Vers une évaluation de la valeur économique totale de la nappe phréatique d'Alsace
2000
Le but de ce travail a consiste a poser les bases d'une estimation de la valeur economique totale de la nappe phreatique d'Alsace. Cet article s'articule autour de trois points : (i) la typologie des services d'usage et de non-usage de la nappe (ii) la quantification des prelevements a travers la constitution d'une base de donnees (iii) la mise en parallele des benefices et des methodes d'evaluation monetaire. Le recensement exhaustif des prelevements effectues dans la nappe etablit un volume preleve annuellement compris entre 624 et 717 millions de m3, tous usages confondus. Le second resultat marquant est le poids de l'activite industrielle (plus de 70 % des prelevements). Finalement ces resultats ne constituent que la premiere etape d'un travail plus ambitieux portant sur l'estimation de la valeur patrimoniale de la nappe d'Alsace. / The objective of this article was to raise the basis of the total value estimation for the Alsatian aquifer. This work is constructed around three principal points: (i) the use and non use values identification; (ii) an exhaustive quantifying of all the effective charges through a data base building; (iii) a parallel of the use and non use benefits with the monetary valuation methods. An exhaustive account of all the effective charges in the aquifer has established a charged volume between 624 et 717 millions of m3 per year. The second result is based on the industrial activity weight in the total charged volume of the aquifer (more than 70%). These results represent only the first step of a more ambitious work: the total value estimation for the aquifer, knowing that the choice of all the relevant monetary indicators have to discussed before.
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