Tesis sobre el tema "Water Environment Monitoring"
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CATANIA, FELICE. "Spectrophotometric monitoring system for continuous heavy metal detection in water environment". Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2809315.
Texto completoHellmér, Elin. "Using eDNA to improve environmental monitoring for water bodies effected by hydropower in Sweden". Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235981.
Texto completoMålet med denna rapport är att bidra till kunskapsläget kring miljöövervakning genom att öka förståelsen för hur eDNA, elfiske och provfiske kan användas för att undersöka fisk biodiversitet. Målet är också att förstå om fisk-index utvecklade inom ramen för det Europeiska vattendirektivet reflekterar biodiversitet samt om data från eDNA kan utgöra input till dessa index. För att uppfylla dessa mål användes tre metoder. För att etablera vilken av metoderna eDNA, elfiske och provfiske är mer lämpad att mäta de olika dimensionerna av biodiversitet (artrikedom, distribution av arter och genetisk diversitet), genomfördes en litteraturstudie. Slutsatsen kunde dras att eDNA mäter artrikedom med högst noggrannhet, elfiske mäter distribution av arter mer detaljerat och att provfiske överträffas av både eDNA och elfiske i alla dimensioner. Både elfiske och provfiske kan samla data för analys av genetisk diversitet, men elfiske överträffar provfiske gällande hur många arter som fångas, vilket gör elfiske mer lämpligt som metod att samla in data för genetisk analys. För att få praktisk insikt i ett fall där eDNA använts, granskades en fallstudie från Spjutmo (i Dalarnas län). eDNA genererade mer detaljerad information om artrikedom än elfiske i detta fall. Datan genererad av eDNA kring relativ abundans mellan arter skulle kunna tolkas som ett mått på distribution av arter. Data genererad av elfiske kan å andra sidan användas som input till olika index för distribution av arter. Författaren veterligen, genererade varken eDNA eller elfiske mått på genetisk diversitet i detta specifika fall. Två personer, en från Fortum och en från länsstyrelsen Dalarna intervjuades också för att få insikt i deras syn på potentialen av att använda eDNA som ett miljöövervakningsverktyg. Båda intervjupersonerna pekade på att en bättre förståelse av de relativa abundansvärdena indikerar är önskad. Båda intervjupersonerna pekade på att det är en viktig aspekt för att metabarcoding studier ska vara effektiva i nuvarande miljöövervakning. För att förstå om fisk-index utvecklade för EU’s vattendirektiv reflekterar biodiversitet, genomfördes en komparativ litteraturstudie av index. Alla index förutom ett inkorporerar eller delvis inkorporerar artrikedom. Bara fem indikerar eller delvis indikerar artrikedom. Distribution av arter inkorporeras eller delvis inkorporeras av två index som också indikerar eller delvis indikerar distribution av arter. Inom den komparativa litteraturstudien av index, studerades även potential att fungera som input av data genererad av eDNA till indexen. Data genererad av eDNA kan i dagsläget fungera som input till ett av indexen. Fem index använder någon form av proportionell data (t.ex. proportion av toleranta arter), som möjligen skulle kunna ges av eDNA. Indexet till vilket det är möjligt att använda eDNA data använder närvarande-ej närvarande information som input.
Meyer, Matthias. "The adjoint method of optimal control for the acoustic monitoring of a shallow water environment". Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210610.
Texto completoDespite the variety of applications in these research fields, adjoint methods have only very recently drawn attention from the ocean acoustics community. In ocean acoustic tomography and geoacoustic inversion, where the inverse problem is to recover unknown acoustic properties of the water column and the seabed from acoustic transmission data, the solution approaches are typically based on travel time inversion or standard matched-field processing in combination with metaheuristics for global optimization.
In order to complement the adjoint schemes already in use in meteorology and oceanography with an ocean acoustic component, this thesis is concerned with the development of the adjoint of a full-field acoustic propagation model for shallow water environments.
