Advanced SearchSearch Tips
Hydraulic Residence Time in a Prototype Free Water Surface Constructed Wetland
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Hydraulic Residence Time in a Prototype Free Water Surface Constructed Wetland
Lee, Kyung-Do; Kwun, Soon-Kuk; Kim, Seong-Bae; Cho, Young-Hyun; Kim, Jin-Ho;
  PDF(new window)
A prototype surface flow constructed wetland was built in the upstream area of reclaimed tidal lands to improve the water quality of Lake Sihwa by treating severely polluted stream water. In this study, a tracer test using rhodamine-WT was performed to investigate the flow characteristics and to quantify the observed hydraulic residence time (HRT) for a high-lying cell in the Banwol wetland of the Sihwa constructed wetland. The tracer test indicated that even if flow was mainly observed in the open water area of the Banwol wetland, water flowed continuously in the vegetative area and there was no dead zone. The calculated HRT (51.3 hrs), calculated by dividing the wetland volume by the wetland inflow, exceeded the observed HRT (38.7 hrs), since the short-circuiting of flux resulting from irregular topography and vegetation was not reflected in the calculated HRT. The exit tracer concentration curves were reproduced well by both the plug flow with dispersion and tanks-in-series models, indicating that the performance of the Banwol wetland can be estimated accurately using these models.
Constructed wetland;hydraulic residence time;tracer test;
 Cited by
Mitsch, W. J. and Cosselink., J. G. (1993) Wetlands, 2nd ed. Van Nostrand Reinhold, New York. pp. 720

USEPA (1999) Constructed wetlands treatment of municipal waste waters, Manual, EPA/625/R-99/010. pp 165

Kadlec, R. H. and Knight, R. L. (1996) Treatment wetlands, Lewis Publishers. pp. 893

Werner, T. M and Kadlec, R. H. (2000) Wetland residence time distribution modeling. Ecological Engineering 15, 77-90 crossref(new window)

Urban, D. T. (1990) Methods of determining residence time distributions in a reconstructed wetland. MS. thesis, Illinois Institute of Technology, Chicago, IL. pp 72

Kadlec, R. H. (1994) Detention and mixing in free water wetlands, Ecological Engineering 3, 345-380 crossref(new window)

Stem, D. A., Khanbivardi, R., Alair, J. C. and Richardson, W. (2001) Description of flow trough a natural wetland using dye treacer test. Ecological Engineering 18, 173-184 crossref(new window)

Lin, A. Y, Debroux, J. F. J., Cunningham, A,. Reinhard. M. (2003) Comparison of rhodamin WT and bromide in the determination of hydraulic characteristics of constructed wetlands. Ecological Engineering 20, 75-88 crossref(new window)

KOWACO (2002) Study on operation and management of Sihwa constructed wetland, Korea Water Resources Corporation, Daejeon pp. 550. (in Korean)

Smart, P. L. and Laidlaw, I. M. S. (1971) An evaluation of some fluorescent dyes for water tracing. Water Resources Research 13(1), 15-33 crossref(new window)

Turner, E. G., Netherland, M. D., and Getsinger, K. D. (1991) Submersed plants and algae as factors in the loss of rhodamine WT dye. J. Aquat. Plant Manage. 29, 113-115

Tai, D. Y. and Rathbun, R E (1988) Photolysis of rhodarnin-WT dye. Chemosphere 17(3), 559-573 crossref(new window)

Levenspiel, O. (1972) Chemical reaction engineering. 2nd ed. Wiley, New York 512-532

Fogler, H. S. (1992) Elements of chemical reaction engineering. 2nd ed. Prentice-Hall, Englewood Cliffs, NJ. 345-352

USEPA (1998) Design manual : constructed wetlands and aquatic plant systems for municipal wastewater treatment. USEPA 625/1-88/022. 1-43