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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 Jun 1991

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 Jun 1991

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 Jun 1991

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 Jun 1990

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 Jun 1990

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 Jun 1990

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 Jan 1990

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 Jun 1989

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 Jun 1989

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 Jun 1989

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 Jan 1989

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. …


County-Based Priority Assessment Methodology For Phasing Of Wellhead Protection Programs, H. O. Pfannkuch, M. E. Campion, D. C. Mccaa, J. M. Palenberg Jan 1989

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 Jan 1989

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 Jun 1988

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 Apr 1988

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 Mar 1988

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 Mar 1988

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 Jun 1987

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 Sep 1986

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 Sep 1986

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 Jun 1986

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 Jun 1986

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 Jun 1986

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 Oct 1985

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 Jan 1985

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 Sep 1984

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 Mar 1981

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 Jan 1981

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 Oct 1978

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 Jan 1978

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 …