In view of the increasing importance of global ocean observing systems such as the European Seas Observatory Network, the Arctic Ocean Observing System and Maritime Rapid Environmental Assessment (MREA) systems for defence and security applications, the adjoint of an ocean acoustic propagation model can become an integral part of a coupled oceanographic and acoustic data assimilation scheme in the future.
Given the acoustic pressure field measured on a vertical hydrophone array and a modelled replica field that is calculated for a specific parametrization of the environment, the developed adjoint model backpropagates the mismatch (residual) between the measured and predicted field from the receiver array towards the source.
The backpropagated error field is then converted into an estimate of the exact gradient of the objective function with respect to any of the relevant physical parameters of the environment including the sound speed structure in the water column and densities, compressional/shear sound speeds, and attenuations of the sediment layers and the sub-bottom halfspace. The resulting environmental gradients can be used in combination with gradient descent methods such as conjugate gradient, or Newton-type optimization methods tolocate the error surface minimum via a series of iterations. This is particularly attractive for monitoring slowly varying environments, where the gradient information can be used to track the environmental parameters continuously over time and space.
In shallow water environments, where an accurate treatment of the acoustic interaction with the bottom is of outmost importance for a correct prediction of the sound field, and field data are often recorded on non-fully populated arrays, there is an inherent need for observation over a broad range of frequencies. For this purpose, the adjoint-based approach is generalized for a joint optimization across multiple frequencies and special attention is devoted to regularization methods that incorporate additional information about the desired solution in order to stabilize the optimization process.
Starting with an analytical formulation of the multiple-frequency adjoint approach for parabolic-type approximations, the adjoint method is progressively tailored in the course of the thesis towards a realistic wide-angle parabolic equation propagation model and the treatment of fully nonlocal impedance boundary conditions. A semi-automatic adjoint generation via modular graph approach enables the direct inversion of both the geoacoustic parameters embedded in the discrete nonlocal boundary condition and the acoustic properties of the water column. Several case studies based on environmental data obtained in Mediterranean shallow waters are used in the thesis to assess the capabilities of adjoint-based acoustic inversion for different experimental configurations, particularly taking into account sparse array geometries and partial depth coverage of the water column. The numerical implementation of the approach is found to be robust, provided that the initial guesses are not too far from the desired solution, and accurate, and converges in a small number of iterations. During the multi-frequency optimization process, the evolution of the control parameters displays a parameter hierarchy which clearly relates to the relative sensitivity of the acoustic pressure field to the physical parameters.
The actual validation of the adjoint-generated environmental gradients for acoustic monitoring of a shallow water environment is based on acoustic and oceanographic data from the Yellow Shark '94 and the MREA '07 sea trials, conducted in the Tyrrhenian Sea, south of the island of Elba.
Starting from an initial guess of the environmental control parameters, either obtained through acoustic inversion with global search or supported by archival in-situ data, the adjoint method provides an efficient means to adjust local changes with a couple of iterations and monitor the environmental properties over a series of inversions.
In this thesis the adjoint-based approach is used, e.g. to fine-tune up to eight bottom geoacoustic parameters of a shallow-water environment and to track the time-varying sound speed profile in the water column.
In the same way the approach can be extended to track the spatial water column and bottom structure using a mobile network of sparse arrays.
Work is currently being focused on the inclusion of the adjoint approach into hybrid optimization schemes or ensemble predictions, as an essential building block in a combined ocean acoustic data assimilation framework and the subsequent validation of the acoustic monitoring capabilities with long-term experimental data in shallow water environments.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
MARQUES, MARIA N. "Avaliacao do impacto de agrotoxicos em areas de protecao ambiental, pertencentes a bacia hidrografica do rio Ribeira de Iguape, Sao Paulo. Uma contribuicao a analise critica da legislacao sobre o padrao de potabilidade". reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11193.
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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP
Lundmark, Annika. "Monitoring transport and fate of de-icing salt in the roadside environment : Modelling and field measurements". Doctoral thesis, KTH, Mark- och vattenteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4615.
Texto completoLundmark, Annika. "Modelling the impacts of deicing salt on soil water in a roadside environment". Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280.
