Evaluation of the hydraulic characteristics and flow pattern in a constructed wetland by means of tracer studies. Part 1

T. Machate, H. Behrens, D. Klotz, H. Noll, K. W. Schramm, A. Kettrup

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5 Scopus citations

Abstract

Hydraulic parameters were studied in a free water-surface vertical flow constructed wetland plant. The coefficients of hydraulic permeability of a typha-planted and a scirpus-planted unit were determined at different loading rates. Fluorescent dyes (uranine, pyranine and eosin) were examined for their capability to determine the mean residence time in comparison to bromide. Bromide, eosin and pyranine yielded a slight retention of approx. 10% and 15 % compared to the theoretical residence time, whereas uranine was accelerated, as our results suggest.

Original languageEnglish
Pages (from-to)635-641
Number of pages7
JournalFresenius Environmental Bulletin
Volume7
Issue number11-12
StatePublished - 1998
Externally publishedYes

Keywords

  • Constructed wetlands
  • Fluorescent dyes
  • Hydraulic conductivity
  • Residence time

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