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Water Quality Study Of Lake Mead, Dale A. Hoffman, Paul R. Tramutt, Frank C. Heller, Bureau Of Reclamation

Publications (WR)

This report presents Lake Mead Water quality data obtained from 1964 to 1966. The effect of filling Lake Powell on the water quality of Lake Mead is evaluated. General limnological principles and the present limnology of Lake Mead are discussed. Lake Mead has a warm monomictic annual temperature cycle characterized by summer stratification, fall overturn leading into a continuous circulation throughout the winter; temperatures never fall below 39 deg F (4 deg C). During stratification, lower dissolved oxygen values were recorded in the thermocline than in the epilimnion and hypolimnion. Mineral content increases from the upper to the lower end …

L.A. General Data, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Mill Pollution, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Biochemical Activity, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Press Reports, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Problems In County-Wide Rodent Control Programming, Loring White

Vertebrate Pest Conference Proceedings: 3rd (1967)

Vertebrate pest control is recognized and sanctioned as a legitimate function of county government in California, not only by statute but also by a century of tradition. This is an anomaly. Ordinarily, regulatory agricultural pest control programs are part of our plant quarantine system, undertaken against newly introduced pests or those which are not of common occurrence. Programs against vertebrate pests, on the other hand, are carried on where the species involved are common, usually are abundant and often are indigenous. The reason for this lies buried in a bit of history that is very pertinent to my subject.

The Current Status Of Plague In California, Keith F. Murray

Vertebrate Pest Conference Proceedings: 3rd (1967)

At the first Vertebrate Pest Control Conference in 1964, I traced the history of plague control in California and outlined a revised approach, based on newer concepts of plague ecology. In our state of relative ignorance, this required a number of unproved assumptions about plague occurrence in California that verged on crystal ball gazing. These were principally that (1) plague persists in relatively resistant rodent species in certain favorable locations, (2) ground squirrels and chipmunks experience periodic epizootics, but are not permanent reservoirs, (3) plague "foci" of the past were merely sites of conspicuous epizootics, they did not necessarily correspond …

Good Practice In Vertebrate Pest Control, Philip J. Spear

Vertebrate Pest Conference Proceedings: 3rd (1967)

Good practice in pest control is a responsibility of several elements in our democratic, free-enterprise society. Most notably, these are: (1) the general public, (2) responsible government agencies and (3) industry. Before I comment about the responsibilities of each of these three groups, let me tell you about the work of structural pest control operators and their interests in vertebrate pest control. The pest control industry which I discussed in detail at the Second Vertebrate Pest Control Conference (1) continues to grow and expand its fields of activity. At the present time, it is our estimate (2) that 26,700 persons …

Blackbird Behavior, Gordon W. Boudreau

Vertebrate Pest Conference Proceedings: 3rd (1967)

A knowledge and understanding of a bird's habits and behavior patterns is prerequisite to any intelligent approach toward solving problems created by that species. This also applies to associated species commonly observed with it. Since my subject today is blackbirds I will confine my observations to species in this group, particularly red-winged blackbirds. The Red-Winged Blackbird, (Agelaius phoeniceus) is numerically and economically the most important. Several sub-species or races are recognized and in California the most important of these is the Bi-colored Blackbird, (A. p. californica). The ranges of subspecies commonly overlap, particularly in the Southeast, and field identification is …

Role Of The Agricultural Extension Service In Vertebrate Pest Control, Marvin D. Davis

Vertebrate Pest Conference Proceedings: 3rd (1967)

Frankly, I often wonder what our role is in vertebrate pest control. It seems to me that we in A.E.S, are frequently treading in the "twilight zone" of pest control. This is because of the wide diversity of problems which arise within an area such as I represent. I feel it is most significant that our county was invited to cover the role of A.E.S. in vertebrate pest control and discuss the tremendous variations and considerations necessary to serve an urban/semi-urban to rural county. Those of you familiar with San Mateo County readily recognize the potential problems due to population …

Biological Control Of Vertebrate Pests, Walter E. Howard

Vertebrate Pest Conference Proceedings: 3rd (1967)

This paper briefly introduces the subject of vertebrate pest control, integrates and interprets some important ecological principles of control methodology, and intercalates these discussions with analysis of the biological backlashes and other ecological interactions that may be created whenever troublesome species of vertebrates are controlled by biological means. Insight in this area must be deepened if we are to fulfill our primary objective of learning how to manage a healthy environment in perpetuity. One important merit of biocontrol is that most people accept carefully planned ecological dislocations in nature more readily than they do the repugnant and hazardous aspects of …