Texto completoGitonga, Jeremiah Njeru Lewis. "Monitoring and modeling crop growth, water use and production under dry-land environment North-West of Mount Kenya /". [S.l.] : [s.n.], 2005. http://www.zb.unibe.ch/download/eldiss/05njeru_j.pdf.
Texto completoTsui, Man-leung y 徐文亮. "Biological monitoring and its value in assessing the marine environment of Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B3125357X.
Texto completoMAIA, FRANCISCO J. de O. "Aspectos da gestao ambiental em empresas que utilizam analises de agua". reponame:Repositório Institucional do IPEN, 2003. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11124.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Santagostino, S. F. "AQUATIC POLLUTION AND BIOLOGICAL MONITORING OF THE MARINE ENVIRONMENT: TOXICOLOGY, HISTOPATHOLOGY AND ECOLOGICAL RISK OF SELECTED FISH SPECIES". Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/350847.
Texto completoEmelogu, Emmanuel Steven. "Combined effects of bioavailable organic contaminants in the aquatic environment". Thesis, Robert Gordon University, 2013. http://hdl.handle.net/10059/840.
Texto completoPouzol, Tanguy. "Monitoring and modelling of pharmaceuticals in wastewater : Daily and hourly loads in both hospital and urban wastewater". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI009/document.
Texto completoDaily and hourly loads of 15 pharmaceutical molecules at the inlet of a wastewater treatment plant have been measured over 3 years and modelled for both an urban catchment of 16 000 inhabitants and a hospital of 450 beds. Some molecules are never or rarely quantified. Daily loads range from 0.6 to 564 g/day depending of the molecule and the 24 h measurement campaign. Seasonal or weekly patterns are not identified. Pharmaceuticals hourly loads dynamics are distinctive from one another and from wastewater flow. The measured hourly loads are severely impacted by the random behaviour of the patients when the daily mass consumed is low. Thus, the average dynamics is difficult to identify. The main hypothesis to model pharmaceuticals loads in wastewater is that they result from the following steps: pharmaceuticals sales or distributions, human consumption, metabolism and excretion. Pharmaceuticals sales for the urban catchment and distribution for the hospital have been collected at different space and timescales (respectively 1, 6 and 223 pharmacies and daily, weekly and monthly). Larger scales are more reliable for magnitude but the variability of the smaller ones is closer to the variability observed in the measurements. The quantities of pharmaceuticals sold or distributed range from 0.4 to 1 600 theoretical patients per day. Associating measured daily loads with sales or distributions, no linear correlation is found. A minute time step stochastic model is proposed and applied to both sites. It produces reliable and accurate results for both daily and hourly loads. However, results are difficult to interpret when only a few patients are consuming a pharmaceutical. Also, the model does not reproduce the inherent specificity of the hospital. In addition, the model is also able to predict the domestic wastewater flow of an urban catchment with great accuracy for both daily volumes and dynamics
JR, MARCOS AURELIO PINTO MARZANO. "ROBOTIC SYSTEM FOR MONITORING WATER QUALITY IN LENTIC ENVIRONMENTS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=36947@1.
Texto completoCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Nas últimas décadas, a crescente conscientização ambiental levou ao reconhecimento da necessidade do uso responsável dos recursos hídricos. Para garantir isso, a boa gestão de reservatórios hídricos requer um monitoramento ambiental adequado, com medições confiáveis dos parâmetros de qualidade da água em vários pontos do reservatório, permitindo o controle da qualidade da água e seus impactos na fauna, flora e comunidades ribeirinhas dos reservatórios. O monitoramento das variáveis ambientais dos reservatórios é atualmente realizado por processo tradicional de coleta manual. Infelizmente, no Brasil, as iniciativas de produzir um sistema robótico aquático com tecnologia nacional e de baixo custo, quando comparado a equivalentes importados, são ainda raras e se restringem a algumas poucas instituições acadêmicas, não tendo sido localizado nenhum fabricante comercial deste tipo de veículo no país. Visando preencher esta lacuna, o presente trabalho teve como objetivo o desenvolvimento do protótipo de um sistema robótico aquático capaz de se locomover autonomamente em lagoas, lagos e reservatórios, coletando informações físico-químicas da água e armazenando estes dados na memória. Além disso, foi incluído no protótipo uma câmera de vídeo, sistema de iluminação e um sistema de controle remoto, objetivando o controle pela equipe em terra. Nos testes realizados em dias ensolarados e chuvosos, o robô apresentou boa dirigibilidade, estabilidade e manobrabilidade. O vaso de pressão do sistema robótico resistiu às pressões necessárias durante os testes, a eletrônica conseguiu atender as especificações de projeto e o software conseguiu estabelecer um controle de navegação, cumprindo o trajeto de uma rota estabelecida.
