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Dissertations / Theses on the topic 'Zone of aeration Water'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Enright, Bryn Alison. "Adsorption of VOC vapors at the air-water interface in unsaturated media." Thesis, The University of Arizona, 1998. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0092_sip1_w.pdf&type=application/pdf.

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2

Li, Liqing. "Water saturation and air/water interfacial area measurements by partitioning gas tracers in the vadose zone and landfills." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 176 p, 2008. http://proquest.umi.com/pqdweb?did=1464133931&sid=30&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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3

Rucker, Dale Franklin. "Improved analysis of borehole ground penetrating radar to monitor transient water flow in the vadose zone." Diss., The University of Arizona, 2003. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2003_320_sip1_w.pdf&type=application/pdf.

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4

Thomson, Kirk Alan, and Kirk Alan Thomson. "VERTICAL DIFFUSION OF SELECTED VOLATILE ORGANIC CONTAMINANTS THROUGH UNSATURATED SOIL FROM A WATER TABLE AQUIFER; FIELD AND LABORATORY STUDIES." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275331.

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5

Hardin, Ernest Lauriston 1956. "Uranium-234 in vadose zone and perched waters of the Apache Leap Tuff, Central Arizona." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/191210.

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Natural enrichment of ²³⁴U with respect to ²³⁸U was investigated in perched water, vadose zone pore waters, and secondary minerals. The activity ratio (AR) for dissolved ²³⁴U increased from about 1.4 in runoff to >6 in perched water. The AR in the vadose zone increased sharply at a transition that correlated with increased magnetic susceptibility and decreasing hydraulic conductivity. This was evidently caused by auto—oxidative selective leaching controlled by matrix saturation. The direct recoil fractionation mechanism has been proposed for tuffs on the Nevada Test Site, and could imply enhan

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6

Wood, Luther G. "Modeling effects of U-tube aeration in recirculating aquaculture systems." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10312009-020150/.

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7

Mahmood-Ul-Hassan, Muhammad. "Water movement through the unsaturated zone." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244907.

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8

CONTRERAS, MORENO Jorge, and KIBRET DAWIT GHEBREIGZIABHER. "Aeration and risk mitigation for flood discharge tunnel in Zipingpu water conservancy project." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275668.

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The importance of hydraulic structures has become an essential mitigating mean for floodsthat occur more often due to climate change. Thus, the importance and safety of flooddischarge tunnels has promoted further studies and experiments on the topic to mitigatedamages, such as cavitation that arise because of high speed flows.After an experimental study on a physical model was carried out on the flood discharge tunnelin Zipingpu Water Conservancy project, a CFD model was designed and simulated in thecommercial software ANSYS Fluent. The simulations aimed to evaluate and examine the riskfor cav

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9

Verrecht, Bart. "Optimisation of a hollow fibre membrane bioreactor for water reuse." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/6779.

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Over the last two decades, implementation of membrane bioreactors (MBRs) has increased due to their superior effluent quality and low plant footprint. However, they are still viewed as a high-cost option, both with regards to capital and operating expenditure (capex and opex). The present thesis extends the understanding of the impact of design and operational parameters of membrane bioreactors on energy demand, and ultimately whole life cost. A simple heuristic aeration model based on a general algorithm for flux vs. aeration shows the benefits of adjusting the membrane aeration intensity to

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10

Dennison, Fiona Joan. "Application of Life Cycle Assessment in the water industry as a tool to support strategic decision-making." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325722.

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11

Wang, Zhiyu. "Integrating an Intermittent Aerator for a Swine Wastewater Treatment System." Thesis, Water Resources Research Center, University of Hawaii at Manoa, 1997. http://hdl.handle.net/10125/21934.

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Integrating an intermittent aeration for the treatment of combined dilute and anaerobic digested swine wastewater in a field swine wastewater treatment system was investigated. Four operations models in term of ratio of aeration to no-aeration of 60:36, 5:1, 4:2 and 3:3 hour were evaluated. At the HRT of 3.2 days and ration of aeration to non-aeration of 3:3, the removal efficiency of BOD5, Total-N, TSS and Total-P of 98.0%, 92.4%, 95.6% and 59.4% could be achieved, respectively. The effluent quality of BOD5, NO3ˉ–N, NH4+–N and TSS concentrations were 35±12mg/l, 2.6±0.8 mg/l, 36±28 mg/l and 78

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12

Holm, Rochelle Hales. "Comparison of three drilling technologies to characterize the vadose zone, Hanford Site." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Summer2007/r_holm_062107.pdf.

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13

Fändriks, Ingrid. "Alternative Methods for Evaluation of Oxygen Transfer Performance in Clean Water." Thesis, Institutionen för informationsteknologi, Department of Information Technology, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-153208.

