Surface water flow resistance due to emergent wetland vegetation

dc.contributor.authorHall, Karenen
dc.contributor.committeechairThompson, Theresa M.en
dc.contributor.committeememberEaston, Zachary M.en
dc.contributor.committeememberDiplas, Panayiotisen
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessioned2014-03-14T21:34:33Zen
dc.date.adate2012-05-24en
dc.date.available2014-03-14T21:34:33Zen
dc.date.issued2012-04-11en
dc.date.rdate2012-05-24en
dc.date.sdate2012-04-25en
dc.description.abstractThe key to a successful wetland design is duplicating the hydroperiod of the desired wetland type. Dense wetland vegetation affects surface water flow rates by increasing flow resistance. Prior research represented the vegetation as individual stems; however, many wetland species grow in clumps. Therefore, the objectives of this study were to investigate the effect of clumping vegetation on flow resistance and to develop a prediction equation for use in wetland design. A 6-m by 1-m by 0.4-m recirculating flume was planted with mature common rush, Juncus effusus, a common emergent wetland plant. Three different flow rates (3, 4, and 5 L/s) and three different tailgate heights (0, 2.5, and 5 cm) were used to simulate a variety of wetland conditions. Plant spacing and clump diameter were varied (20 and 25 cm, 8 and 12 cm, respectively). Friction factors ranged from 9 to 40 and decreased with increasing plant density. Non-dimensional parameters determined through Buckingham Pi analysis were used in a regression analysis to develop a prediction model. Results of the regression analysis showed that the fraction of vegetated occupied area (P) was most significant factor in determining friction factor.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-04252012-092756en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04252012-092756/en
dc.identifier.urihttp://hdl.handle.net/10919/42242en
dc.publisherVirginia Techen
dc.relation.haspartHall_KL_T_2012.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectwetlanden
dc.subjectfriction factoren
dc.subjectresistanceen
dc.subjectflowen
dc.subjectvegetationen
dc.titleSurface water flow resistance due to emergent wetland vegetationen
dc.typeThesisen
thesis.degree.disciplineBiological Systems Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Hall_KL_T_2012.pdf
Size:
3.39 MB
Format:
Adobe Portable Document Format

Collections