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Low-velocity flows in constructed wetlands

physico-mathematical model and computer codes in Matlab-enviroment

Wörman, Anders and Kjellin, Johan (2006). Low-velocity flows in constructed wetlands. Technical Report. Uppsala: ?? 4072 ??, Sveriges lantbruksuniversitet. Rapport. Miljö, teknik och lantbruk ; 2006:0
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Abstract

Constructed wetlands play an essential role in reducing nutrient content and heavy metals in wastewater and run-off water. The treatment efficiency strongly depends on flow pattern and residence times of the water, and therefore further understanding of water flow in constructed is of great importance. Flow modeling is here an efficient tool, and this report describes a 2D model for water flow in constructed wetlands. The model is implemented in Matlab environment and applies for stationary, "low velocity" flow with free surface and small water depth relative to the horizontal extension of the wetland. Simulations compute the elevation of the free water surface and calculate flow velocities. Furthermore, a particle tracking routine gives information of flow paths and residence times of the wetland, where particles can be subjected to both dispersion and exchange with stagnant zones. The main purpose of the model is to provide fast and useful computations for practice in wetland technology, and especially to adapt the mathematical formulation to the specific flow conditions prevailing in wetlands.

Authors/Creators:Wörman, Anders and Kjellin, Johan
Title:Low-velocity flows in constructed wetlands
Subtitle:physico-mathematical model and computer codes in Matlab-enviroment
Series/Journal:Rapport. Miljö, teknik och lantbruk (1652-3237)
Year of publishing :2006
Number:2006:0
Number of Pages:24
Place of Publication:Uppsala
Publisher:Institutionen för biometri och teknik, Sveriges lantbruksuniversitet
ISSN:1652-3237
Language:English
Publication Type:Report
Refereed:No
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Landscape planning
Obsolete subject words > INTERDISCIPLINARY RESEARCH AREAS > Water in nature and society
Keywords:treatment wetlands, flow model, numerical methods, constructed wetlands, vegetation, wetlands
URN:NBN:urn:nbn:se:slu:epsilon-8-165
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-165
ID Code:3807
Department:?? 4072 ??
Deposited By: Erica Lövgren
Deposited On:10 Jul 2009 00:00
Metadata Last Modified:02 Dec 2014 10:25

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