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Articles 1561 - 1590 of 1686

Full-Text Articles in Water Resource Management

An Analysis Of East Pond And The Serpentine Watersheds In Relation To Water Quality, Problems In Environmental Science Course (Biology 493), Colby College, Colby College Jan 1991

An Analysis Of East Pond And The Serpentine Watersheds In Relation To Water Quality, Problems In Environmental Science Course (Biology 493), Colby College, Colby College

Colby College Watershed Study: East and North Ponds (2011, 1999, 1996, 1991)

The Belgrade Lakes in central Maine are important local ecological and recreational resources. The belgrade chain includes the following lakes: East Pond, North Pond, Great Pond, Long Pond, Salmon Lake and Messalonskee Lake. These lakes are all interconnected within the system driving into the Kennebec River through the Messalonskee Stream (Garrity and Putnam, 1971). East Pond is the first lake in the lake chain and it plays a pivotal role in influencing subsequent lakes. Therefore, the water quality of this lake is important not only to East Pond residents but to the residents of the entire lakes region.

East pond …


A Study Of Periphyton, Sediment And Diatom Community Structure As Monitors Of Heavy Metal Pollution In The Embarras River And Brushy Fork, David L. Vaultonburg Jan 1991

A Study Of Periphyton, Sediment And Diatom Community Structure As Monitors Of Heavy Metal Pollution In The Embarras River And Brushy Fork, David L. Vaultonburg

Masters Theses

The purpose of this study was to evaluate periphyton (diatom) and sediment heavy metal content and diatom community structure as potential monitors of heavy metal pollution in the upper reaches of the Embarras River system. The study was initiated due to recent industrialization in the area which could potentially contribute to the present heavy metal burden of Brushy Fork and the Embarras River. These streams are already subject to agricultural runoff, wastewater plant effluent, landfill leachate and other miscellaneous urban and highway runoff. The Embarras River system drains an area of approximately 2800 square miles in 11 east-central Illinois counties …


Littoral And Limnetic Zooplankton Communities In Lake Mead, Nevada-Arizona, Usa, Patrick J. Sollberger, Larry J. Paulson Jan 1991

Littoral And Limnetic Zooplankton Communities In Lake Mead, Nevada-Arizona, Usa, Patrick J. Sollberger, Larry J. Paulson

Publications (WR)

Zooplankton were collected from adjacent littoral and limnetic sites in Lake Mead, Nevada-Arizona, USA. Limnetic species dominated both littoral and limnetic zooplankton communities; littoral species rarely exceeded 2% of monthly total zooplankton densities. Low species richness of littoral taxa and high similarity in species composition between littoral and limnetic habitats appeared to result from uniform horizontal physical and chemical environments, due to horizontal mixing, and from the absence aquatic macrophytes. Significant differences in spatial distribution occurred in phytoplankton biomass, total zooplankton density, and fish "abundances; highest concentrations of these factors occurred nearest an inflow high in nutrients and progressively declined …


Lake Mead Nutrient Enhancement Project, Peter D. Vaux, Larry J. Paulson, Nevada Department Of Wildlife, National Oceanic And Atmospheric Administration Dec 1990

Lake Mead Nutrient Enhancement Project, Peter D. Vaux, Larry J. Paulson, Nevada Department Of Wildlife, National Oceanic And Atmospheric Administration

Publications (WR)

The Lake Mead Fertilization Project is a research program designed to investigate the potential for using large-scale artificial fertilization to enhance the game fisheries of this reservoir through an increase in the population of threadfin shad, the system's primary forage species. A substantial decline in the population of largemouth bass, together with poor condition of adult striped bass, are the two major issues affecting the Lake Mead game fisheries. Both issues have been hypothesized to be a result of an inadequate amount of forage in the reservoir. Previous studies have in turn suggested that a major factor limiting the shad …


Bulletin No 4174 - Tree Planting On Farms In High Rainfall Areas, Ken Angell Jul 1990

Bulletin No 4174 - Tree Planting On Farms In High Rainfall Areas, Ken Angell

Bulletins 4000 -

Many of the techniques described in this Bulletin are applicable to broadacre farms. However, they are specifically directed to small rural properties in the high rainfall areas.

