Dissertations / Theses on the topic 'Water diversion'
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Chen, Hui, and Peter F. Ffolliott. "South-to-North Water Diversion Project in China." Arizona-Nevada Academy of Science, 2008. http://hdl.handle.net/10150/296674.
Full textPruneda, Erik Brian. "Use of stream response functions and stella software to determine impacts of replacing surface water diversions with groundwater pumping withdrawals on instream flows within the Bertrand Creek and Fishtrap Creek watersheds, Washington State, USA." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Fall2007/e_pruneda_121907.pdf.
Full textKhalil, Kamal. "Water surface profile modelling for Pinjarra flood diversion channel and economic evaluation." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/2455.
Full textKhalil, Kamal. "Water surface profile modelling for Pinjarra flood diversion channel and economic evaluation." Curtin University of Technology, Department of Civil Engineering, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17589.
Full textZhu, Junlin. "Simulation and design of diversion and detention system for urban stormwater management." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94495.
Full textM.S.
Chan, Che-san Teresa, and 陳芷珊. "Water management in China: the quantitative and qualitative approaches in the eastern route of the south to northwater diversion project." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50702889.
Full textTuran, Kamil Hakan. "Development Of A Computer Program For Optimum Design Of Diversion Weirs." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12605490/index.pdf.
Full textFockler, Matthew N. "Plumbing the Truckee : water, diversion and the creation of community along the Truckee River, Nevada /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1448330.
Full text"August, 2007." Includes bibliographical references (leaves 301-309). Online version available on the World Wide Web. Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2007]. 1 microfilm reel ; 35 mm.
Van, Heerden Morne Jandre. "Control of sediment diversion in run-of-river hydropower schemes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71849.
Full textENGLISH ABSTRACT: Sedimentation and the effects it has on turbine blades was the primary problem identified in run-of-river (RoR) hydropower schemes. Sedimentation in RoR hydropower schemes also increases trash rack blockage and reduces energy output in the long-term. Damage occurs to all underwater parts that come into contact with sediment. The main concern is sediment passing through the hydropower intake and causing turbine damage. The reason for the abrasion and cavitation of turbine blades is increased sediment loads in river channels. This problem can be overcome in two ways. The first is the use of existing lakes or reservoir storage upstream as natural sand traps, and the second is by investigating the three features associated with river bend diversion, which are: the optimum diversion location in a river bend to minimise the abstraction of sediment, the optimum diversion structure angle to limit coarse sediment diversion, and the sediment load diverted through the intake. The first objective of the research was investigated by construction of a physical model of a curved river channel to determine the location of the deepest scour forming on the outside of the bend. The second objective was to test the diversion orientation to maximize the local scour and thereby limiting sediment diversion at the intake. A third objective was to compare mathematical 2D model simulated scour results with the findings of the laboratory tests to evaluate the reliability of the numerical model predictions. Finally different diverted discharge ratios were tested with different intake setups in the physical model, to evaluate the sediment load diverted. . The first experiment in the curved laboratory channel was to predict where the deepest scour takes place without a diversion structure. This was then followed by placing a diversion structure at the maximum scour position, retrieved from experiment one, and by angling the structure with reference to the flow direction. The flow direction vector was placed as a tangent to the bend and orientated at angles of 0⁰, 30⁰, 45⁰ and 60⁰ into the bend direction. The optimum diversion location was found to be positioned on the outside of the bend, approximately 60⁰ into the channel bend. The final position of maximum scour in a 90⁰ bend corresponds with the Sediment Committee and the Chinese Hydraulic Engineering Societies (1992) prediction of 60⁰ into the bend. The optimal diversion had a 30⁰ angle to the flow direction, as this presented the most efficient and effective scouring in front of the model intake. Numerical simulations were performed with the CCHE 2D (hydrodynamics and sediment dynamics) modelling program. The numerical results were compared to the physical results to validate CCHE as a beneficial simulation tool. It was found that the numerical model predicted the scour depths at the intakes tested with an accuracy of 43.8%, which is within the accuracy range of the sediment transport equation used by the numerical model. The final experiment was the diversion of sediment with different intake level heights and discharges. It was evident from the results that low sediment diversion ratios were achieved with a diverted discharge ratio of 50% or less. The intake elevation highest above the channel bed diverted the least sediment. The interrelationship between Diverted Discharge Ratio (DDR), Diverted Froude number Ratio (DFrR) and Diverted Sediment load Ratio (SDR) was established in the study. It is recommended that RoR schemes have sand traps downstream of the diversion structures and that turbines are coated with HVOF to overcome the power loss arising due to the excessive erosion of hydro turbines.
