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Articles 8161 - 8190 of 8567
Full-Text Articles in Physical Sciences and Mathematics
Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson
Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson
Publications (WR)
Lake Mead was impounded in 1935 by the construction of Hoover Dam. The Colorado River was unregulated prior to then and therefore was subjected to extreme variations in flows and suspended sediment loads. Hoover Dam stabilized flows and reduced suspended sediment loads downstream, but Lake Mead still received silt-laden inflows from the upper Colorado River Basin. The Colorado River contributed 97% of the suspended sediment inputs to Lake Mead, and up to 140 x 1O6 metric tons (t) entered the reservoir in years of high runoff. Most of the sediments were deposited in the river channel and formed an …
The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson
The Effects Of Limited Food Availability On The Striped Bass Fishery In Lake Mead, John R. Baker, Larry J. Paulson
Publications (WR)
The original range of striped bass (Morone saxatilis) was along the Atlantic Coast. They were introduced into the lower Sacramento River in 1879 and are now also found along the Pacific Coast. A landlocked striped bass fishery was established in Santee-Cooper Reservoir, South Carolina, in 1954, and they have since been introduced into numerous other reservoirs, including Lake Havasu, Lake Mead and Lake Powell on the Colorado River. Striped bass were introduced into Lake Mead in 1969 in response to declines in the largemouth bass (Micropterus salmoides) fishery that occurred during the 1960s and in order to further utilize the …
Use Of Hydroelectric Dams To Control Evaporation And Salinity In The Colorado River System, Larry J. Paulson
Use Of Hydroelectric Dams To Control Evaporation And Salinity In The Colorado River System, Larry J. Paulson
Publications (WR)
The main stem reservoirs on the Colorado River comprise one of the largest and most heavily used freshwater bodies in the nation. These reservoirs (Lake Powell, Lake Mead, Lake Mohave and Lake Havasu) can store up to 53,590,400 acre-feet of water at their maximum capacities. Nonetheless, local water shortages still exist in some areas of the Colorado River Basin. There is also concern that salt concentrations are approaching levels that could severely affect municipal and agricultural uses. Water shortages will become even more acute as demands for water increase with continued urban and agricultural development in the basin.
Water conservation …
Scientific Perspectives On Integrated Aquatic Resources Management Of The Colorado River, Larry J. Paulson
Scientific Perspectives On Integrated Aquatic Resources Management Of The Colorado River, Larry J. Paulson
Publications (WR)
When management requires water quality standards, we should establish standards in a scientific and logical manner to serve the long-term needs of the users. It was this very process that led to enactment of the Reclamation Act of 1902 and the Boulder Canyon Project Act of 1928 - legislation that still serves the needs of users in the Colorado River Basin. This process can work again if we can make the "tradeoffs" that are so vital in management of a multi-purpose river.
In order to do this, however, we must first be able to identify "tradeoffs." This requires good scientific …
The Effects Of Impoundments On Salinity In The Colorado River, Larry J. Paulson, John R. Baker
The Effects Of Impoundments On Salinity In The Colorado River, Larry J. Paulson, John R. Baker
Publications (WR)
The increase in salinity of our western rivers has been identified as one of the most serious water quality problems in the nation. This is of special concern in the Colorado River where salinity has increased from pristine levels estimated at 380 mg/1 to present-day levels of 825 mg/1 at Imperial Dam. Flow depletions, associated with decreased runoff and increased evaporation and diversions, coupled with high salt loading from natural and man-created sources are considered the primary causes for rising salinity in the river. The urban and agricultural development projected to occur in the basin through this century could deplete …
Pastoral Land Degradation: The Fitzroy As A Case Study, Alan L. Payne, Ronald B. Hacker
Pastoral Land Degradation: The Fitzroy As A Case Study, Alan L. Payne, Ronald B. Hacker
Journal of the Department of Agriculture, Western Australia, Series 4
When large numbers of domestic livestock are superimposed on native vegetation in semi-arid and arid areas of the world, the ecological balance inevitably changes. In extreme cases these changes include such degradation as drastic losses of vegetation and active soil erosion. Areas affected in this way are unproductive for most purposes.
Western Australia's Fitzroy River valley has deteriorated in this way. Today, this once-productive grazing country is so degraded that it has become a matter of concern to Governments, the pastoral industry and others.
This article gives a brief history of land degradation in parts of the Fitzroy River valley, …
Land Resource Survey Report Of The Brigadoon Development Proposal, M R. Wells
Land Resource Survey Report Of The Brigadoon Development Proposal, M R. Wells
Resource management technical reports
No abstract provided.
A Brief Study Of Land Capability In The Coastal Region Of The Shire Of Harvey, Department Of Agriculture, Western Australia. Soil Conservation Service, M R. Wells, P A. Hesp
A Brief Study Of Land Capability In The Coastal Region Of The Shire Of Harvey, Department Of Agriculture, Western Australia. Soil Conservation Service, M R. Wells, P A. Hesp
Resource management technical reports
No abstract provided.