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Aeration of wastewater is performed in many wastewater treatment plants to supply oxygen to microorganisms. To evaluate the performance of a single aerator or an aeration system, there is a standard method for oxygen transfer measurements in clean water used today. The method includes a model that describes the aeration process and the model parameters could be estimated using nonlinear regression. The model is a simplified description of the oxygen transfer which could possibly result in performance results that are not accurate. That is why many have tried to describe the aeration at other w

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14

Fronk, Robert Charles. "Feasibility study of an aeration treatment system in a raw water storage reservoir used as a potable water source." Master's thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-02162010-020301/.

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15

Hasan, Belkiz, and Paulo Monsalve. "Study on free-surface aeration with high-velocity air-water flows in open-channels." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216145.

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16

Kjellgren, Ylva. "Treatment of per- and polyfluoroalkylsubstance (PFAS)-contaminated waterusing aeration foam collection." Thesis, Institutionen för vatten och miljö, Sveriges Lantbruksuniversitet (SLU). Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423738.

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Landfills are potential sources for PFASs and treatment techniques for landfill leachate are urgently needed. Foam fractionation is an aeration technique which utilizes the tendency of PFASs to escape the liquid phase and build foam. The foam is harvested and with it the contamination. Landfill leachate from Hovgården, Uppsala Sweden contained PFASs of higher concentration than desired and investigations into whether foam fractionation could reduce PFASs amounts were initiated. Landfill leachate containing sum PFASs of 5500 ng/L on average were aerated in two different aeration foam collection

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17

McDonnell, Bryant E. "Controlling disinfection by-products within a distribution system by implementing bubble aeration within storage tanks." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342728645.

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18

Robinson, Joseph K. "The role of bound water content in defining sludge dewatering characteristics." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/50083.

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Several available methods of measuring sludge bound water content in the laboratory were examined. The effect of polymer conditioning on the bound water content of biological sludge samples was measured using the dilatometric method. The effects of mechanical dewatering on the bound water content of biological sludge samples and on chemical sludge samples was measured using the same method. The controlled drying method was used to measure the effect of polymer conditioning and mechanical dewatering on the chemically bound water fraction. The relationship between bound water content and cake

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19

Forrer, Irène Elisabeth. "Solute transport in an unsaturated field soil visualization and quantification of flow patterns using image analysis /." Zurich : Swiss Federal Institute of Technology Zurich, 1997. http://bibpurl.oclc.org/web/31190.

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20

Kool, Jan Bart Jacobus. "Parameter estimation for unsaturated flow models." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80247.

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The estimation of parameters in models for soil unsaturated hydraulic properties from transient flow experiments via inversion of the governing initial-boundary value problem is examined. Emphasis is on the estimation of parameters from in-situ experiments where available data are in the form of spatially and temporally distributed water content and pressure head measurements. The inverse problem is formulated as a weighted least-squares problem. A simple but efficient Levenberg-Marquardt algorithm is developed for its solution. Sensitivity analysis is used to determine optimal sampling strate

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21

Warburton, Charles Arthur. "The effect of sludge age and aerobic sludge mass fraction on low F/M filament bulking in intermittent aeration nitrogen removal systems." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/22119.

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Since 1989 a wide ranging program of research has been under way to identify the factors that effect low F/M filament proliferation. Completed work has established an important factor conducive to low F /M filament proliferation - the presence of anoxic and aerobic zones, or, alternating anoxic-aerobic conditions in a system. It was also established that the presence or absence of readily biodegradable COD (RBCOD) or slowly biodegradable COD (SBCOD) were not deciding factors in their proliferation. The research presented in this thesis focuses on the effects of; • sludge age, • magnitude of th

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22

Bayoumi, Mohamed Nabil. "Guidelines for design of an integrated instream water reclamation system supported by a high-performance aeration weir." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242718.

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23

Dally, William R. "Wave transformation in the surf zone." Gainesville, FL, 1987. http://www.archive.org/details/wavetransformati00dall.

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24

Amter, Steven 1956. "Injection/recovery lysimeter technique for unsaturated zone soil-water extraction." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/191933.

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Current methods of vacuum lysimetry only allow water samples to be collected from the unsaturated zone in relatively wet soils. This thesis presents the results of computer simulation and field testing of a promising new technique that allows water samples to be collected regardless of antecedent moisture content. Injection of a chemically neutral fluid will increase the moisture content of a relatively dry soil, allowing the collection of a sample that contains soil water diluted in the injection fluid. This can be analyzed to yield qualitative chemical data. Although injection was found to a

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25

Gao, Yongxuan 1976. "Community-based water supply : tubewell program in Lumbini Zone, Nepal." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84795.

