Mise en oeuvre d'un système de comparaison des réponses des indices biologiques sur les cours d'eau de la plaine d'Alsace PDF Download
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Author: Jean-Luc Ehrhard
Publisher:
ISBN:
Category :
Languages : fr
Pages : 186
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Author: Jean-Luc Ehrhard
Publisher:
ISBN:
Category :
Languages : fr
Pages : 186
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Author: Gilbert F. White
Publisher:
ISBN:
Category : Social Science
Languages : en
Pages : 262
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Author: tucson Symposium on the use of analog and digital computers in hydrology
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Category :
Languages : en
Pages :
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Category : Factory and trade waste
Languages : en
Pages : 0
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Author: Unesco
Publisher:
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Category : Arid regions
Languages : en
Pages : 144
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Author: William A. Thomas
Publisher: Springer Science & Business Media
ISBN: 1468416987
Category : Technology & Engineering
Languages : en
Pages : 253
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Researchers and agencies collect reams of objective data and authors publish volumes of subjective prose in attempts to explain what is meant by environmental quality. Still, we have no universally recognized methods for combining our quantitative measures with our qualitative concepts of environ ment. Not all of our environmental goals should be reduced to mere numbers, but many of them can be; and without these quantitative terms, we have no way of defining our present position nor of selecting positions we wish to attain on any logically established scale of environmen tal values. Stated simply, in our zeal to measure our environment we often forget that masses of numbers describing a system are insufficient to understand it or to be used in selecting goals and priorities for expending our economic and human resources. Attempts at quantitatively describing environmental quality, rather than merely measuring different environmental variables, are relatively recent. This condensing of data into the optimum number of terms with maximum information content is a truly interdisciplinary challenge. When Oak Ridge National Laboratory initiated its Environmental Program in early 1970 under a grant from the National Science Foundation, the usefulness of environmental indicators in assessing the effects of technology was included as one of the initial areas for investigation. James L. Liverman, through his encouragement and firm belief that these indicators are indispensable if we are to resolve our complex environmental problems, deserves much of the credit for the publication of this book.
Author: Unesco
Publisher:
ISBN:
Category : Arid regions
Languages : en
Pages : 198
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Author: Unesco
Publisher: paris
ISBN:
Category : Science
Languages : en
Pages : 510
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Author: Unesco
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 356
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Non Aboriginal material.
Author: George Peter Murdock
Publisher:
ISBN:
Category : Anthropology
Languages : en
Pages : 164
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