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Articles 241 - 270 of 281
Full-Text Articles in Earth Sciences
Agenda: Innovation In Western Water Law And Management, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Innovation In Western Water Law And Management, University Of Colorado Boulder. Natural Resources Law Center
Innovation in Western Water Law and Management (Summer Conference, June 5-7)
Conference organizers and/or faculty included University of Colorado School of Law professors Lawrence J. MacDonnell, David H. Getches, Charles F. Wilkinson and Richard B. Collins.
Pressures of population, drought, and changing water use have provided the impetus for numerous innovations in water law and management in recent years. The Center's annual conference June 5-7, 1991, will look at innovation and change in five areas--water planning, special water management areas, negotiated settlements of tribal water rights, conjunctive use of ground and surface water, and public values in water decision making. Each session will begin with talks by experts from several western …
Determination Of The Abient Toxicity Of The Tailwater Of Nimrod Lake, John T. Knight
Determination Of The Abient Toxicity Of The Tailwater Of Nimrod Lake, John T. Knight
Arkansas Water Resources Center Technical Reports
The objective of this research was to determine if ambient toxicity exists in the receiving stream below a reservoir in which water from the hypolimnion is released. The Ceriodaphnia 7-day test was utilized to determine if toxicity existed. This test is routinely used in the monitoring of municipal and industrial effluent. It has also been utilized in determining if ambient toxicity exists within receiving streams. Nimrod Lake is a flood control impoundment on the Fourche LaFave River in west central Arkansas. The literature suggest that during stratification the hypolimnetic release contains high levels of iron, manganese, ammonia and sulfide during …
The Association Of Water Quality Parameters, Geological Substrates And Periphyton Community Structure, Richard L. Meyer, Julia Christensen Eichman
The Association Of Water Quality Parameters, Geological Substrates And Periphyton Community Structure, Richard L. Meyer, Julia Christensen Eichman
Arkansas Water Resources Center Technical Reports
This research was designed to understand the structure of epilithic diatom assemblage of a first-to-third order stream system which has minimal variance in nutrient concentration, but significant differences in geomorphological character. The primary objective was to determine the importance of geological substrate on the structure of the diatom assemblages. The second objective was to examine the effect of flow on these assemblages, and the third part of the research was to develop a seasonal model of temporal and spatial annual succession. The temporal and spatial models represent the effect of seasons, stream order, substrate characteristics, storm events, and periods of …
Shifting Water To Urban Uses: Activities Of The Metropolitan Water District Of Southern California, Timothy H. Quinn
Shifting Water To Urban Uses: Activities Of The Metropolitan Water District Of Southern California, Timothy H. Quinn
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
36 pages.
Contains references.
Evaluating Judicial Capacity To Determine Public Welfare Values In Water Transfers, Charles T. Dumars
Evaluating Judicial Capacity To Determine Public Welfare Values In Water Transfers, Charles T. Dumars
Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)
31 pages (includes illustrations).
Contains references.
An Evaluation Of The Effect Of Discharging A High Quality Effluent Into A Small Ozark Mountain Stream, David G. Parker, Floyd E. Cotter, Sandra C. Parker
An Evaluation Of The Effect Of Discharging A High Quality Effluent Into A Small Ozark Mountain Stream, David G. Parker, Floyd E. Cotter, Sandra C. Parker
Arkansas Water Resources Center Technical Reports
Recently the newly constructed Fayetteville wastewater treatment plant went on line and directed a portion of its discharge to a point in the Mud Creek drainage basin that had previously not received any effluent. Prior to the discharge, a background study had been performed to establish the water quality in the basin. The background data, when compared to the data collected by this study, allowed any alteration of the stream water quality to be evaluated. Also the modeling procedure used to set the effluent limits for the treatment plant was analyzed. All stream data were compared to the limits set …
Water Quality In The Lower Platte River Basin With Emphasis On Agrichemicals, R. R. Spalding
Water Quality In The Lower Platte River Basin With Emphasis On Agrichemicals, R. R. Spalding
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
A Colorado River Basin Authority: Opportunity For Sharing River Basin Management And Resources, David H. Getches
A Colorado River Basin Authority: Opportunity For Sharing River Basin Management And Resources, David H. Getches
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
32 pages.
Contains references.