Oyster Spatfall In Virginia Rivers: 1982 Annual Summary, Dexter S. Haven, James Whitcomb
Oyster Spatfall In Virginia Rivers: 1982 Annual Summary, Dexter S. Haven, James Whitcomb
Reports
The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made from oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells are counted each week of the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur.
Variation Of Whole Body Components As An Indicator Of Habitat Quality In Geomys Bursarius And Peromyscus Maniculatus, Joseph W. Nietfeldt
Variation Of Whole Body Components As An Indicator Of Habitat Quality In Geomys Bursarius And Peromyscus Maniculatus, Joseph W. Nietfeldt
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Volume 6, Number 12 (December 1982), The Solar Ocean Energy Liaison
Volume 6, Number 12 (December 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Curbur Station : Inventory Of The Range And Its Management, Alexander Mcrae Holm
Curbur Station : Inventory Of The Range And Its Management, Alexander Mcrae Holm
Resource management technical reports
Ten land systems were identified, descriped and mapped. potential feed status was assessed for each land system. The land systems were then ranked accordingly and stocking rates allocated. Wongdong saline shrublands was considered to be the most productive system and Narryer hills, outcrops and breakaways the least productive. An assessment was made of the range condition and erosion status of the least. These assessments indicated that most of the pastures had been heavily utilized in the past.
Quobba Point Chalet Development Land Capability Study [And] Environmental Consideration, J R H Riches, L E. Chalmers
Quobba Point Chalet Development Land Capability Study [And] Environmental Consideration, J R H Riches, L E. Chalmers
Resource management technical reports
The preferred area for development is the Old Stabilised Dune System. The Hind Dune Flat is a stable area but is limited in size. Other environmental and town planning considerations may militate against development of this area for Chalet Development.
Mass And Energy Exchanges Of Soybeans: Microclimate-Plant Architectural Interactions, Dennis D. Baldocchi
Mass And Energy Exchanges Of Soybeans: Microclimate-Plant Architectural Interactions, Dennis D. Baldocchi
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Volume 6, Number 11 (November 1982), The Solar Ocean Energy Liaison
Volume 6, Number 11 (November 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Volume 6, Number 10 (October 1982), The Solar Ocean Energy Liaison
Volume 6, Number 10 (October 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Volume 6, Number 9 (September 1982), The Solar Ocean Energy Liaison
Volume 6, Number 9 (September 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Volume 6, Number 8 (August 1982), The Solar Ocean Energy Liaison
Volume 6, Number 8 (August 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
Volume 6, Number 7 (July 1982), The Solar Ocean Energy Liaison
Volume 6, Number 7 (July 1982), The Solar Ocean Energy Liaison
The OTEC Liaison
No abstract provided.
The Sale, Lease Or Exchange Of Indian Water Rights For Energy Development, Thomas W. Fredericks
The Sale, Lease Or Exchange Of Indian Water Rights For Energy Development, Thomas W. Fredericks
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
34 pages.
Contains references.
Weather Resources Management And Interbasin Transfer Law [Outline], Ray Jay Davis
Weather Resources Management And Interbasin Transfer Law [Outline], Ray Jay Davis
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
21 pages (includes illustrations).
Water Problems & Issues Affecting United States-Mexico Relations: Policy Options & Alternatives, Albert E. Utton
Water Problems & Issues Affecting United States-Mexico Relations: Policy Options & Alternatives, Albert E. Utton
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
42 pages.
Contains 6 pages of endnotes.
New York City’S Battles For Imported Water, J. Kevin Healy
New York City’S Battles For Imported Water, J. Kevin Healy
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
16 pages (includes illustrations and maps).
A Case Study Of The Windy Gap Project [Outline], John M. Sayre
A Case Study Of The Windy Gap Project [Outline], John M. Sayre
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
7 pages.
A Case Study: The Yellowstone River, Donald Mcintyre
A Case Study: The Yellowstone River, Donald Mcintyre
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
106 pages (includes maps).
Contains 15 appendices.
The Central Arizona Project, Jon Kyl
The Central Arizona Project, Jon Kyl
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
38 pages (includes illustrations).
Contains footnotes.
Contains 9 attachments.
The Metropolitan Water District Of Southern California [Outline], Carl Boronkay
The Metropolitan Water District Of Southern California [Outline], Carl Boronkay
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
4 pages.
The California State Water Project, Jerry Meral
The California State Water Project, Jerry Meral
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
27 pages.
El Paso/New Mexico Controversy [Outline], John P. Frank
El Paso/New Mexico Controversy [Outline], John P. Frank
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
3 pages.
A Downstream Perspective On South Dakota’S Purported Sale Of Water To Etsi, Norman W. Thorson
A Downstream Perspective On South Dakota’S Purported Sale Of Water To Etsi, Norman W. Thorson
New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)
29 pages (includes 2 maps).
Contains 13 attachments.