AFRIKAANSE OPSOMMING: Sedimentasie en die invloed wat dit het op turbines was die primêre probleem geïdentifiseer in “run-of-river” (RoR) hidrokrag-skemas. Die sediment wat saam met die water uit ‟n rivier uitgekeer word beskadig die inlaatrooster en verlaag kragopwekking in die langtermyn. Skade word aangerig aan alle onderwatertoerusting en masjinerie wat aan sediment blootgestel word. Die grootste probleem tydens die uitkering van water is die growwe sediment wat daarmee deur die onttrekking inlaat gaan en turbineskade veroorsaak. Soos wat die sedimentlading in die rivier drasties toeneem, sal afslyting en kavitasie van turbinelemme meer gereeld voorkom. Dié probleem kan op twee maniere beperk word. Die een is die gebruik van bestaande opgaardamme stroomop, en die tweede is deur die ondersoek van drie kenmerke van rivierdraaie en uitkeringstrukture, bv. die optimale uitskurings posisie in 'n rivierdraai (sonder ʼn struktuur) om die diepste uitskuringposisie op die buitekant van die draai te bepaal, die optimale uitkeringsstruktuuroriëntasie wat maksimum uitskuring verseker en die sediment uitkering beperk, en die lading van sedimentonttrekking deur die inlaat. Die eerste doelwit van die navorsing is ondersoek deur ʼn fisiese model te bou van ʼn kronkelkanaal en te bepaal waar die diepste uitskring plaasvind op die buitekant van die draai. Die tweede doelwit van die studie was om die optimale uitkeringshoek te bepaal vir 'n uitkeringstruktuur sodat die uitskuring by die inlaat ʼn maksimum is om die uitkering van sediment te beperk. ʼn Derde doelwit was om die akkuraatheid van ʼn wiskundige model se uitskuring voorspelling te toets teen die waargenome laboratorium resultate. Die finale doelwit was om vir verskillende inlaatontwerpe, rivier- en uitkeervloeie die sedimentladings wat uitgekeer word te ondersoek. Die eerste eksperiment in die kronkelende kanaal was voorberei om die optimale uitskuring in die draai te bepaal. Dit is gevolg deur toetse met uitkeerstrukture by die maksimum uitskurings posisie te plaas en die hoek van die struktuur dan te verander met verwysing na die vloeirigting. Die vloeirigting vektor was as 'n raaklyn geplaas op die kanaal draai en georiënteer met hoeke: 0⁰, 30⁰, 45⁰ en 60⁰, in die rigting van die draai. Die optimale uitskurings posisie was aan die buiterand van die kanaal draai gevind, ongeveer 60⁰ in die draai in. Die maksimum uitskuur posisie van 'n 90⁰ kanaal draai stem ooreen met SC en CHES (1992) se resultaat van 60⁰ in die draai in. Daar was ook genoegsame bewyse dat 'n optimale uitkeerwerke oriëntasie van 30⁰ die doeltreffendste en effektiefste uitskuring sal gee. Numeriese simulasies is deur middel van 'n twee dimensionele wiskundige model CCHE 2D (hidro- en sedimentdinamika) uitgevoer. Die numeriese resultate was vergelyk met die laboratoriumresultate om die CCHE program te verifieer as 'n voordelige simulasie program. Daar is gevind dat die wiskundige model die uitskuurdieptes by die inlate met ʼn akkuraatheid van 43.8 % voorspel, wat binne die akkuraatheid is van die sedimentvervoervergelyking wat deur die numeriese model gebruik word. Die finale eksperiment was die uitkering van sediment met verskillende inlaathoogtes en uitkerings sedimentladings. Uit die toetse was dit duidelik dat 'n lae sediment uitkeerverhouding behaal kan word met 'n uitkeerverhouding van 50% en minder. Verdere waarnemings het ook gewys dat die inlaathoogte van die uitkeerstruktuur met die optimale resultate die hoogste bokant die rivierbedding was. Die verwantskap tussen die uitgekeerde deurstromingverhouding, die uitgekeerde Froude getal verhouding en die uitgekeerde sedimentlading is bepaal in die navorsing. Dit word aanbeveel dat sandvangkanale stroomaf van uitkeerwerke geplaas word en dat turbines met HVOF as bedekkingsmateriaal beskerm word om kragverliese as gevolg van buitensporige erosie van die turbines te voorkom.