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Managing The Upper Rio Grande: Old Institutions, New Players, Steven J. Shupe
Boundaries and Water: Allocation and Use of a Shared Resource (Summer Conference, June 5-7)
19 pages.
Determining Pesticide And Nitrate Levels In Spring Water In Northwest Arkansas, T. L. Lavy, B. A. Dehart, John D. Mattice
Determining Pesticide And Nitrate Levels In Spring Water In Northwest Arkansas, T. L. Lavy, B. A. Dehart, John D. Mattice
Arkansas Water Resources Center Technical Reports
Occurrences of pesticides in our nations ground water are on the rise. As states become aware of this problem and begin monitoring programs, incidence of contamination will probably increase. Since the problem of pesticides in groundwater is relatively new, little research has centered on the fate of pesticides after they reach the groundwater environment. In Northwest Arkansas efforts to monitor groundwater for pesticides have been small. Twenty-five springs in Northwest Arkansas were sampled in the fall of 1988, and spring of 1989. Analysis for atrazine, alachlor, metolachlor, diuron, and simazine in spring water was preformed using gas liquid chromatography and …
Susceptibility Of Northern Minnesota Lakes To Acid Deposition Impacts, Clifford J. Twaroski, J. David Thornton, Rick L. Strassman, Patrick L. Brezonik
Susceptibility Of Northern Minnesota Lakes To Acid Deposition Impacts, Clifford J. Twaroski, J. David Thornton, Rick L. Strassman, Patrick L. Brezonik
Journal of the Minnesota Academy of Science
ABSTRACT-lake chemistry surveys indicate a large number of lakes with acid neutralizing capability (ANC) below 200 μeq/L occur in northeast Minnesota where shallow soils over bedrock and exposed rock outcrops predominate, and in moraine areas having rolling to steep topography in north-central and east-central Minnesota. In the Boundary Waters area, lake chemistry is strongly associated with bedrock geology. lakes with ANC <100 μeq/L are associated with granite, basalt, and gabbro formations, while lakes with ANC of 100- 200 μeq/L are associated with slate and greenstone formations. In the rest of the state where soils are deep, landform, soil type, and lake hydrology determine lake chemistry. Most low ANC lakes are found in terminal moraine areas. These lakes are generally small ( <40 ha in area), have limited groundwater inflow, and typically classed as precipitation-dominated seepage lakes. Higher ANC lakes (>400 μeq/L) are often associated with agricultural and residential land uses. Relationships found between ANC and bedrock geology, and between ANC and landform and soils, provided the basis for mapping the distribution of low ANC surface waters in Minnesota. …100>
County-Based Priority Assessment Methodology For Phasing Of Wellhead Protection Programs, H. O. Pfannkuch, M. E. Campion, D. C. Mccaa, J. M. Palenberg
County-Based Priority Assessment Methodology For Phasing Of Wellhead Protection Programs, H. O. Pfannkuch, M. E. Campion, D. C. Mccaa, J. M. Palenberg
Journal of the Minnesota Academy of Science
ABSTRACT-Setting priorities to schedule and implement wellhead protection programs for municipal and community drinking water supplies is presented in the framework of a general risk assessment approach. This includes a hazard identification procedure representing the likelihood of contaminants being released to the surface environment, a hydrogeologic vulnerability assessment representing the risk of contaminants entering the groundwater supply, and an impact assessment, strongly linked to the population at risk. A methodology was developed to aggregate information on a county basis for Minnesota. The resulting composite risk index map shows a number of counties in the central part of the state roughly …
Factors Affecting Water-Supply Potential Of The Twin Cities Metropolitan Area Aquifer System, Michael E. Schoenberg
Factors Affecting Water-Supply Potential Of The Twin Cities Metropolitan Area Aquifer System, Michael E. Schoenberg
Journal of the Minnesota Academy of Science
ABSTRACT-The Twin Cities aquifer system in Minnesota contains five aquife~s and fou: confining units that together consist of fourteen geologic units. Unconsolidated sand and gravel aqmfers overlie bedrock sandstone and carbonate aquifers. Between 1880 and 1980, groundwater wi_thdrawals have c_aused long-term wate~ level declines of as much as 90 feet in the Prairie du Chien-Jordan aquifer and 240 feet m the deeper Mount S~monHinckley aquifer-the two major sources of groundwater supplies in the ar~a .. The estimated max1mu1:1 continuous withdrawal rate from the aquifer system is about 650 Mgal/d (million gallons per day). This compares with an average daily groundwater …
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter - Ii, D. C. Wolf, J. T. Gilmour, P. M. Gale
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter - Ii, D. C. Wolf, J. T. Gilmour, P. M. Gale
Arkansas Water Resources Center Technical Reports
In Arkansas, approximately 1 Tg of poultry (Gallus gallus domesticus) manure and litter is produced annually. These waste products are commonly applied to pastures as a soil amendment or fertilizer, but excessive application rates and poor management practices could result in nutrient contamination of ground and surface water. The purpose of this study was to: (1) assess the nutrient concentrations in poultry manure and (2) evaluate the nitrogen loss from land-applied poultry litter and manure due to ammonia volatilization and denitrification. Analyses for total Kjeldahl nitrogen (TKN), inorganic nitrogen (Ni), phosphorus (P), and potassium (K) were compared in 12 wet …
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
15 pages.
