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Articles 1 - 30 of 64
Full-Text Articles in Fresh Water Studies
Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Quarterly Report, Period Ending December 31, 2008, Margaret N. Rees
Limnological Studies
Project 1: Technical input has been provided at four advisory team meetings attended this quarter.
Project 2: A formal report titled, Surface Water Monitoring for Indicator Bacteria in High-use Sites of the Lake Mead National Recreation Area, has been prepared; an accompanying poster presentation for the Lake Mead Science Symposium is in preparation.
Project 3: A draft document titled, “Interagency Monitoring Action Plan (I-MAP): Quagga Mussels in Lakes Mead and Mohave” has been presented to an interagency core group to review and input. Six oral presentations related to quagga mussels are in preparation by this group for the Lake Mead …
Seasonal Changes In A Eutrophic Lake (Wilgreen Lake, Madison County, Kentucky) From Summer Stratification Through Fall Turnover, Richard D. Stockwell, Walter S. Borowski
Seasonal Changes In A Eutrophic Lake (Wilgreen Lake, Madison County, Kentucky) From Summer Stratification Through Fall Turnover, Richard D. Stockwell, Walter S. Borowski
EKU Faculty and Staff Scholarship
No abstract provided.
Surface Water Interaction With The Flood Plain In The Lower Virgin River, Clark County, Nevada, Jeffrie L. Pompeo
Surface Water Interaction With The Flood Plain In The Lower Virgin River, Clark County, Nevada, Jeffrie L. Pompeo
UNLV Theses, Dissertations, Professional Papers, and Capstones
Development of existing surface water rights on the Virgin River would decrease Southern Nevada's dependency on the Colorado River. Three monitoring sites were established to examine the relationship between Virgin River surface water flows and the floodplain aquifer. Automated water level measuring devices were installed in piezometers and wells to continuously track water levels and flow direction. Pump tests were conducted to establish the hydraulic parameters of the floodplain aquifer. Water chemistry data was analyzed to help determine the correlation between the floodplain aquifer and Virgin River water. Precipitation, recharge, streamflow and ET estimates were used to discuss water budgets. …
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.
Seasonal Changes In A Eutrophic Lake, Wilgreen Lake, Madison County, Kentucky, Richard D. Stockwell, Walter S. Borowski
Seasonal Changes In A Eutrophic Lake, Wilgreen Lake, Madison County, Kentucky, Richard D. Stockwell, Walter S. Borowski
EKU Faculty and Staff Scholarship
WilgreenLake (Madison County, Kentucky) covers ~169 acres, formed in 1966 by damming Taylor Fork. The Wilgreen watershed drains residential developments, modified woodlands, cattle pasture, and some industrial/urban areas in the city of Richmond. The lake is deemed “nutrient impaired” by the EPA.
Our main objective is to document the seasonal changes in key lake parameters from summer stratification through fall overturn over 4 months of sampling, August through November, 2008. We collect temperature, oxygen, pH, and conductivity data from 19 stations at depth intervals of 1 meter using an YSI multi-probe. Concurrent with collecting these framework data, we take water …
Droughtscape- Fall 2008, Kelly Smith
Droughtscape- Fall 2008, Kelly Smith
Droughtscape, Quarterly Newsletter of NDMC, 2007-
Washington Workshops Scheduled for November
Look for Warm West, Rainy Gulf, Easing Drought
New Drought Monitor Authors Profiled
Drought Impact Awareness Growing: Weather Forecast Offices, Geographers Highlight Issue
NDMC Takes on New Projects
Hundreds+ See NDMC at Ag Trade Show
NDMC Welcomes New Employees
Droughtscape- Fall 2008, Kelly Smith
Droughtscape- Fall 2008, Kelly Smith
Droughtscape, Quarterly Newsletter of NDMC, 2007-
Washington Workshops Scheduled for November
Look for Warm West, Rainy Gulf, Easing Drought
New Drought Monitor Authors Profiled
Drought Impact Awareness Growing: Weather Forecast Offices, Geographers Highlight Issue
NDMC Takes on New Projects
Hundreds+ See NDMC at Ag Trade Show
NDMC Welcomes New Employees
Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Quarterly Report, Period Ending September 30, 2008, Margaret N. Rees
Limnological Studies
Project 1: Technical input has been provided at eight advisory team meetings attended this quarter. Broad, overarching “Issues of Concern” developed for the Boulder Basin Adaptive Management Plan are currently under review by Drs. David Wong and Shawn Gerstenberger. A Selenium Management Plan is also under review.