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26

Shah, Nirjhar. "Vadose zone processes affecting water table fluctuations : conceptualization and modeling considerations." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002260.

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27

Keim, Dawn. "Quantifying water and nitrate fluxes in the Yorkshire Chalk unsaturated zone." Thesis, University of Leeds, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598030.

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This thesis presents a study into the flow processes in the Chalk unsaturated zone at a research site in east Yorkshire. The unsaturated zone plays an important role in reducing groundwater flooding by temporally spreading the impact of storm recharge events and provides a buffer in which surface contaminants may be delayed and attenuated before reaching the water table. Due to the complex dual porosity nature of the Chalk, flow and solutes can be rapidly moved through the unsaturated zone via preferential fracture pathways or more slowly through the porous matrix. Rising nitrate concentration

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28

Radolinski, Jesse Benjamin. "Illuminating controls on solute and water transport in the critical zone." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/95235.

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Earth's near-surface environment sustains nearly all terrestrial life, yet this critical zone is threatened by the environmental migration of new and potentially harmful compounds produced to support a growing human population. Traditional transport equations often fail to capture the environmental behavior of these emerging contaminants due to issues such as flow heterogeneity. Thus, there is a need to better evaluate controls on pollutant partitioning in Earth's critical zone. Our first study investigated the transport and distribution of the neonicotinoid insecticide thiamethoxam (TMX) by g

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29

Parris, Theresa Anduze. "A Microwave Link Over Water In A Tropical Zone Case Study." NSUWorks, 1999. http://nsuworks.nova.edu/gscis_etd/763.

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30

Bushnell, Tanner Hans. "Parameter Importance of an Analytical Model for Transport in the Vadose Zone." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1728.pdf.

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31

Moss, P. Duncan. "Porewater-rock interaction in the unsaturated zone of sandstone aquifers." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330002.

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32

Green, Hannah Mary. "Predictive uncertainty of the Aggregated Dead Zone model for longitudinal dispersion." Thesis, Lancaster University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266811.

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33

Mafra, Karina Cristina. "Medidas da concentração de Radônio-222 em água de poço e solo da região do Pinheirinho em Curitiba e proposta de mitigação da água." Universidade Tecnológica Federal do Paraná, 2011. http://repositorio.utfpr.edu.br/jspui/handle/1/362.

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Mais de 50% da dose de radiação efetiva anual recebida por um ser humano está relacionada com o Radônio e seus produtos. Os principasis mecanismos que levam o Radônio no interior das residências são a emanação do solo e a liberação do Radônio na água. Esse trabalho apresenta uma proposta de mitigação, método para redução de Radônio-222 em níveis de água de poço, utilizando o processo de aeração da água e medidas da concentração de Radônio -222 nas águas e solo. As amostras foram coletadas em poço e solo na região do Pinheirinho em Curitiba, Brasil. As medidas foram realizadas durante o período

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34

Meziane, Aïcha. "Circulation et aeration engendrees par des mobiles d'agitation immerges a axe horizontal dans un chenal d'oxydation." Toulouse, INSA, 1988. http://www.theses.fr/1988ISAT0026.

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35

Rambow, Jürgen. "Modellstudie zum Verbleib herbizider Wirkstoffe in wasserteilgesättigten Böden /." Kiel : Institut für Wasserwirtschaft und Landschaftsökologie der Christian-Albrechts-Universität Kiel, 1992. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=003493279&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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36

Stewart, Marc S. "Shallow water ambient noise caused by breaking waves in the surf zone." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA293240.

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Thesis (M.S. in Applied Physics) Naval Postgraduate School, December 1994.<br>"December 1994." Thesis advisor(s): James H. Wilson, Robert H. Bourke, O.B. Wilson. Bibliography: p. 77-80. Also available online.

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37

Monjardin, Laura Celina Ruelas. "A collaborative approach to water allocation in a coastal zone of Mexico." Thesis, University of Liverpool, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400410.

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38

Teixeira, Gilmar Valente. "Avaliação das perdas qualitativas no armazenamento da soja." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257150.

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Orientador: Benedito Carlos Benedetti<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola<br>Made available in DSpace on 2018-08-06T18:41:51Z (GMT). No. of bitstreams: 1 Teixeira_GilmarValente_M.pdf: 1086398 bytes, checksum: 977e54e017a68937e4ccdcbc30d550dc (MD5) Previous issue date: 2001<br>Resumo: À medida que a globalização é uma realidade mundial e aumenta a competitividade de abastecimento de alimentos, e sendo o Brasil um país tradicionalmente agrícola, torna-se uma prioridade produzir e armazenar cada vez melhor. Nestes processos a qualidade

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39

Zhang, Jing. "Modeling considerations for vadose zone soil moisture dynamics." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0001982.