The Protection Of Instream Flows In Montana: A Legal-Institutional Perspective, Matthew J. Mckinney, Gary Fritz, Patrick Graham, Deborah Schmidt
The Protection Of Instream Flows In Montana: A Legal-Institutional Perspective, Matthew J. Mckinney, Gary Fritz, Patrick Graham, Deborah Schmidt
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
42 pages.
Contains references.
Oregon’S Minimum Perennial Streamflows, John Borden
Oregon’S Minimum Perennial Streamflows, John Borden
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
12 pages.
The Gardener’S Ethic And Other Lessons From Forest Planning [Outline], Peter M. Emerson
The Gardener’S Ethic And Other Lessons From Forest Planning [Outline], Peter M. Emerson
The Public Lands During the Remainder of the 20th Century: Planning, Law, and Policy in the Federal Land Agencies (Summer Conference, June 8-10)
4 pages.
Contains references.
Pollution In Parks: A Publication Of The National Park Service, Richard H. Briceland
Pollution In Parks: A Publication Of The National Park Service, Richard H. Briceland
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
28 pages (includes illustrations).
Contains references.
External Development: Turning Problems Into Opportunities, T. Destry Jarvis
External Development: Turning Problems Into Opportunities, T. Destry Jarvis
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
9 pages.
After The Concrete Sets: The Future Role Of The Bureau Of Reclamation In Western Water Management, John D. Leshy
After The Concrete Sets: The Future Role Of The Bureau Of Reclamation In Western Water Management, John D. Leshy
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
23 pages.
Contains references.
Innovative Approaches To Water Allocation: The Potential For Water Markets, Charles W. Howe
Innovative Approaches To Water Allocation: The Potential For Water Markets, Charles W. Howe
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
20 pages.
Long-Term Effects Of Tillage On The Retention And Transport Of Soil Water, H. D. Scott, L. S. Wood, W. M. Miley
Long-Term Effects Of Tillage On The Retention And Transport Of Soil Water, H. D. Scott, L. S. Wood, W. M. Miley
Arkansas Water Resources Center Technical Reports
Quantitative measurements were made of the physical and chemical properties of two virgin prairie soils, Crowley and Jay, that remain in their native Arkansas environments and of similar soils that had been tilled extensively. Comparisons were made of soil properties at several depths. When compared with the tilled soils the virgin soils had higher organic matter contents, saturated hydraulic conductivities and water retained at several applied pressures. Bulk densities and hydraulic resistances were lower in the virgin soils. For the Crowley silt loam, values of pH and elemental contents of the virgin soil were higher than those of the tilled …
Innovative Transfer And Exchange Plans, Glenn E. Porzak
Innovative Transfer And Exchange Plans, Glenn E. Porzak
Colorado Water Issues and Options: The 90's and Beyond: Toward Maximum Beneficial Use of Colorado's Water Resources (October 8)
36 pages (includes maps).
Contains footnotes (page 32).
Water Quality For Irrigation, P R. George
Water Quality For Irrigation, P R. George
Journal of the Department of Agriculture, Western Australia, Series 4
Although irrigation and salinity problems are frequently inseperable, there is a range of management methods that can be used to handle marginal quality water. Freuently these methods are simple, but require careful planning.
