Sichtbarkeit ändern Search & Display Options

Alles auswählen    Auswahl aufheben
 |   | 
  Eintrag Verweise
Autor Koptsik, S.; Strand, L.; Clarke, N. url  openurl
  Titel (up) On the calculation of the surface area of different soil size fractions Typ Journal Article
  Jahr 2003 Publikation Applied Geochemistry Kurztitel der Zeitschrift  
  Band 18 Ausgabe 5 Seiten 629-651  
  Zusammenfassung A model that accounts for contributions to the total surface area (SA) by different size fractions of the soil is considered from a theoretical point of view. Calculations, based on continuous particle sizes and forms, explain SA mainly as a geometric SA. It is common for coarse soils to have a discrepancy between the measured SA, say inferred from adsorption of gases, and the calculated geometric area of up to two orders of magnitude. This discrepancy is removed by the present method. Size distribution is the main factor influencing the SA; taking particle forms into account resulted in a 2-3 times increase of SA. The several orders of magnitude range of grain sizes leads to crucial variations in the contributions that soil fractions make to weight, SA and number of grains. The fundamental lower limit of variation of soil properties, originating from the discrete nature of soils, is introduced. Despite the deterministic physical origin of SA, high sensitivity to the finest fractions can be considered on the environmental scale as a cause of the dual-stochastic and deterministic-nature of SA. Small variations of weight within experimental error and the fundamental limit may result in significant variations of SA, close to the same order of magnitude for coarse soils. An empirical equation (Sverdrup, 1990) relates textural data to SA at landscape scale. It is applicable to a collection of samples, while individual samples must be characterised on a probabilistic basis. (C) 2002 Elsevier Science Ltd. All rights reserved  
  Organisation Abschlussarbeit  
  Herausgeber Erscheinungsort Editor  
  Sprache Sprache der Zusammenfassung Originaltitel  
  Editor der Reihe Titel der Reihe Kurztitel der Reihe  
  Band der Reihe Ausgabe der Reihe Edition  
  ISSN 0883-2927 ISBN Medium  
  Bereich Expedition Konferenz  
  Notizen J 3 Geprüft nein  
  Rufnummer LWF @ daniel.morovitz @ 9 Signatur 402  
Permalink für diesen Eintrag
Alles auswählen    Auswahl aufheben
 |   | 

Save Citations:
Export Records: