgar, Nir Horvitz, Luba Broitman, Ran Nathan
How Movement Properties Affect Prey Encounter Rates Of Ambush Versus Active Predators: A Comment On Scharf Et Al, Tal Avgar, Nir Horvitz, Luba Broitman, Ran Nathan
Wildland Resources Faculty Publications
Using an individual‐based model, Scharf and coworkers showed that ambush predators may encounter prey more frequently than active predators. We show that this surprising result emerges because active predators were oblivious to prey during movement, an assumption that refutes the common conception about active foraging and lessens the key difference between these foraging modes. A revised model confirms that active predators always encounter prey more frequently, unequivocally supporting the authors’ conclusion that the advantage of active predators diminishes as prey moves faster or more directionally. We suggest that movement‐dependent perception quality can determine the relative efficiency of these two foraging …
Richfield Field Office Planning Area - Proposed Resource Management And Final Environmental Impact Statement, United States Department Of The Interior, Bureau Of Land Management
Richfield Field Office Planning Area - Proposed Resource Management And Final Environmental Impact Statement, United States Department Of The Interior, Bureau Of Land Management
Final environmental Impact Statements (UT)
The Proposed RMP was crafted primarily from the Preferred Alternative presented in the DRMP/DEIS (Alternative B) and includes other decisions within the range of alternatives (Alternatives N, A, C, and D) in response to public comments and internal review. The No Action Alternative (Alternative N) reflects current management. The BLM has removed the DRMP/DEIS Alternative B (Preferred Alternative) from the PRMP/FEIS. The other DRMP/DEIS Alternatives (Alternatives N, A, C, and D) and analyses are carried forward in the PRMP/FEIS only for comparative purposes and to correct some mistakes that were identified during the public comment period.
Moab Field Office Planning Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Department Of The Interior, Bureau Of Land Management
Moab Field Office Planning Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Department Of The Interior, Bureau Of Land Management
Final environmental Impact Statements (UT)
This Proposed Resource Management Plan (RMP) and Final Environmental Impact Statement (EIS) describes and analyzes the Proposed Plan and draft alternatives for the planning and management of public lands and resources administered by the Bureau of Land Management (BLM), Moab Field Office. The Moab planning area is located in southeastern Utah and includes approximately 2.5-million acres of land in Grand and San Juan Counties. Within the Moab planning area, the BLM manages approximately 1.8-million acres of BLM-administered public land surface as well as about 29,000 acres of federal mineral estate.
Timing And Cause Of Water Level Fluctuations In Kluane Lake, Yukon Territory, Over The Past 5000 Years, Janice Brahney, John J. Clague, Brian Menounos, Thomas W. D. Edwards
Timing And Cause Of Water Level Fluctuations In Kluane Lake, Yukon Territory, Over The Past 5000 Years, Janice Brahney, John J. Clague, Brian Menounos, Thomas W. D. Edwards
Watershed Sciences Faculty Publications
We reconstructed late Holocene fluctuations of Kluane Lake in Yukon Territory from variations in bulk physical properties and carbon and nitrogen elemental and isotopic abundances in nine sediment cores. Fluctuations of Kluane Lake in the past were controlled by changes in climate and glaciers, which affected inflow of Slims and Duke rivers, the two largest sources of water flowing into the lake. Kluane Lake fluctuated within a narrow range, at levels about 25 m below the present datum, from about 5000 to 1300 cal yr BP. Low lake levels during this interval are probably due to southerly drainage of Kluane …
Geophysical Imaging Of Watershed Subsurface Patterns And Prediction Of Soil Texture And Water Holding Capacity, H. Abdu, D. A. Robinson, M. Seyfried, Scott B. Jones
Geophysical Imaging Of Watershed Subsurface Patterns And Prediction Of Soil Texture And Water Holding Capacity, H. Abdu, D. A. Robinson, M. Seyfried, Scott B. Jones
Plants, Soils, and Climate Faculty Publications
The spatial distribution of subsurface soil textural properties across the landscape is an important control on the hydrological and ecological function of a watershed. Traditional methods of mapping soils involving subjective assignment of soil boundaries are inadequate for studies requiring a quantitative assessment of the landscape and its subsurface connectivity and storage capacity. Geophysical methods such as electromagnetic induction (EMI) provide the possibility of obtaining high-resolution images across a landscape to identify subtle changes in subsurface soil patterns. In this work we show how EMI can be used to image the subsurface of a ∼38 ha watershed. We present an …
Environmental Assessment Experimental Releases From Glen Canyon Dam, Arizona, 2008 Through 2012, U.S. Department Of The Interior, Bureau Of Reclamation, Upper Colorado Region, Salt Lake City, Utah
Environmental Assessment Experimental Releases From Glen Canyon Dam, Arizona, 2008 Through 2012, U.S. Department Of The Interior, Bureau Of Reclamation, Upper Colorado Region, Salt Lake City, Utah
All U.S. Government Documents (Utah Regional Depository)
No abstract provided.