Project 2: Data collected by the Southern Nevada Water Authority has been synthesized to summarize bacteria counts in high-use areas of Lakes Mead and Mohave. This information will be documented and interpreted for management use in a formal report in the upcoming quarter.
Project 3: A draft document titled “Suggested Standard Methods for …
Lake Samish Water Monitoring Project 2008 Final Report, Robin A. Matthews, Joan Vandersypen
Lake Samish Water Monitoring Project 2008 Final Report, Robin A. Matthews, Joan Vandersypen
Lake Samish
This report is a revised version of the 2006 and 2007 Final Reports by Matthews, et al., and contains most of the original text, updated figures, and additional discussion of all data collected from June 2005 through July 2008.
Lake Samish is a valuable aquatic resource, providing public access for boating, fishing, swimming, picnicking, and other water and lakeshore activities. Residents around the lake enjoy outstanding views of both the lake and its surrounding watershed, and the lake serves as a water supply for many of the lakeshore residents. Lake Samish is located in the Washington State Department of Ecology’s …
The Near East Drought Planning Manual: Guidelines For Drought Mitigation And Preparedness Planning, National Drought Mitigation Center
The Near East Drought Planning Manual: Guidelines For Drought Mitigation And Preparedness Planning, National Drought Mitigation Center
National Drought Mitigation Center: Publications
Table of Contents
1. Introduction to Drought Planning.............................................1
1.1 Effects of Drought in the Near East Region........................................................1
1.2 New Emphasis on Proactive Drought Planning .................................................. 3
1.3 Integration of Drought Planning and Sustainable Development ......................... 3
2. Explanation of Drought Concepts..............................................................5
2.1 Definitions ........................................................................................................ 5
2.2 The Nature of Drought ...................................................................................... 7
2.3 The Effects of Drought ...................................................................................... 7
3. HowtoDevelopaDroughtPlan.....................................................................................9
Step 1: Creating Political Momentum and Authority................................................9
Step 2: Coordinating Strategic Drought Planning .................................................. 12
Step 3: Fostering Involvement and Developing Common Understandings .............. 15
Step 4: Investigating Drought Monitoring, Risk, and Management Options............ 16
Step 5: Writing a …
Dispersal Limitation And Climate-Related Environmental Gradients Structure Microcrustacean Composition In Freshwater Lakes, Ellesmere Island, Canada, Angela L. Strecker, Rebecca Milne, Shelley E. Arnott
Dispersal Limitation And Climate-Related Environmental Gradients Structure Microcrustacean Composition In Freshwater Lakes, Ellesmere Island, Canada, Angela L. Strecker, Rebecca Milne, Shelley E. Arnott
Environmental Science and Management Faculty Publications and Presentations
Dramatic environmental change is expected in the Arctic, yet little is known about the occurrence and community composition of microcrustaceans in Arctic lakes and how this will be influenced by future environmental change. We sampled and calculated relative abundances of microcrustacean species in 54 lakes on Ellesmere Island, Canada. New species records on Ellesmere Island included Daphnia umbra, Tachidius discipes, and Artemeopsis stefanssoni. Daphnia middendorffiana/tenebrosa was the most common taxon and often dominated microcrustacean assemblages, likely a result of its pigmentation, which offers resistance to ultraviolet radiation. Species richness was positively associated with nutrients, dissolved organic carbon (DOC), temperature, calcium, …
Assessment Of Coliform Bacteria From Point And Nonpoint Sources In The Las Vegas Wash, Susan O'Neill, Kumud Acharya
Assessment Of Coliform Bacteria From Point And Nonpoint Sources In The Las Vegas Wash, Susan O'Neill, Kumud Acharya
Undergraduate Research Opportunities Program (UROP)
This project focuses on an assessment of coliform bacteria from point and non point sources in Las Vegas Wash. Correlations between land use related runoffs, nutrients and organic matter loading and total coliform will be studied. Data will be collected for both daily low and high flow events. Sampling locations will cover all major land use types such as golf course, hotels, hospitals, residential areas, etc., at both the main Wash and its tributaries.