Khalil, Kamal A. "Water surface profile modelling for Pinjarra flood diversion channel and economic evaluation of assets a risk from flooding /." Full text available, 2007. http://adt.curtin.edu.au/theses/available/adt-WCU20080415.093754.
Full textSmith, Jansen A., Daniel A. Auerbach, Karl W. Flessa, Alexander S. Flecker, and Gregory P. Dietl. "Fossil clam shells reveal unintended carbon cycling consequences of Colorado River management." ROYAL SOC, 2016. http://hdl.handle.net/10150/622496.
Full textCordell, Dana. "Urine Diversion & Reuse in Australia : A homeless paradigm or sustainable solution for the future?" Thesis, Linköping University, Department of Water and Environmental Studies, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8310.
Full textDiverting urine from faeces or mixed wastewater and reusing it to fertilize crops, is a traditional method used in Asia. It is also a contemporary approach to sustainable nutrient and water management in Scandinavia and other parts of Europe. Urine diversion and reuse is a proven socio-technical system that has significant potential benefits on both a local and global scale, such as recirculating scarce plant nutrients like phosphorus back to agriculture, reducing eutrophication of waterways and improving water and sanitation systems. This thesis explores the nature of these benefits in Australia and the global context and what barriers would need to be overcome if a urine diversion and reuse system were implemented in Australia to achieve significant environmental benefits. These questions are investigated through stakeholder interviews in Sweden, to identify the ‘lessons learnt’ from the Swedish experience with urine diversion and reuse, and, through interviews with relevant stakeholders in Australia to identify possible barriers and opportunities, costs and benefits, and roles and responsibilities in the Australian context. Findings from both the stakeholder interviews are triangulated with other sources of knowledge, such as the literature, personal communications and a qualitative assessment of costs and benefits.
This thesis found that while urine diversion is likely to benefit the Australia situation and warrants further research, these benefits are fragmented and spread across a range of discourses and separate institutions. Its acceptance and effective introduction into Australia might therefore be challenged by its lack of a single obvious organisational home. To overcome this and other identified challenges, several recommendations are made. For example, an Australian demonstration trial of urine diversion and reuse is recommended where clear drivers and opportunities exist, such as: in new developments adjacent to agricultural land; in regions where algal blooms are a critical problem and are predominantly caused by municipal sewage discharges; and where synergies with waterless urinals are being considered for water conservation value. This thesis does not promote urine diversion and reuse as the ‘silver bullet’ to Australia’s water and nutrient problems, however it does recommend that it be considered on an equal basis next to other possible options. For example, if reducing nutrient loads on receiving water bodies is a key objective, then a cost-effective analysis of urine diversion and reuse, compared to other options to reduce nutrient loads, could be undertaken, ensuring all relevant costs and benefits to the whole of society are included in the analysis.
Llorens, del Pino Alba. "Diversion of water from a tailings dam : Spillway arrangement and spillway channel designed to be maintenance free for 1000 years." Thesis, KTH, Vattendragsteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208765.
Full textRose, Teresa, and n/a. "AN INTERDISCIPLINARY STUDY INTO THE IMPACTS OF FLOW REGULATION ON AN UPLAND GRAVEL BED RIVERINE ENVIRONMENT: A TRIBUTARY CONFLUENCE IN THE SNOWY RIVER DOWNSTREAM OF JINDABYNE DAM, AUSTRALIA." University of Canberra. Cooperative Research Centre for Freshwater Ecology, 1999. http://erl.canberra.edu.au./public/adt-AUC20080917.153237.
Full textFink, Daniel Francis. "Effects of a pulsing hydroperiod on a created riparian river diversion wetland." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1167401886.