Trees can usually serve more than one purpose on small rural properties. They can be used as ornamentals, to provide shelter and shade, for erosion control, as a wildlife habitat, or for waterlogging and salinity control.


Enhancement And Monitoring Of The Procambarus Clarkii Population In Lake Mead, Mikell Beth Hager May 1990

Enhancement And Monitoring Of The Procambarus Clarkii Population In Lake Mead, Mikell Beth Hager

Publications (WR)

Procambarus clarkii are found in extremely low numbers throughout Lake Mead, AZ-NV. The crayfish are an important dietary component for game fish. Enhancement of the crayfish population would broaden the fishery forage base. Crayfish were stocked and monitored in a study cove on Saddle Island to determine if the Procambarus clarkii population could be enhanced. A trapping survey of the area after the following reproductive season yielded low numbers of crayfish. A comparison of pre-stocking and post-stocking catch per trap day (CPTD) values revealed no significant increase in the population. Procambarus clarkii growth is limited by environmental factors in Lake …


A “Drastic” Evaluation Of The Ground-Water Pollution Potential Of Karst Terrain: Lost River Ground-Water Basin, Warren County, Kentucky, David Baize Apr 1990

A “Drastic” Evaluation Of The Ground-Water Pollution Potential Of Karst Terrain: Lost River Ground-Water Basin, Warren County, Kentucky, David Baize

Masters Theses & Specialist Projects

Karst terrains, such as the Lost River Karst Ground-Water Basin, are extremely vulnerable to ground-water contamination. Seven physical factors: depth to water, recharge, aquifer media, soil media, topography, impact of the vadose zone, and hydraulic conductivity, are evaluated using the DRASTIC system to determine the ground-water pollution potential of the study area. A numerical value is calculated for each of the seven factors, and a map layer for each factor is produced. These layers are then “added” together to produce a DRASTIC ground-water pollution potential map. The effectiveness of each factor in evaluating the pollution potential of karst terrain is …


What Are Land Conservation Districts?, Western Australian Department Of Agriculture Jan 1990

What Are Land Conservation Districts?, Western Australian Department Of Agriculture

Natural resources published reports

Land conservation groups need your support. Land degradation is not just a farming problem. We change the land and waters in many ways, whether it be clearing of precious natural bush or through the fertilizers which leach from our gardens.

By learning about the Land Conservation Districts achievements and understanding the challenges they face we can better see our own place in the scheme of things.

We will learn the ways to organize for Landcare in other rural areas, or in the city, that will be successful.

This is what the Decade of Landcare is all about - providing an …


Effects Of Ambient Lake Mohave Temperatures On Development, Oxygen Consumption, And Hatching Success Of The Razorback Sucker, Michael A. Bozek, Larry J. Paulson, Gene R. Wilde Jan 1990

Effects Of Ambient Lake Mohave Temperatures On Development, Oxygen Consumption, And Hatching Success Of The Razorback Sucker, Michael A. Bozek, Larry J. Paulson, Gene R. Wilde

Publications (WR)

Spawning of razorback suckers, Xyrauchen texanus, in Lake Mohave occurred from 10-22° C and larvae were collected at water temperatures from 10-15° C in 1982 and 1983. In the laboratory, hatching success was similar from 12-20° C, but reduced hatching success was found at 10° C while none hatched at 8°C. Development rate and oxygen consumption were positively related to incubation temperature. Direct effects of ambient Lake Mohave water temperatures on hatching success of razorback sucker embryos are considered minimal. Historical spawning temperatures for the species are hypothesized based upon successful incubation temperatures and comparison to the white sucker, …


Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle Jun 1989

Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle

Publications (WR)

Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of a larger, game fishery enhancement study (Lake Mead Fertilization Project), designed to assess feasability of increasing survivorship of larval/juvenile shad by boosting phosphate levels, thereby increasing algal and zooplankton biomass, during the shad spawning period. Shad are the primary forage base for the striped bass (Morone saxatilis) and black bass (Macropterus salmoides) fisheries. Weekly samples were …


