A computer simulation model for investigating the effect of land application of sludge on runoff water quality

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dc.contributor.authorDeizman, Marcia McCutchanen
dc.contributor.committeechairMostaghimi, Saieden
dc.contributor.committeememberDillaha, Theo A. IIIen
dc.contributor.committeememberReneau, Raymond B. Jr.en
dc.contributor.committeememberPerumpral, John V.en
dc.contributor.departmentAgricultural Engineeringen
dc.date.accessioned2014-03-14T21:45:07Zen
dc.date.adate2012-09-08en
dc.date.available2014-03-14T21:45:07Zen
dc.date.issued1989-04-22en
dc.date.rdate2012-09-08en
dc.date.sdate2012-09-08en
dc.description.abstractCREAMS-NT, a modified version of the field-scale model for Chemicals, Runoff, and Erosion from Agricultural Management Systems (CREAMS) model, was developed to simulate the nitrogen (N) transformations and subsequent nutrient transport processes which occur in the soil following organic waste applications. CREAMS-NT accounts for nutrient addition through fertilization and rainfall and losses of N by volatilization, denitrification, plant uptake, leaching, and overland flow. Data required by CREAMS-NT includes runoff volume, sediment yield, percolation, and soil environmental conditions which is generated by the hydrologic and erosion components of the original CREAMS model. The mineralization, nitrification, denitrification, ar1d volatilization processes are simulated using firstâ order knetic equations adjusted for the effects of soil environmental conditions including temperature, moisture, pH, soil/sludge contact, and soil cation exchange capacity. Prior to a runoff event, soil ammnonium-N (NH4 â N) is partitioned between adsorbed and desorbed phases. CREAMS-NT predicts the transport of organic-N, NH4 â N, and sediment=bound phosphorus (P3b) in runoff using enrichment ratios. The transport of soluble nutrients, nitrate-N (NO3 â N), NH4 â N, and soluble P (PTF), is estimated using extraction coefficients.en
dc.description.degreeMaster of Scienceen
dc.format.extentxii, 258 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-09082012-040042en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09082012-040042/en
dc.identifier.urihttp://hdl.handle.net/10919/44629en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1989.D449.pdfen
dc.relation.isformatofOCLC# 19963022en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1989.D449en
dc.subject.lcshRunoffen
dc.subject.lcshSewage sludge as fertilizeren
dc.subject.lcshSoils -- Fertilizer movementen
dc.titleA computer simulation model for investigating the effect of land application of sludge on runoff water qualityen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAgricultural Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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