Full textKarapinar, Burcu. "Role Of Hydrology, Sewage Effluent Diversion And Fish On Mass Balance Of Nutrients In A System Of Shallow Lakes Mogan And Eymir, Turkey." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606542/index.pdf.
Full textVidal, Brenda. "On-site sanitation systems - An integrated assessment of treatment efficiency and sustainability." Licentiate thesis, Luleå tekniska universitet, Arkitektur och vatten, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71120.
Full textSmå lokala avloppssystem för insamling och rening av avloppsvatten är vanligt förekommande i omvandlings- och landsbygdsområden i många länder. Dessa system fungerar ofta sämre än förväntat vilket kan leda till effekter på recipienter, ökad risk för folkhälsan och begränsa systemens hållbarhet. En djupare förståelse för hållbarhetsdimensioner och avvägningar mellan olika indikatorer kan stödja planering och implementering av hållbara lokala avloppsystem för specifika sammanhang. Det övergripande syftet med denna uppsats var att utvärdera hållbarhet och funktion av enskilda avloppssystem. Detta utfördes genom att först definiera en uppsättning indikatorer för bedömning av ett antal enskilda avloppsalternativ och sedan utvärdera dem för olika scenarier. Vidare var syftet att undersöka några systems prestanda för rening av hushållsavloppsvatten i en fältstudie. Särskilt fokus lades på reduktion av fosfor (P) och indikatorbakterier på grund av deras relevans i relation till övergödningsrisk och folkhälsoperspektiv. I en multikriteriestudie definierades tolv indikatorer för att bedöma nio typer av enskilda avloppssystem. En referensgrupp som representerade olika intressenter viktade indikatorerna för att uttrycka den relativa betydelsen av varje indikator. Referensgruppen gav systemens robusthet, risk för utsläpp av patogener, och näringsreduktion störst vikt. Att bedöma robusthet var en utmaning i studien, eftersom det finns ett gap mellan hur systemen förväntas fungera, och hur de faktiskt fungerar i praktiken, mestadels på grund av felaktig konstruktion, drift och underhåll. Indikatorernas diskriminerande effekt räknades ut med entropimetoden, som visade att indikatorerna energiåtervinning och kapitalkostnad hade liten inverkan på alternativens slutgiltiga rangordning. En scenarioanalys genomfördes baserad på socioekonomiska och geografiska faktorer. En hållbarhetsrankning erhölls genom att använda ELECTRE III-metoden. Överlag rankades system som separerar gråvatten – svartvatten samt urinseparerande system högst i basfallsscenariot och när näringsrelaterade indikatorer var viktiga (scenario 2). Markbäddar och infiltrationsanläggningar var de mest hållbara alternativen när rening och återvinning av näringsämnen inte var viktigt (scenario 1) och (i kombination med kemisk P-rening) när indikatorer relaterade till energi och klimatförändringar viktades högst (scenario 3). När det gäller P-rening, gav system med kemisk rening ett bättre utfall än de med alkaliska P-filter. I en fältstudie utvärderades tolv enskilda avloppsanläggningar med markbaserade system och alkaliska P-filter med avseende på rening och utsläpp av organiskt innehåll, totalt och löst P och indikatorbakterier (E.coli, totala koliformer, intestinala enterokocker och C.perfringens). Resultaten visade att de markbaserade systemen generellt hade låg P-reningskapacitet och ofta överskreds kriterierna för utmärkt vattenkvalitet enligt EUs badvattendirektiv avseende intestinala enterokocker och C. perfringens. Endast ett markbaserat system av åtta uppvisade en P-rening som låg under de svenska riktlinjerna för områden med normal skyddsnivå, med en utsläppskoncentration på under 3 mg L-1 tot-P. Detta indikerade att markbäddar behöver nedströms placerade reningssteg för att uppfylla nuvarande riktlinjer för utsläpp av P. Alkaliska P-filter avskilde generellt P effektivt. Trots högt pH-värde kunde ingen ytterligare minskning av bakterieinnehåll i avloppsvattnet från P-filtren påvisas statistiskt. Utsläppen av indikatorbakterier uppvisade emellertid måttliga positiva korrelationer med utsläpp av P och organiskt material, vilket visar på en viss potential att P-filtren kan fungera som ett ytterligare poleringssteg även för bakterier.