Geology And Hydrology Of Karst In West-Central And North-Central Florida, Lee J. Florea
Geology And Hydrology Of Karst In West-Central And North-Central Florida, Lee J. Florea
Earth, Environmental, and Atmospheric Sciences Faculty Publications
The state of Florida is blessed with the highest density of large springs in North America and hundreds of smaller springs where the water from limestone aquifers returns to the surface (Scott et al., 2004). Spectacular underwater caves supply water to these springs. Lesser known are the equally fantastic air-filled caves of Florida and South Georgia (Florea, 2006; Lane, 1986). This paper features these underwater and airfilled caves, explores the impact of changes in sea level on karst in this near-coastal environment, and establishes several geologic and hydrologic characteristics that distinguish karst in the limestones of the southeast from karst …
Geology And Hydrology Of Karst In West-Central And North-Central Florida, Lee J. Florea
Geology And Hydrology Of Karst In West-Central And North-Central Florida, Lee J. Florea
Lee J Florea, PhD, P.G.
The state of Florida is blessed with the highest density of large springs in North America and hundreds of smaller springs where the water from limestone aquifers returns to the surface (Scott et al., 2004). Spectacular underwater caves supply water to these springs. Lesser known are the equally fantastic air-filled caves of Florida and South Georgia (Florea, 2006; Lane, 1986). This paper features these underwater and airfilled caves, explores the impact of changes in sea level on karst in this near-coastal environment, and establishes several geologic and hydrologic characteristics that distinguish karst in the limestones of the southeast from karst …
Effects Of Fish Introductions On The Geographic Distribution And Native Invertebrate Biodiversity Of Naturally Fishless Lakes In Maine, Emily Gaenzle Schilling
Effects Of Fish Introductions On The Geographic Distribution And Native Invertebrate Biodiversity Of Naturally Fishless Lakes In Maine, Emily Gaenzle Schilling
Electronic Theses and Dissertations
Widespread fish stocking has led to a worldwide decline in naturally fishless lakes and their associated communities. Little is known about the historical distribution or native communities of these freshwater ecosystems. The objectives of this study were to: 1) develop a quantitative method to remotely detect naturally fishless lakes in Maine, 2) conduct a landscape-scale assessment of unique attributes of fishless lake macroinvertebrate communities, 3) identify macroinvertebrate bioindicators of fish absence, and 4) assess effects of introduced fish on native macroinvertebrates. I identified two physiographic types of naturally fishless lakes in Maine: kettle lakes in the eastern lowlands and foothills …
Spatial And Temporal Patterns In The Microbial Diversity Of A Meromictic Soda Lake In Washington State, Pedro A. Dimitriu, Holly C. Pinkart, Brent M. Peyton, Melanie R. Mormile
Spatial And Temporal Patterns In The Microbial Diversity Of A Meromictic Soda Lake In Washington State, Pedro A. Dimitriu, Holly C. Pinkart, Brent M. Peyton, Melanie R. Mormile
All Faculty Scholarship for the College of the Sciences
The microbial community diversity and composition of meromictic Soap Lake were studied using culture-dependent and culture-independent approaches. The water column and sediments were sampled monthly for a year. Denaturing gradient gel electrophoresis of bacterial and archaeal 16S rRNA genes showed an increase in diversity with depth for both groups. Late-summer samples harbored the highest prokaryotic diversity, and the bacteria exhibited less seasonal variability than the archaea. Most-probable-number assays targeting anaerobic microbial guilds were performed to compare summer and fall samples. In both seasons, the anoxic samples appeared to be dominated by lactate-oxidizing sulfate-reducing prokaryotes. High numbers of lactate- and acetate-oxidizing …
Droughtscape- Summer 2008, Kelly Smith
Droughtscape- Summer 2008, Kelly Smith
Droughtscape, Quarterly Newsletter of NDMC, 2007-
VegDRI Expands West
Spring Rains Ease Drought But CA Still Dry
Scholar Donates Books
NDMC Welcomes Employees Bathke, Nothwehr
Latest Workshop Info Up
State Lawmakers to Focus on Drought Planning
Decadal Variation -- Clues to Droughts and Floods?
Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Annual Report, Period Ending May 31, 2008, Margaret N. Rees
Limnological Studies
Hiring: Limnologist Dr. Wai Hing (David) Wong was hired and officially reported to work on 5/15/2008.
Project 1 and Project 2: Dr. Wong has commenced work on Projects 1 and 2.