Total Maximum Daily Loads And Waste Load Allocations For Las Vegas Bay: Rationale And Calulations, State Of Nevada: Division Of Environmental Protection May 1989

Total Maximum Daily Loads And Waste Load Allocations For Las Vegas Bay: Rationale And Calulations, State Of Nevada: Division Of Environmental Protection

Publications (WR)

In September 1987 the Nevada Division of Environmental Protection revised Water Quality Standards for Las Vegas Wash (LVW) and Lake Mead. Standards were set for chlorophyll-a and unionized ammonia in Las Vegas Bay (LVB) (NDEP 1987). The 1986 and 1987 LVB data showed non-achievement of both the chlorophyll-a and unionized ammonia standard which triggered an analysis of total phosphorus and total ammonia Total Maximum Daily Loads and Waste Load Allocations which are presented in this report. This report is separated into three sections: 1. 1987 Las Vegas Bay Water Quality Conditions and Seasonal Periodicity. 2. Concentration Estimates at Northshore Road …


Limnological Monitoring Data For Lake Mead During 1988, Suzanne E. Leavitt, Larry J. Paulson, State Of Nevada: Division Of Environmental Protection Apr 1989

Limnological Monitoring Data For Lake Mead During 1988, Suzanne E. Leavitt, Larry J. Paulson, State Of Nevada: Division Of Environmental Protection

Publications (WR)

Limnological monitoring was conducted in Las Vegas Bay and Boulder Basin from April to December of 1988. The purpose of the monitoring was to (i) document possible changes in water quality resulting from decreased phosphorus loading and increased ammonia in Las Vegas Wash, and (ii) establish a data base for evaluating the adequacy of water quality standards.


Red Swamp Crayfish Ecology In Lake Mead, Suzanne E. Leavitt, Jennifer Stephens Haley, Mikell Hager, Donald H. Baepler, Nevada Department Of Wildlife Mar 1989

Red Swamp Crayfish Ecology In Lake Mead, Suzanne E. Leavitt, Jennifer Stephens Haley, Mikell Hager, Donald H. Baepler, Nevada Department Of Wildlife

Publications (WR)

Red swamp crayfish (Procambarus clarkii) were trapped in Flamingo Wash, an urban wash of Las Vegas, during four periods of 1988. Life history and reproductive success were determined. The trapped crayfish were marked and released into a study cove in Lake Mead as part of an experimental stocking program. Retrap data from the study cove were used to determine life history, habitat preferences, and movement patterns of the stocked crayfish. In addition, a literature search was done on red swamp crayfish ecology, including food preferences, life history, habitat preferences and fish predation.


An Analysis Of The Factors Influencing Eutrophication Within The China Lake Watershed, Student Collective Organized Against Lake Eutrophication, Colby College, Problems In Environmental Science Course (Biology 493), Colby College Jan 1989

An Analysis Of The Factors Influencing Eutrophication Within The China Lake Watershed, Student Collective Organized Against Lake Eutrophication, Colby College, Problems In Environmental Science Course (Biology 493), Colby College

Colby College Watershed Study: China Lake (2005, 1989)

Lake eutrophication is the natural process of aging in the lake body with establishment and multiplication of organism over time. The sediment and decaying matter accumulate, gradually filling in the lake basin, transforming the lake from a deep lake to dry land. This process affects the physical make-up of the lake as well as the ecological and biological composition. Eutrophication usually takes thousands of years. However, human interference has greatly accelerated the process by increasing rates of sedimentation and phosphorus loading. China lake has undergone accelerated eutrophication in recent years causing a growing concern for water quality. Algal populations, stimulated …


Agenda For Action - Casco Bay, Department Of Environmental Protection Jan 1989

Agenda For Action - Casco Bay, Department Of Environmental Protection

Maine Collection

Agenda For Action - Casco Bay

Department of Environmental Protection, Augusta, Maine (January, 1989)

Contents: Introduction / The Problems : Bacteria, Toxics, Nutrients / The Solutions / Recommendations / References


Maine Nonpoint Source Pollution Assessment Report, Bureau Of Water Quality Control Jan 1989

Maine Nonpoint Source Pollution Assessment Report, Bureau Of Water Quality Control

Maine Collection

Maine Nonpoint Source Pollution Assessment Report

Prepared by the Maine Department of Environmental Protection, Bureau of Water Quality Control, Augusta, Maine 1989.