Khabbaz, Saberi Hamid. "Hydraulic characteristics and performance of stormwater pollutant trap respect to weir's height, flow gradients, pipe diameters and pollutant capture." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/2143.
Full textGorbach, Kathleen R. "Benthic Community Structure Response to Flow Dynamics in Tropical Island and Temperate Continental Streams." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354226302.
Full textRich, Kyle. "Bridging Troubled Waters: Examining Culture in the Canadian Red Cross' Swimming and Water Safety Program." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24278.
Full textWhittenberger, Jessica. "Eukaryote diversity in Chicago area water samples." Connect to resource, 2007. http://hdl.handle.net/1811/26597.
Full textTitle from first page of PDF file. Document formatted into pages: contains 30 p.; also includes graphics. Includes bibliographical references (p. 28-30). Available online via Ohio State University's Knowledge Bank.
Barakoti, Sonia. "Diversity Analysis of Water Systems in the US." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo152545897931429.
Full textRoblin, Rachel. "Water Quality Modeling of Freshwater Diversions in the Pontchartrain Estuary." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/693.
Full textNeupane, Jeevan. "Water Quality Modeling of Freshwater Diversions in the Barataria Basin." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1255.
Full textLawler, Stephanie Nichole. "Characterization of Bacterial Diversity in Cold-Water Anthothelidae Corals." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6295.
Full textKupel, Douglas E. (Douglas Edward) 1956. "Diversity through adversity : Tucson Basin water control since 1854." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/191882.
Full textO'Connell, Davidson Julia. "The employment relation : diversity and degradation in the privatised water industry." Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294386.
Full textNigro, Lisa M. "Distribution and Diversity of Bacterial Chemolithotrophs in Marine and Freshwater Sediments." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/NigroLM2006.pdf.
Full textGarrido, Molina Laura. "Molecular characterization of microbial diversity in wastewater treatment and reuse." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/96237.
Full textWastewater generation is an inevitable consequence of human activities. These activities modify the characteristics of the original waters, contaminating them and invalidating subsequent application for other uses. Dumping of raw sewage causes damage, sometimes irreversible, to the environment. On the other hand, the discharge of untreated sewage poses risks to public health. Thus, wastewater treatment becomes an important need in our society. Wastewater treatment plants constitute one of the most important biotechnological processes used worldwide to treat municipal and industrial sewage. From a biological point of view, microorganisms play an important role in wastewater treatment since they are the main responsible of the remove of organic matter and nutrients from this sewage. Furthermore, water reuse is becoming increasingly important as a component of sustainable management of water resources. In this thesis we investigated the composition of microbial communities in different environments related to wastewater treatment and reuse. First, we studied and compared the microbial communities found in conventional processes with two atypical treatment systems (activated sludge from a seawater-processing EDAR and constructed wetlands). On the other hand, we determined how different was the microbial profile of a treated wastewater versus a natural freshwater, and tried to find out an alternative indicator of water quality. Finally, we examined the microbial population associated with the problems arising from water reuse. Samples of a marine activated sludge were analyzed by using the full-cycle rRNA approach (denaturing gradient gel electrophoresis, clone libraries and in situ hybridization), obtaining a picture of the composition of the community completely different from a conventional activated sludge, with particularly a low presence of Betaproteobacteria. In addition, detection of the functional gene amoA corroborated the presence of ammonia oxidizers, corresponding probably to different genera from those described in the literature. On the other hand, the microbial communities found in experimental constructed wetlands belonged to species related with organic matter removal. The study of the profiles of these microbial communities allowed determining the effect of the type of plant, hydraulic design and organic matter load of these systems in their composition. Comparing our atypical treatment systems with conventional ones, we can conclude that each system has its specific microbial community, adapted to its environmental conditions, with the same functions being carried out by different groups. Besides, examination of microbial diversity profiles of treated wastewater from different EDARs and comparison with natural non-contaminated water showed that sewage effluents have a common fingerprint, which differs from natural water. Thus, taking into account the most abundant groups found in these types of waters, we proposed the use of the Bacteroidetes, Gammaproteobacteria and Nitrospira / Betaproteobacteria ratio as an alternative indicator of ecological water quality. Concerning water reuse, we focused on an example of a biofouling problem derived from the use of reclaimed water in a drip irrigation system. In these biofilms the microbial community was mainly composed of thermophilic and sporulated microorganisms, suggesting that high temperatures within the irrigation infrastructure selected these populations. Thus, it seemed that the conditions in the system may be more important than the composition of reclaimed water itself.