Project 3: Dr. Wong has commenced work on Project 3. A comprehensive zebra/quagga mussel bibliography has been completed and published to the 100th Meridian Web site. Six interagency, multi-disciplinary quagga mussel meetings have been held. A quagga mussel substrate project has been initiated and, through the coordination efforts of this project, two other studies have been selected and refined to help determine the ecological impacts of quagga mussel infestation …
A Paleolimnological Assessment Of Three Oligotrophic Watersheds In Maine, Tiffany Ann Wilson
A Paleolimnological Assessment Of Three Oligotrophic Watersheds In Maine, Tiffany Ann Wilson
Electronic Theses and Dissertations
Phosphorus (P) is a limiting nutrient in aquatic ecosystems. Its bioavailability determines the trophic status of lakes. The biogeochemistry of P in surface waters can be controlled by a combination of abiotic and biotic factors. Dissolved inorganic aluminum (Al) and iron (Fe) hydrolyze in streams and lakes to produce Al(OH)3 and Fe(OH)3 in the water column. These hydroxides may also form through photo-oxidation of complexes with DOC, liberation of inorganic metal species, and precipitation, followed by sedimentation. These solid phases readily adsorb P from the water column, reducing the amount that is available for biological nutrition (Kopácek et …
Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Quarterly Progress Report, Period Ending: April 1, 2008, Margaret N. Rees
Limnological Studies
Hiring: A decision is anticipated in the upcoming weeks regarding the hiring of a limnologist. Two candidates were selected from among three qualified applicants for telephone interviews; they were subsequently interviewed in-person.
Project 1: Review of the draft Boulder Basin Adaptive Management Plan is on-going. Meetings of the Systems Conveyance and Operations Program (SCOP) Technical Advisory Teams were attended.
Project 2: Development of a white paper expressing the joint needs of the entities involved in Water 2025 projects is on-going; scientific review of data and reports related to bacteria in high-use areas of Lake Mead is underway.
Project 3: Discussions …
Droughtscape- Spring 2008, Kelly Smith
Droughtscape- Spring 2008, Kelly Smith
Droughtscape, Quarterly Newsletter of NDMC, 2007-
San Angelo, April 24
Winter Sees Little Change in U.S. Drought
News Stories Reveal Array of Mitigation Strategies
NIDIS Wants You!
Sea Surface Temperatures Can Help Predict Drought
About DroughtScape
Recent Travels
Land Use Influences The Spatiotemporal Controls On Nitrification And Denitrification In Headwater Streams, Clay P. Arango, J. L. Tank
Land Use Influences The Spatiotemporal Controls On Nitrification And Denitrification In Headwater Streams, Clay P. Arango, J. L. Tank
All Faculty Scholarship for the College of the Sciences
N and C cycles in headwater streams are coupled, and land use can modify these cycles by increasing N availability and removing riparian vegetation. To increase our understanding of how land use modifies the controls on N cycling, we quantified rates of 2 microbial N transformations in a total of 18 agricultural and urban streams (with and without riparian buffers) for 3 y to examine how riparian vegetation and land use influence sediment nitrification and denitrification. Nitrification rates were highest in agricultural streams in late spring. Nitrification was not related to streamwater NH4+ concentrations but was positively related …
The Influence Of Metal Exposure History And Ultraviolet-B Radiation On Benthic Communities In Colorado Rocky Mountain Streams, Robert E. Zuellig, Donna R. Kashian, Marjorie L. Brooks, Peter M. Kiffney, William H. Clements
The Influence Of Metal Exposure History And Ultraviolet-B Radiation On Benthic Communities In Colorado Rocky Mountain Streams, Robert E. Zuellig, Donna R. Kashian, Marjorie L. Brooks, Peter M. Kiffney, William H. Clements
Environmental Science and Geology Faculty Research Publications
Interest in understanding the influence of ultraviolet-B (UVB; 280–320 nm) radiation in aquatic ecosystems has increased since the early 1990s. Pollution from historic mining operations coupled with physicochemical characteristics of Rocky Mountain streams that increase exposure of benthic communities to UVB provided an opportunity to examine how UVB interacted with heavy metal contamination to structure stream communities. We integrated a series of UVB addition experiments done in stream microcosms with a large-scale UVB shading experiment to test the hypothesis that effects of UVB were greater on benthic communities from metal-polluted streams than from reference streams. Microcosm experiments involved short-term exposure …
Seasonal Changes In Stratification And Oxygen Content Of A Eutrophic Lake, Wilgreen Lake, Madison County, Kentucky, Jill Hunter, Walter S. Borowski
Seasonal Changes In Stratification And Oxygen Content Of A Eutrophic Lake, Wilgreen Lake, Madison County, Kentucky, Jill Hunter, Walter S. Borowski
EKU Faculty and Staff Scholarship
Wilgreen Lake (Madison County, Kentucky) is listed by the Environmental Protection Agency as nutrient-impaired. The overabundance of nutrients is likely linked to the land-use practices in this area. Cattle pasture, residential developments served by septic systems, and urban/industrial areas lie in the lake’s watershed. We have studied the lake for two years to characterize its physical and chemical characteristics, and to identify nutrient sources.
