dc.contributor.author	Fomchenko, Nicole M.S.	en
dc.contributor.committeechair	Persaud, Naraine	en
dc.contributor.committeemember	Focazio, Michael	en
dc.contributor.committeemember	Aust, W. Michael	en
dc.contributor.committeemember	Daniels, W. Lee	en
dc.contributor.department	Crop and Soil Environmental Sciences	en
dc.date.accessioned	2014-03-14T21:52:55Z	en
dc.date.adate	1998-05-13	en
dc.date.available	2014-03-14T21:52:55Z	en
dc.date.issued	1998-04-23	en
dc.date.rdate	1999-05-13	en
dc.date.sdate	1998-04-23	en
dc.description.abstract	The design of wetlands to replace those lost to development requires quantitative understanding of the wetland water budget in order to estimate the amount of water available to the wetland over time. Many methods exist to estimate each component of the wetland water budget. In this study, monthly values of the water budget components namely, precipitation, runoff, evapotranspiration, and groundwater seepage were calculated using a water budget model and compared to on-site field measurements for a wetland in Manassas, Prince William County, VA. The monthly precipitation estimated from a weather station 32.18 km from the site differed from the on-site values by as much as 2.9 times. Runoff estimates calculated by the Soil Conservation Service (SCS) method using antecedent moisture condition (AMC) II underpredicted runoff for every month by as high as 100 percent compared to the on-site measured runoff. The choice of AMC greatly affected the SCS runoff estimates. Runoff was the dominant water budget component at the Manassas wetland. The evapotranspiration (ET) estimates using the Thornthwaite method either over or underestimated ET when compared to ET calculated from diurnal cycles of the water table in the wetland. Groundwater seepage losses were calculated using Darcy's equation with an assumed hydraulic gradient of one, and with gradients measured with nested piezometers. Seepage losses at the Manassas wetland were negligible. Overall, the water budget model provided conservative estimates of the available water in the wetland during the 10-month period of observation.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-41398-11346	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-41398-11346/	en
dc.identifier.uri	http://hdl.handle.net/10919/46487	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	1text.pdf	en
dc.relation.haspart	2-fig1.pdf	en
dc.relation.haspart	3-fig2.pdf	en
dc.relation.haspart	4text.pdf	en
dc.relation.haspart	5-fig3.pdf	en
dc.relation.haspart	6-fig4.pdf	en
dc.relation.haspart	7-fig5.pdf	en
dc.relation.haspart	8-fig6.pdf	en
dc.relation.haspart	9-fig7.pdf	en
dc.relation.haspart	10-fig8.pdf	en
dc.relation.haspart	11-fig9.pdf	en
dc.relation.haspart	12-fig10.pdf	en
dc.relation.haspart	13-fig11.pdf	en
dc.relation.haspart	14-fig12.pdf	en
dc.relation.haspart	15-fig13.pdf	en
dc.relation.haspart	16-fig14.pdf	en
dc.relation.haspart	17-fig15.pdf	en
dc.relation.haspart	18-fig16.pdf	en
dc.relation.haspart	19-fig17.pdf	en
dc.relation.haspart	20-fig18.pdf	en
dc.relation.haspart	21-tables.pdf	en
dc.relation.haspart	22text.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	wetland hydrology	en
dc.subject	water budget	en
dc.subject	water balance	en
dc.subject	precipitation	en
dc.subject	evapotranspiration	en
dc.subject	runoff	en
dc.subject	stream flow	en
dc.subject	groundwater	en
dc.subject	water storage	en
dc.title	Estimating the Components of a Wetland Water Budget	en
dc.type	Thesis	en
thesis.degree.discipline	Crop and Soil Environmental Sciences	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Estimating the Components of a Wetland Water Budget

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