MacRae, Sarah Catherine. "The diversity and structure of Escherichia coli populations in fresh water environments." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/79721.
Full textDissertation (MSc)--University of Pretoria, 2013.
NRF
Microbiology and Plant Pathology
MSc
Unrestricted
Zhang, Rui. "Bacterioplankton in Hong Kong waters : diversity, dynamics, and mortality /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?BIOL%202007%20ZHANGR.
Full textGarrick, Dustin E. "Explaining Institutional Diversity in Emerging Markets for Environmental Flows: A Transaction Costs Approach to Comparative Policy Evaluation in the Columbia Basin." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195852.
Full textChivukula, Vasanta Lakshmi. "Commensal fecal bacteria : population biology, diversity, and usefulness as indicator organisms in reclaimed water." [Tampa, Fla] : University of South Florida, 2005. http://purl.fcla.edu/usf/dc/et/SFE0001334.
Full textGrossiord, Charlotte. "Impact of tree species diversity on water and carbon relations in European forests." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0155/document.
Full textBiodiversity is known to support and boost a wide range of forest ecosystem functions and services like productivity and resistance against insect pests and diseases. However, whether tree species diversity also promotes water and carbon acquisition and use in forest ecosystems is still unclear. Furthermore, in the current context of global warming, information on how tree species diversity can influence the response of forest ecosystems to extreme climatic events such as drought are urgently needed. In this framework, the objective of my PhD thesis was to determine how tree species diversity influences important functions of the water and carbon cycle including transpiration, carbon isotope composition and water extraction depth at the tree- and ecosystem-Scale under contrasting soil water conditions. My work was conducted within the FunDivEUROPE project in a network of permanent forest stands and tree plantations across a North-South gradient in Europecovering a wide range of climatic conditions. I found considerable variability among species or forest types in the response of transpiration and carbon isotope composition at the tree- and ecosystem-Scale across Europe. Species diversity did not affect the water and carbon relations of tree species and forest ecosystems under non-Limiting soil water conditions. However, a strong effect of species diversity was observed under drought conditions in some forest types. Based on these data, I discuss the potential mechanisms of species interactions that may explain the observed patterns. I also point out that the influence of species diversity is highly context-Dependent, and changes with local environmental and climatic conditions. In terms of forest management applications, I suggest that, at least in some regions, controlling for tree species diversity along with stand density and total basal area could be recommended to help forests adapt to drier conditions
Al-Saffar, Dina A. H. "SIMO/MIMO body-centric space-time diversity over software-defined radio." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/32153.
Full textWilson, Alan Elliott. "Cyanobacteria-Grazer Interactions: Consequences of toxicity, morphology, and genetic diversity." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-04072006-125946/.
Full textKlausmeier, Christopher, Committee Member ; Montoya, Joseph, Committee Member ; Snell, Terry, Committee Member ; Sarnelle, Orlando, Committee Member ; Hay, Mark, Committee Chair.
Schindler, Markus. "Effects of litter diversity, leaf quality and water chemistry on litter decomposition in streams /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16789.
Full textHuang, Tieshi. "Diversity and transport of bacteria and viruses in soils following irrigation with recycled water." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/7033.
Full textix, 42 leaves
Jonavičienė, Kristina. "Genetic diversity of Phleum spp. and identification of genes involved in water stress response." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20120508_105857-18465.
Full textPasitelkus agromorfologinius, kokybės ir biocheminius – molekulinius metodus ištirtos lietuviškos kilmės pašarinių, žemaūgių bei stepinių motiejukų veislės, selekcinės linijos bei laukiniai ekotipai. Fiziologiniai sausros atsparumo tyrimų rezultatai įrodė, kad stepiniai motiejukai turi geriau išvystytą atsparumo sausrai mechanizmą. Pirmą kartą motiejukuose aptikti ekspresuojami atsparumo sausrai kandidatiniai genai HRM metodu sužymėti daugiametės svidrės genolapyje.
Males, Jamie Oliver. "Structure-function relationships in the water-use strategies and ecological diversity of the Bromeliaceae." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267920.