Recent Developments In The Control Of Vertebrate Problem Animals In The Province Of The Cape Of Good Hope, Republic Of South Africa, Douglas Hey

Vertebrate Pest Conference Proceedings: 3rd (1967)

In an earlier paper (Hey, 1964 an account was given of the topography and climate of the Cape Province, a description of the vertebrate animals and birds which might be considered to fall in the category of problem animals and the control methods used. The present paper will, therefore, deal with advances in control techniques which have since been made. At this juncture, it would be appropriate to record our sincere appreciation to the Director and Staff of the U.S. Fish and Wildlife Service and particularly to the Senior Officers of the Denver Research Center, District Agents Malcolm Allison and …

Epizootic Ecology In The Training Program Of The Vector-Borne Disease Section, Harold E. Stark

Vertebrate Pest Conference Proceedings: 3rd (1967)

To fulfill the primary objective of the Vector-Borne Disease Section of NCDC to reduce the incidence of vector-borne diseases - a series of courses on vertebrates and arthropods and their role as reservoirs, vectors, and disease-causing agents is presented. Literature is prepared and a museum is maintained. One of these courses, Epizootic Ecology, illustrates some of the aspects dealt with in these courses. Definitions and concepts are presented followed by a brief review of principles of epidemiology and ecology. Specific examples constitute the bulk of the course. One of these, tularemia, is especially useful for the purposes of this course …

Arkansas Water Resources: Supply, Use, And Research Needs, Jared Sparks

Arkansas Water Resources Center Technical Reports

The purpose of this study is to identify Arkansas’ water resources research needs against an economic backdrop of water supply and use conditions existing in the state. In the aggregate Arkansas has an abundance of high quality water relative to present use. There are local conditions that give rise to water problems, but, in general, critical water problems in Arkansas are emergent and potential rather than actual. The causes of these problems are to be found, in large part, in the economic, legal, and social institutions surrounding water use--and particularly in the economic institutions. Research designed to improve economic efficiency …

Quantitative Analysis Of Stream Flow Rate Extremes, Hugh M. Jeffus

Arkansas Water Resources Center Technical Reports

Stream discharge data for the State of Arkansas is analyzed for representative statistical parameters. The statistical distribution most applicable to stream discharge data in Arkansas is the Pearson type III skew frequency curve. The parameters of the Pearson type III curve for all available records in Arkansas are included as Appendix A. The parameters of the logarithmically normal frequency distribution are included as Appendix B for mean daily discharge, minimum daily discharge and instantaneous minimum daily discharge. The logarithmically normal frequency distribution may be used for the lower discharge rates in lieu of the Pearson type III distribution except where …

The Structure Of Germination In Pinus Lambertiana Dougl., Graeme P. Berlyn

Yale School of the Environment Bulletin Series

No abstract provided.

Thermophysical Properties Of Bark Of Shortleaf, Longleaf, And Red Pine, William E. Reifsnyder, Lee P. Herrington, Karl W. Splat

Yale School of the Environment Bulletin Series

No abstract provided.

Land Grading In South West Irrigation Areas, 1966-67, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

Land grading in the South West Irrigation Areas with modern earth moving equipment first commenced in 1949.

The advantages of land grading are well recognised by farmers and this season grading operations were carried out on 208 farms.

Fox-Prey Relationships In Eastern South Dakota, Robert L. Drieslein

Electronic Theses and Dissertations

Relationships between red foxes (Vulpes fulva) end their principal prey, particularly ring-necked pheasants (Phasianus colchicus), were studied on four units in eastern South Dakota from December 1964 to September 1966. Each unit was composed of a 100-square-mile "reduction area," on which fox populations were reduced, and a 100-square-mile "check area," on which fox populations were not reduced for the study. Indices to populations of foxes, pheasants, mice, eastern cottontails (Svlvilagus floridanus) and whitetail jackrabbits (Lepus townsendi) were obtained and used to evaluate food habits and the effect of predator reduction on prey populations. Four-hundred seventeen stomachs and 104 female reproductive …

Movement Of Forage Fishes In A South Dakota Stream, Thomas P. Felix

Electronic Theses and Dissertations

Movement patterns of Semotilus atromaculatus, Rhinichthvs atratulus, Campostoma anomalum and Catostomus commersoni were investigated in an eastern South Dakota stream for a period of one year. Electrofishing, fin clipping and a multiple census method were employed. Population structures were estimated for each species. Populations were considered unstable due to the occurrence of appreciable emigration and immigration between sampling periods. Differential size class mobility was established for all species. Species exhibited upstream movement tendencies during the summer and more random movement tendencies during the fall. Size classes of S.atromaculatus, R. atratulus, and C. anomalum showed differential upstream movement affinities. Considerable growth …