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40

Robinson, S. Thomas. "Impacts of agricultural drainage and an assessment of diffused aeration in the Serpentine River, British Columbia." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28513.

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Urban expansion of the City of Vancouver has resulted in increased land development of the municipality of Surrey, and more intensive agriculture on the remaining farmland. From 1980 to 1984 five different fish kills in the Serpentine River attributed to low dissolved oxygen were thought to be caused by a combination of agricultural discharges, high autumn water temperatures, as well as rainfall and river flow patterns. In 1985 an experimental instream aeration system was installed in a lower reach of the river in an attempt to provide additional oxygen during the critical autumn period. This

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41

KAY, CHRISTINA L. "COASTAL ARCHITECTURE: DESIGN FOR THE TRANSITION ZONE." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1179496395.

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42

Morrison, Candice N. "Innovative Methods for Characterizing Chlorinated Volatile Organic Compounds in the Vadose Zone." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/333041.

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Chlorinated solvents, such as tetrachloroethene (PCE), trichloroethene (TCE), and carbon tetrachloride (CT), are primary contaminants of concern for a vast majority of federal and state Superfund sites in the US due to their prior widespread use as solvents for numerous industrial and commercial applications. Source-zones containing large quantities of contaminant are typically present at sites contaminated by chlorinated solvents. Particularly in regions such as the SW US, these source zones reside, at least in part, in the extensive vadose zones typical of these regions. There are two prima

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43

Joshi, Bhaskar. "Estimation of diffuse vadose zone soil-water flux in a semi-arid region." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23996.pdf.

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44

Caldwell, Karl Douglas. "Assessment of the root zone water quality model (RZWQM) under Nova Scotia conditions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63494.pdf.

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45

Jenkins, K. W. "Numerical and physical modelling of water waves in the surf zone with obstacles." Thesis, University of Manchester, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503697.

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46

Lynn, Thomas J. "Evaluation and Modeling of Internal Water Storage Zone Performance in Denitrifying Bioretention Systems." Thesis, University of South Florida, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3630914.

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<p> Nitrate (NO<sub>3</sub><sup>-</sup>) loadings from stormwater runoff promote eutrophication in surface waters. Low Impact Development (LID) is a type of best management practice aimed at restoring the hydrologic function of watersheds and removing contaminants before they are discharged into ground and surface waters. Also known as rain gardens, a bioretention system is a LID technology that is capable of increasing infliltration, reducing runoff rates and removing pollutants. They can be planted with visually appealing vegetation, which plays a role in nutrient uptake. A modified bioreten

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47

Lynn, Thomas Joseph. "Evaluation and Modeling of Internal Water Storage Zone Performance in Denitrifying Bioretention Systems." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5260.

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Nitrate (NO3) loadings from stormwater runoff promote eutrophication in surface waters. Low Impact Development (LID) is a type of best management practice aimed at restoring the hydrologic function of watersheds and removing contaminants before they are discharged into ground and surface waters. Also known as rain gardens, a bioretention system is a LID technology that is capable of increasing infliltration, reducing runoff rates and removing pollutants. They can be planted with visually appealing vegetation, which plays a role in nutrient uptake. A modified bioretention system incorporates a

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48

Pratt, W. Aaron. "Streamside Management Zone effectiveness for protecting water quality following forestland application of biosolids." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/34083.

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Biosolids, materials resulting from domestic sewage treatment, are surface applied to forest soils to increase nutrient availability. Retaining streamside management zones (SMZs) can limit nutrient pollution of streams. We delineated 15 m SMZs along three intermittent streams in an 18-year-old Pinus taeda L. plantation. We applied biosolids outside the SMZ on one side of each of the streams maintaining the other side of the stream as control. We collected water samples from the three treated and six reference streams as well as from the perennial stream both upstream and downstream from the in

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49

Farthing, Matthew William. "Early stage ichthyofauna from shallow water habitats of the Angola-Benguela frontal zone." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/50442.

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Early stage fishes (larvae and early juveniles) were collected from an array of shallow water (±1.5m) habitats on the warm-temperate southern Angolan coastline between June 2014 and June 2015. This study, the first assessment of the early stages of coastal fishes in Angola, provides important new understanding of non-estuarine shallow water nursery habitat use by coastal fishes from the region. In total, 51 species from 18 teleost families were observed. The exposed surf zone was dominated by postflexion larvae, while the moderately exposed beach and sheltered bay were dominated by early juven

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50

Ducros, Caroline M. J. "An evaluation of riparian buffer zone policy in UK agricultural catchments." Thesis, University of Brighton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299193.

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