Full textMa'arup, Rohayu. "The use of genetic diversity from emmer wheat to improve bread wheat." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16634.
Full textBoyd, Eric Stephen. "Biology of acid-sulfate-chloride springs in Yellowstone National Park, Wyoming, United States of America." Diss., Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/boyd/BoydE0807.pdf.
Full textBarkaoui, Karim. "Structure fonctionnelle et écohydrologie de parcours méditerranéens établis le long d’un gradient de disponibilité en eau." Thesis, Montpellier, SupAgro, 2013. http://www.theses.fr/2013NSAM0030/document.
Full textUnderstanding the relationships between ecohydrology and functional structure of plant communities is a timely issue in plant ecology. From ecosystem to species levels, this works investigated the effects of a resource availability gradient on the structure and functioning of Mediterranean rangelands in Southern France. Using a water-balance modeling approach, differences in water-use at the ecosystem level were quantified across five contrasting years, accounting for the variability in both soil characteristics and vegetation functioning. Plant water-use and productivity scaled with soil water storage capacity and its filling rate, suggesting a functional equilibrium between plant communities and local water availability. Using a trait-based approach, we then showed that the ratio of total leaf area of the community on total root area determined an allometric relationship between potential evapotranspiration and water uptake capacity. The “coordination” between above- and belowground compartment of the vegetation was achieved by a suite of architectural and morphological adaptations. Modifications of species relative abundances and species turn-over explained morphological and functioning adaptations to cope with limiting resources. Finally at species level, a removal experiment allowed to quantify the relative importance of water limitations and effects of plant-plant interaction on individual plant productivity of three target species of graminoïds. The importance of competition increased with soil resource availability and depended more on trait-trait hierarchical distances among species than standing biomass. Competition among plants affects the axes of the functional niche of species independently, leading to the convergence of leaf dry matter content towards low values but to greater functional divergence for plant height. Overall, this functional approach provided an integrative understanding of the role of plant diversity in the response of ecological systems to changes in water availability. Furthermore, these results on ecohydrological properties of natural communities can contribute to the design of complex agro-ecosystem better adapted to intense droughts predicted under climate change
King, Andrew Giuseppe. "Interactions between riverbed morphology, water chemistry and microbial diversity, and its impact on pollutant biodegradation." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/71000/.
Full textFawcett, James. "Muddy Waters: A Molecular Approach to Clarifying Freshwater Mussel Diversity in Australia." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/367764.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Science, Environment, Engineering and Technology
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Peter, Hannes. "Diversity and Ecosystem Functioning : Redundancy and Resilience in Freshwater Bacterial Communities." Doctoral thesis, Uppsala universitet, Limnologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160780.
Full textAlves, Cristina Consolado Santos. "Métodos e medições de caudais. Análise e comparação de diversos métodos hidrométricos." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/3945.
Full textIn Portugal there are numerous water resources, water potential distributed mainly in small and medium rivers. There is urgent need of quantifying and managing these resources. The Division of Water Resources INAG, is responsible for managing the hydrometric network in the country, for decades the work of hydrometry is developed, naturally over time the technological evolution of tools and techniques for measuring the quantities involved the hydraulic phenomena. For decades the technologies for measuring water velocity and calculation methods have been refurbished. Nowadays there is a wide variety of equipment with different features and functionalities, for the method of measurement and calculation of flow. For a proper quantification management of water resources is essential, flow measurements in various streams, with the knowledge of these values and their evolution over time, it is possible to determine a flow curve, which is representative of the flow at a given period of time. This work has as objective an analysis to historical data relating to joint measurements of water depth and corresponding flow, the traditional method, which was used by INAG in order to get their flow curves. Also covered are the different flows measuring devices and comparison between the latest electromagnetic and Stream Pro.
Stamp, Michelle. "Oomycota in Scottish water catchments : diversity and relationships between species, riparian land use and ecosystem function." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=230062.
Full textVega-Rodriguez, María. "Influence of Water Quality on Stony Coral Diversity and Net Community Productivity in the Florida Keys." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6598.
Full textRamoejane, Mpho. "Genetic diversity, evolutionary relationships and conservation of southern African Labeo fishes in relation to water management." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/5209.
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