The 2007 field season began in March and continued through October. We measured temperature and oxygen levels along with other parameters at 1-meter depth intervals at 19 stations distributed along the length of the lake and …
Oyster Harbour Catchment Appraisal 2007, Ron Master, South Coast Agricultural Rca Team
Oyster Harbour Catchment Appraisal 2007, Ron Master, South Coast Agricultural Rca Team
Resource management technical reports
No abstract provided.
Regional Analysis Of Trend And Step Changes Observed In Hydroclimatic Variables Around The Colorado River Basin, William Paul Miller, Thomas C. Piechota
Regional Analysis Of Trend And Step Changes Observed In Hydroclimatic Variables Around The Colorado River Basin, William Paul Miller, Thomas C. Piechota
Civil and Environmental Engineering and Construction Faculty Research
Recent research has suggested that changes in temperature and precipitation events due to climate change have had a significant impact on the availability and timing of streamflow. In this study, monthly temperature and precipitation data collected over 29 climate divisions covering the entire Colorado River basin and monthly natural flow data from 29 U.S. Geological Survey (USGS) gauge locations along the Colorado River are investigated for trend or step changes using parametric and nonparametric statistical tests. Temperature increases are persistent (at least 10 climate divisions over 6 months in trend analysis) throughout the year over the Colorado River basin, whereas …
Biogenic Porosity And Its Lattice Boltzmann Method Permeability In The Karst Biscayne Aquifer, Kevin Cunningham, Mike Sukop, Haibo Huang, Pedro Alvarez, Allen Curran, Michael Waker, Lee J. Florea, Robert Renken, Joann F. Dixon
Biogenic Porosity And Its Lattice Boltzmann Method Permeability In The Karst Biscayne Aquifer, Kevin Cunningham, Mike Sukop, Haibo Huang, Pedro Alvarez, Allen Curran, Michael Waker, Lee J. Florea, Robert Renken, Joann F. Dixon
Earth, Environmental, and Atmospheric Sciences Faculty Publications
No abstract provided.
Visualization Of Groundwater Flow Within Touching-Vu And Matrix Porosity In An Eogenetic Karst Aquifer, Lee J. Florea, Kevin J. Cunningham, Stephen Altobelli
Visualization Of Groundwater Flow Within Touching-Vu And Matrix Porosity In An Eogenetic Karst Aquifer, Lee J. Florea, Kevin J. Cunningham, Stephen Altobelli
Earth, Environmental, and Atmospheric Sciences Faculty Publications
In this study, we use an innovative, non-invasive technology, nuclear magnetic resonance imaging (NMRI), to visualize the direction and magnitude of groundwater flow in field samples of late Pleistocene limestone of the Biscayne aquifer. Specific goals of the first set of NMRI experiments are to map the advective velocity of water flowing at two rates of specific discharge (0.00025 and 0.00013 m/s) through a 10-cm-diameter cylindrical, epoxy-resin model. The model interior accurately reproduces a well-connected maze of ichnologically influenced, centimeter-scale, touching-vug macroporosity common within preferred flow zones in parts of the Biscayne aquifer. A second set of NMRI experiments investigates …
Focus Group On Karst Hydrology - Conceptual Models, Aquifer Characterization, And Numerical Modeling, Martin Sauter, Lee J. Florea, Others
Focus Group On Karst Hydrology - Conceptual Models, Aquifer Characterization, And Numerical Modeling, Martin Sauter, Lee J. Florea, Others
Earth, Environmental, and Atmospheric Sciences Faculty Publications
No abstract provided.
Droughtscape- Winter 2008, Kelly Smith
Droughtscape- Winter 2008, Kelly Smith
Droughtscape, Quarterly Newsletter of NDMC, 2007-
Now Up & On-Line:
Winter 2008 Outlook and Oct.-Dec. ’07 Summary
NDMC Experts Serve as Resource for Media
Drought Hits Ag and Urban Interests in 2007
Climatological Summary of Drought in 2007
NDMC Welcomes Data Miner Bo Zhang
New Grant Awards