Lakes And Forests As Determinants Of Downstream Nutrient Concentrations In Small Mountain Watersheds, P. D. Brown, Wayne A. Wurtsbaugh, K. Nydick
Lakes And Forests As Determinants Of Downstream Nutrient Concentrations In Small Mountain Watersheds, P. D. Brown, Wayne A. Wurtsbaugh, K. Nydick
Watershed Sciences Faculty Publications
Lakes are dynamic processors of nutrients and may hold an active role in modifying the water chemistry of stream systems. In this study, we examine the influence of lakes and an important terrestrial component—forest cover—on the nutrient levels of stream water in 11 Rocky Mountain (Idaho) watersheds. Water samples were collected from the inflow and outflow of lakes with varying amounts of upstream lakes and forested area during spring runoff and summer base flow. During base flow, mean total nitrogen concentrations at the inflow of final lakes were significantly related to relative upstream lake area, increasing from 34 to 103 …
Paleoecology Of Early Jurassic Navajo Sandstone Interdune Deposits, Nathan Daniel Wilkens
Paleoecology Of Early Jurassic Navajo Sandstone Interdune Deposits, Nathan Daniel Wilkens
Canyonlands Research Bibliography
The Lower Jurassic Navajo Sandstone represents a desert that covered more than 366,000 square kilometers. Localized interdune deposits commonly occur along the eastern edge of this desert that include carbonates, bioturbated layers, and plant fossils. Previous studies of these deposits focused on specific fossil types or isolated sites. This study involved a comprehensive analysis of the paleoecology of interdune deposits with an integrated approach combining paleontology, sedimentology and geochemistry. The methods used in this study were devised to test specific paleoecological and preservational questions, including water sources and geochemistry, sedimentation mechanisms, fossil identification and paleoecology, taphonomy, and diagenesis. Three hypotheses …
Just Add Water: Reclamation Projects And Development Fantasies In The Upper Basin Of The Colorado River, Stephen C. Strugeon
Just Add Water: Reclamation Projects And Development Fantasies In The Upper Basin Of The Colorado River, Stephen C. Strugeon
Library Faculty & Staff Publications
The history of the development of the American West is full of countless examples of promoters seeking to encourage outside investors to buy land, invest in mines, and build railroads. The history of water projects in the region is no different. Residents of communities such as Grand Junction, Colorado, recognized early on the two-fold dilemma that they faced: irrigation and reclamation projects would be critical to the economic growth of the area, and the funding for these projects would have to be obtained from sources outside the region. The promoters of such projects relied upon booster literature in order to …
Water Management With Water Conservation, Infrastructure Expansions, And Source Variability In Jordan, David E. Rosenberg, Richard Howitt, Jay Lund
Water Management With Water Conservation, Infrastructure Expansions, And Source Variability In Jordan, David E. Rosenberg, Richard Howitt, Jay Lund
Civil and Environmental Engineering Faculty Publications
A regional hydroeconomic model is developed to include demand shifts from nonprice water conservation programs as input parameters and decision variables. Stochastic nonlinear programming then jointly identifies the benefit-maximizing portfolio of conservation and leak reduction programs, infrastructure expansions, and operational allocations under variable water availability. We present a detailed application for 12 governorates in the Hashemite Kingdom of Jordan. It considers targeted installations of water-efficient appliances, leak reduction in the distribution system, surface and groundwater development, seawater desalination, conveyance, and wastewater treatment projects. Results show that (1) water conservation by urban users generates substantial regional benefits and can delay infrastructure …
Intermittent Water Supplies: Challenges And Opportunities For Residential Water Users In Jordan, David E. Rosenberg, Samer Talozi, Jay Lund
Intermittent Water Supplies: Challenges And Opportunities For Residential Water Users In Jordan, David E. Rosenberg, Samer Talozi, Jay Lund
Civil and Environmental Engineering Faculty Publications
Intermittent access to improved urban water supplies is a large and expanding global problem. This paper describes 16 supply enhancement and 23 demand management actions available to urban residential water users in Jordan to cope with intermittent supplies. We characterize actions by implementation, costs, and water quantities and qualities acquired or conserved. This effort systematically identifies potential options prior to detailed study and shows that water users have significant capacity to affect demand. We suggest several methods to evaluate options and highlight the need to include local water management decisions in integrated water resources management and planning at utility and …