Contents: Executive Summary / Introduction / Methodology / Statewide Water Quality Summary / State And Local Agency Programs for Control of Nonpoint Source Pollution / Process for Identification of Best Management Practices and Associated Standards / List of References / List of Figures / List of Tables



Saltland Management, Tim Negus Jan 1989

Saltland Management, Tim Negus

Natural resources published reports

Salt land problems in Western Australia are categorized into one of three types:

* Valley waterlogging

* hillside seepage

* dry land salt


Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon Jun 1988

Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

24 pages.

Contains 3 pages of references.


Bay/Delta Standards Memorandum And Exhibits, Thomas J. Graff Jun 1988

Bay/Delta Standards Memorandum And Exhibits, Thomas J. Graff

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

47 pages.


The 1987 Nonpoint Source Pollution Amendments And State Progress Under The New Program, John H. Davidson Jun 1988

The 1987 Nonpoint Source Pollution Amendments And State Progress Under The New Program, John H. Davidson

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

143 pages.

Contains 4 pages of references.


Antidegradation And Nonpoint Source Pollution In The West, H. Michael Anderson Jun 1988

Antidegradation And Nonpoint Source Pollution In The West, H. Michael Anderson

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

31 pages.

Contains references.


Soil Erosion, Agrichemicals And Water Quality: A Need For A New Conservation Ethic?, Christine Olsenius Jun 1988

Soil Erosion, Agrichemicals And Water Quality: A Need For A New Conservation Ethic?, Christine Olsenius

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

24 pages.

Contains references.


The San Joaquin–Sacramento Delta, David R. Beringer Jun 1988

The San Joaquin–Sacramento Delta, David R. Beringer

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

20 pages.

Contains 2 pages of references.


Public Land Livestock Grazing, Water Quality And Riparian Ecosystems: The Evolving Legal And Technical Context, Richard H. Braun Jun 1988

Public Land Livestock Grazing, Water Quality And Riparian Ecosystems: The Evolving Legal And Technical Context, Richard H. Braun

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

8 pages.

Contains 1 page of references.


Legal Issues: San Francisco Bay, Sacramento-San Joaquin River Delta And Estuary, Stuart L. Somach Jun 1988

Legal Issues: San Francisco Bay, Sacramento-San Joaquin River Delta And Estuary, Stuart L. Somach

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

48 pages.

Contains footnotes.


Federal Groundwater Quality Control: Law And Policy, Robert L. Glicksman Jun 1988

Federal Groundwater Quality Control: Law And Policy, Robert L. Glicksman

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

56 pages.

Contains references.


Water Rights Implications Of Water Quality Regulation In Colorado, Lawrence J. Macdonnell Jun 1988

Water Rights Implications Of Water Quality Regulation In Colorado, Lawrence J. Macdonnell

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

40 pages.


Effluent: Making Use Of A Valuable Resource In Arizona, Kathleen Ferris Jun 1988

Effluent: Making Use Of A Valuable Resource In Arizona, Kathleen Ferris

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

40 pages.

Contains references.


Pesticide Contamination Of Groundwater: Superfund Liability?, David R. Andrews Jun 1988

Pesticide Contamination Of Groundwater: Superfund Liability?, David R. Andrews

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

12 pages.

Contains references.


A Proposal For An Outrageous, Albeit Effective, Strategy To Prevent Groundwater Pollution, George Cameron Coggins Jun 1988

A Proposal For An Outrageous, Albeit Effective, Strategy To Prevent Groundwater Pollution, George Cameron Coggins

Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)

14 pages.