Derivation Of Reservoir Operating Rules By Economic Analysis, Charles O. Dowell

KWRRI Research Reports

The purpose of this study was to develop a methodology for determining an optimum set of reservoir operating rules specifying the of storage space based on the example of Rough River Reservoir, a Corps of Engineers project in Breckinridge and Grayson Counties, Kentucky, and assuming this multipurpose reservoir provides flood control, water supply, and recreation. The operating rules were derived by the method of marginal analysis which uses as its criteria achievement of maximum net benefits from the available storage capacity.

Benefit relationships were derived for each use. The variation of flood control benefits with available flood storage was determined …

Feasibility Study Of A Capacitance-Type Electronic Sediment-Sensing Device, C. Earl Israelsen, Duane G. Chadwick

Reports

Difficulties caused by sediment carried in natural streams have existed since earliest times. Although instruments and techniques for measuring stream discharge have existed for many years, only recently have attempts been made to measure sediment carried by the streams. The earliest observations of sediment discharge in the United States were made by Captain Talcott in the Mississippi River in 1838 (1). More or less continuous samples of sediment from the Rio Grande have been collected by the United States Geological Survey since 1879, and from the Colorado River Basin since 1925. Studies of sediment transport are seriously hampered by the …

Control Of Air Pollution Through The Assertion Of Private Rights, Julian Conrad Juergensmeyer

Articles by Maurer Faculty

Air pollution is clearly one of the major social problems confronting contemporary American society. Yet the United States is still without an effective federal pollution control program, and those state and local control programs that do exist are largely ineffective. Until government regulation is able to keep the expulsion of air contaminants within tolerable limits, it will be necessary for those seeking to control air pollution to rely upon the assertion of private rights. In this article the author discusses the principal causes of action available to the private pollution controller, and concludes that, although traditional legal concepts may provide …

Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 4 - Weirs, Gaylord V. Skogerboe, M. Leon Hyatt, Lloyd H. Austin

Reports

No abstract provided.

Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 2 -Parshall Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Joe D. England, J. Raymond Johnson

Reports

No abstract provided.

Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 1 - Submerged Flow, Gaylord V. Skogerboe, M. Leon Hyatt, Keith O. Eggleston

Reports

No abstract provided.

Finite Difference Solutions To Free-Surface Flow Through Nonhomogeneous Porous Media, Roland W. Jeppson

Reports

No abstract provided.

Influences Of Exposure On Pan Evaporation In A Mountainous Area, Eugene L. Peck

Reports

The effects of exposure on pan evaporation rates were studied at the Davis County Experimental Watershed near Farmington, Utah, by operating a network of 12 class A evaporation stations on the watershed during the summer months of 1962 through 1966. Standard Weather Bureau observations on a daily basis were obtained from a total of 17 different sites representing widely idverse topography with a vertical range of 4, 630 feet. Deviations from mean relations with elevation on monthly values of observed meteorological factors were found to be related to the type of exposure. Dewpoint observations on different slopes were found to …

Proceedings Of A Symposium: Pollution Control Of Industrial Wastewaters, Calvin K. Sudweeks, Lynn M. Thatcher, Elmo Morgan, Franklin J. Agardy, R. E. Pailthorp, John C. Merrell Jr.

Reports

No abstract provided.

Groundwater Development In Arid Basins, Dean F. Peterson Jr., Harold E. Thomas, J H. Feth, P. H. Mcgauhey, James H. Milligan, Wayne D. Criddle, Judge Lewis Jones, Dallin W. Jensen, Calvin G. Clyde, Bartell C. Jensen, C. E. Jacob, Jay R. Bingham, E. O. Larson

Reports

Summary: Groundwater development frequently provides a means whereby tremendous new economic opportunities are opened up. If supplies are overdrawn (mined) the ensuing regional economy may be able to affort replacements from more costly sources. In the United States the Salt River Valley of Arizona and the valleys of California provide examples. Two cases are treated in this paper, Israel and West Pakistan. In Israel, besides furnishing more than half of the basic source of water suppply, groundwater development provides opportunity for both quantity and quality management, which makes possible use of surface supplies and reclaimed sewage as firm rather than …