Constructed wetland system for storm water treatment

An eleven year old constructed wetland system for storm water treatment at Stammersdorf near Vienna has to be redesigned. The small sand trap and the usage of loamy material as substrate for the main layer of the reed bed led to a rapid clogging of the system and to a very limited elimination rate....

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2000-09, Vol.35 (8), p.1279-1288
Main Author: Laber, Johannes
Format: Article
Language:English
Subjects:
Austria, Stammersdorf
Constructed wetland
hydraulic design
retention pond
storm water
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Summary:An eleven year old constructed wetland system for storm water treatment at Stammersdorf near Vienna has to be redesigned. The small sand trap and the usage of loamy material as substrate for the main layer of the reed bed led to a rapid clogging of the system and to a very limited elimination rate. To obtain data for parameters (catchment hydrology, loading rates) for the new design, online measurements at the inlet of the system of water flow and some physical parameters were undertaken as well as sampling and analysis of the inlet water (TSS, TOC, NH 4 -N). The new design includes two parallel ditches (each 1380 m 3 ) which are a combination of settling and retention ponds. The regulated outlet of the ditches is now treated in the main treatment zone which is a horizontal subsurface flow constructed wetland (1500 m 2 ) with coarse sand (1/4 mm) as main layer. The final structure is a polishing pond (800 m 2 ) after which the effluent is recharged into the groundwater.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934520009377036