The wide range in tolerance of crops to salinity can be exploiter to ensure that appropriate crops are selected for the water available.
Because crops vary in their sensitivity to salt uptake in the leaves or the roots, watering methods can be changed to avoid problems. For profitable production enough water should be applied to ensure adequate water is available for plant growth as well as to …
Groundwater Quality And Mineral Deposits Relationships In The Ozark Mountains, Kenneth F. Steele
Groundwater Quality And Mineral Deposits Relationships In The Ozark Mountains, Kenneth F. Steele
Arkansas Water Resources Center Technical Reports
Ninety-nine groundwater sites were sampled in northern Arkansas in order to determine the effect of local manganese, phosphate, pyrite, lead-zinc and uranium mineralization on the groundwater chemistry. Most of this study (75 springs) was concentrated in the Batesville manganese district. Hydrogeochemical exploration for these types of manganese deposits appears possible with 44 percent of the springs within 2000 feet of mineralization having anomalous metal concentrations (especially manganese). Because only a few springs were sampled in the remaining areas, the results are not conclusive; however, only the pyrite and small lead-zinc deposit would appear worthy of additional investigation. None of the …
Comparing Three Water Quality Sampling Techniques For Measuring Non-Point Source Pollution In Forest Streams, R. Scott Beasley
Comparing Three Water Quality Sampling Techniques For Measuring Non-Point Source Pollution In Forest Streams, R. Scott Beasley
Arkansas Water Resources Center Technical Reports
Coshocton wheel samplers, ISCO pumping samplers, and single stage samplers were compared on each of three small (5-6 ha), forested watersheds in the Ouachita Mountains of central Arkansas. The objective of the comparisons was to evaluate the performance of each sampling method in providing reliable samples for measuring concentrations of total suspended solids (TSS). H-flumes and water level recorders provided stream discharge data; a network of recording and non-recording raingages provided preciptation measurements. Rainfall and storm discharges during the study period were unusually low. No samples were collected by the single stage samplers. They appear unsuited for use on small …
Quality Of Surface Water In Bell County, Kentucky, Robert B. Cook Jr., Reese E. Mallette
Quality Of Surface Water In Bell County, Kentucky, Robert B. Cook Jr., Reese E. Mallette
Information Circular--KGS
Reconnaissance data for surface waters in Bell County, Kentucky, have been gathered in response to the anticipated need for baseline information related to Federal and State surface-mining regulations. Bell County is particularly well suited for such a study due to past and current coal mining, the widespread distribution of mining and diversity of stratigraphic units affected, the diverse array of both disturbed and undisturbed drainage basins, and the relative ease of access within the county.
Estimated flow rate, temperature, pH, conductivity, and concentration of iron, manganese, and suspended solids were determined for flowing waters collected at 71 scattered sites. Sample …
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
KWRRI Research Reports
This project was designed to determine the effects of nitrogen fertilization on the quality and quantity of streamflow eminating from an eastern hardwood forest watershed. A 40.67 ha watershed, located in mountainous eastern Kentucky, was aerially fertilized in late April 1975. The forest stand was principally oak, hickory, and yellow poplar, 50 - 55 years of age and in a relatively undisturbed condition. A helicopter applied anunonium nitrate at a rate of 504 kg/ha. Because a large part of applied nitrogen fertilizer ends up in the highly mobile nitrate nitrogen.form, this is the principal ion monitored in this study. No …
Final Report Buffalo National River Ecosystems Part Iv, R. E. Babcock, E. E. Dale, R. L. Meyer, D. G. Parker, E. G. Smith, M. D. Springer
Final Report Buffalo National River Ecosystems Part Iv, R. E. Babcock, E. E. Dale, R. L. Meyer, D. G. Parker, E. G. Smith, M. D. Springer
Arkansas Water Resources Center Technical Reports
Sampling point locations and analytical procedures remained unchanged from those outlined in previous Buffalo National River Ecosystem reports. The only significant change in analytical procedures was a reversion to the glass fiber filter method for collection and extraction of samples for chlorophyll analysis. This change was neeessitated by a need for filtering a larger volume to obtain enough chlorophyll for an accurate measurement. Samples were collected monthly from April 9 through December 30. No samples were taken in January or February due to the extremely uncertain traveling conditions caused by the frequent snows. Prior research indicates that the December 30 …