dc.contributor.author	Lockard, Brendan Corbett	en
dc.contributor.committeecochair	Lohani, Vinod K.	en
dc.contributor.committeecochair	Kibler, David F.	en
dc.contributor.committeemember	Newcomb, Tammy J.	en
dc.contributor.department	Civil Engineering	en
dc.date.accessioned	2014-03-14T20:41:27Z	en
dc.date.adate	2002-07-23	en
dc.date.available	2014-03-14T20:41:27Z	en
dc.date.issued	2002-07-08	en
dc.date.rdate	2003-07-23	en
dc.date.sdate	2002-07-15	en
dc.description.abstract	In this study eight residential development scenarios are created for the mostly undeveloped Back Creek Watershed outside Roanoke, Virginia. The development scenarios include low, medium (cluster), medium (conventional), and high density development with and without development restrictions. These scenarios represent a large range of development as the land use imperviousness varies from 1% for the baseline condition to 34% for the most developed scenario. The hydrologic model HSPF is used to generate overland and channel flows from 43 years of rainfall. Hydrologic output from HSPF of the various landuse patterns from the eight scenarios are evaluated using Post Processor, a Visual Basic program. The results show that increased development causes a reduction in Back Creek's baseflow and an increase in the occurrence of both high and low flow extreme events. Overall, these results indicate that increased development will increase the variability of flowrate in Back Creek. Stream health impacts from flow variability were also analyzed with the Post Processor. First, hydrologic statistical variables with ecological relationships were used to gage the level of stream health impacts from flow variability. The averaged stream health index for the development scenarios was found to closely follow the amount of development, represented by the percent of impervious landuse. Second, the amount of velocity, depth, and both depth and velocity habitat available for three habitat guild representative species was evaluated for each scenario. The results indicated that increased development would lead to a substantial reduction in available riffle species habitat (represented by the fantail darter) and a moderate reduction in run and pool species habitat (represented by the central stoneroller and smallmouth bass, respectively). Overall, increased development has been found to have a negative impact on stream health. This impact should be considered in any future expansion of the Roanoke suburbs into this watershed.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-07152002-121317	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-07152002-121317/	en
dc.identifier.uri	http://hdl.handle.net/10919/34013	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	Chapter5.pdf	en
dc.relation.haspart	Chapter4.pdf	en
dc.relation.haspart	AppendixH.pdf	en
dc.relation.haspart	Chapter3.pdf	en
dc.relation.haspart	AppendixE.pdf	en
dc.relation.haspart	AppendixD.pdf	en
dc.relation.haspart	AppendixC.pdf	en
dc.relation.haspart	AppendixB.pdf	en
dc.relation.haspart	Chapter2.pdf	en
dc.relation.haspart	Chapter1.pdf	en
dc.relation.haspart	AppendixG.pdf	en
dc.relation.haspart	AppendixF.pdf	en
dc.relation.haspart	AppendixA.pdf	en
dc.relation.haspart	endmatter.pdf	en
dc.relation.haspart	etd.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	stream health	en
dc.subject	residential landuse	en
dc.subject	flow variability	en
dc.subject	hydrology	en
dc.subject	HSPF	en
dc.title	Long Term Hydrologic Effects on Stream Health from Residential Development Patterns	en
dc.type	Thesis	en
thesis.degree.discipline	Civil Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Long Term Hydrologic Effects on Stream Health from Residential Development Patterns

Files

Original bundle

Collections