Water SpectrumU.S. Army Corps of Engineers, 1979 |
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Página 10
... population E. Ecological impacts F. Value of keeping future options open ( option value ) G. Existence values H. Restraints on activities conflicting with fisheries ( e.g. pollution ) I. Others state licenses ) , so there is no market ...
... population E. Ecological impacts F. Value of keeping future options open ( option value ) G. Existence values H. Restraints on activities conflicting with fisheries ( e.g. pollution ) I. Others state licenses ) , so there is no market ...
Página 11
... population , each season of the year is different , each species has a different value to anglers and to consumers , the harvest of one species can affect other species , recreation quality depends upon many factors , the costs of ...
... population , each season of the year is different , each species has a different value to anglers and to consumers , the harvest of one species can affect other species , recreation quality depends upon many factors , the costs of ...
Página 12
... population dynamics of whitefish , then adds information about fishing costs and value . Results showed that fishing effort is excessive in some areas , and that gear limitations seem to be imposing some " unnecessary " costs on ...
... population dynamics of whitefish , then adds information about fishing costs and value . Results showed that fishing effort is excessive in some areas , and that gear limitations seem to be imposing some " unnecessary " costs on ...
Página 15
... populations is their ability ( apparently ) to control the alewife population of Lake Michigan , thus preventing massive die - offs that foul the beaches . There are numerous other examples of beneficial and detrimental effects that ...
... populations is their ability ( apparently ) to control the alewife population of Lake Michigan , thus preventing massive die - offs that foul the beaches . There are numerous other examples of beneficial and detrimental effects that ...
Página 18
... populations ; inundated trees , stumps and other structures provide safe havens and subsequent good survival of young fish ; flooding of rich bottom land contributes to water fertility , which leads to increased abun- dance of fish food ...
... populations ; inundated trees , stumps and other structures provide safe havens and subsequent good survival of young fish ; flooding of rich bottom land contributes to water fertility , which leads to increased abun- dance of fish food ...
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Términos y frases comunes
agencies aquatic areas barge basin beach beach nourishment brown trout canal channel Chief of Engineers clam coal coastal commercial construction Corps of Engineers cost Creek designed discharge District economic economic rent effects energy environment environmental estuaries evaluation facilities Federal fish and wildlife fishery flash flood floodplain future Geological geothermal ground water habitat harbor Hawaiian monk seal hydrilla impact improvements increase industry instream flows Island Lake Erie Lake Ontario land levels located locks major manatee maps ment miles million National navigation needed nodules ocean Ohio Ohio River operation OTEC percent Photo planning plant population potential problems production rafting recreation region reservoir result River sediment soil species stream structure surface temperature tion transportation trout U.S. Army U.S. Army Corps U.S. Geological Survey United values water policy water resources Water Spectrum waterways weather modification wetlands
Pasajes populares
Página 1 - It is hereby declared to be the policy of the United States that certain selected rivers of the Nation which, with their immediate environments, possess outstandingly remarkable scenic, recreational, geologic, fish and wildlife, historic, cultural, or other similar values...
Página 28 - From you have I been absent in the spring, When proud-pied April dress'd in all his trim Hath put a spirit of youth in every thing, That heavy Saturn laugh'd and leap'd with him. Yet nor the lays of birds nor the sweet smell Of different flowers in odour and in hue Could make me any summer's story tell, Or from their proud lap pluck them where they grew ; Nor did...
Página 29 - Add $ .75 for foreign mailing. No additional postage is required for mailing within the United States, its possessions, Canada, Mexico, and all Central and South American Countries except Argentina, Brazil, British Honduras, French Guiana, Guyana, and Surinam. For shipment to all other foreign countries include additional postage as quoted for each periodical or subscription service.
Página 30 - ... assure the protection and propagation of a balanced, indigenous population of shellfish, fish and wildlife in and on the body of water into which the discharge is to be made.
Página 12 - Remittance Enclosed (Make checks payable to Superintendent of Documents) D Charge to my Deposit Account No. MAIL ORDER FORM TO: Superintendent of Documents Government Printing Office Washington, DC 20402...
Página 2 - The purpose of this Act is to implement this policy by instituting a national wild and scenic rivers system, by designating the initial components of that system and by prescribing the methods by which and standards according to which additional components may be added to the system from time to time.
Página 2 - GEOMORPHOLOGY - That branch of both physiography and geology which deals with the form of the earth, the general configuration of its surface, and the changes that take place in the evolution of land forms.
Página 46 - Plans are policies and policies, in a democracy at any rate, spell politics. The question is not whether planning will reflect politics but whose politics will it reflect. What values and whose values will planners seek to implement?
Página 1 - Agriculture shall make specific studies and investigations to determine which additional wild, scenic and recreational river areas within the United States shall be evaluated in planning reports by all Federal agencies as potential alternative uses of the water and related land resources involved.
Página 3 - Managing our vital water resources depends on a balance of supply, demand and wise use. Using water more efficiently is often cheaper and less damaging to the environment than developing additional supplies. While increases in supply will still be necessary, these reforms place emphasis on water conservation and make clear that this is now a national priority.