In recent decades, the growing environmental awareness has led to the recognition of the need for responsible use of water resources. To ensure this, the good management of water reservoirs requires adequate environmental monitoring, with reliable measurements of water quality parameters in various parts of the reservoir, allowing the control of water quality and its impacts on fauna, flora and riverine communities of the reservoirs. Monitoring environmental variables of the reservoirs is currently performed by traditional process of manual collection. Unfortunately, in Brazil, initiatives to produce a water robotic system with national and low cost technology, compared to imported equivalents, are still rare and restricted to a few academic institutions, and no commercial manufacturer of this type of vehicle was found in the country. Aiming to fill this gap, the main objective of this study was to develop a prototype of a water robotic system capable of autonomously navigate in ponds, lakes and reservoirs, collecting physicochemical information of water and storing this data in memory. Moreover, a video camera, illumination and a remote control system were included in the prototype, allowing the team on the ground to control the prototype. In tests conducted in sunny and rainy days, the robot presented good handling, stability and maneuverability. The robotic system pressure vessel resisted pressures required during testing, the electronics met the design specifications and the software was able to establish a navigation control, fulfilling the path of an established route.
Symes, Elizabeth Anne. "Freshwater Cyanobacteria within Extreme Environments". Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15606.
Texto completoKilungo, Aminata Peter. "Drinking Water Quality Monitoring". Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/306073.
Texto completoNam, Kijin. "Optimization of paths and locations of water quality monitoring systems in surface water environments". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24745.
Texto completoCommittee Chair: Aral, Mustafa; Committee Member: Guan, Jiabao; Committee Member: Kim, Seong-Hee; Committee Member: Roberts, Philip; Committee Member: Uzer, Turgay.
Narayan, Raghu B. (Raghu Bangalore) 1977. "Wireless sensor network for ground-water monitoring". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84823.
Texto completoLeaf 78 blank.
Includes bibliographical references (leaves 76-77).
by Raghu B. Narayan.
M.Eng.
Kwan, Cheuk Hung. "Biosensors for biological nutrient monitoring /". View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?AMCE%202004%20KWAN.
Texto completoHiggins, Julie Marie. "Monitoring of polyelectrolytes in waters, process streams and the environment". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325128.
Texto completoDunn, Joseph G. "Comparative analysis of the benthic infauna and sediment for two small estuaries in Connecticut /". Click for abstract, 1998. http://library.ctstateu.edu/ccsu%5Ftheses/1488.html.
Texto completoThesis advisor: Dr. Clayton Penniman. " ... in partial fulfillment of the requirements for the degree of Master of Science in Biology." Includes bibliographical references (leaves 59-63).
Groppo, Juliano Daniel. "Estudo de tendências nas séries temporais de qualidade de água de rios do estado de São Paulo com diferentes graus de intervenção antrópica". Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-28072005-140119/.
Texto completoThe knowledge of time trends of water quality is important for the environmental diagnosis of hydrographic basins, allowing the evaluation of how water bodies are responding through the years, in qualitative terms, to the growing antropogenic interventions (actions). The aim of this work is to characterize the water quality of rivers of the Piracicaba, Mogi-Guaçu, Turvo Grande, Peixe, Aguapeí, São José dos Dourados and Alto Paranapanema basins using stations monitored by CETESB (Companhia de Tecnologia de Saneamento Ambiental), in the period from 1979 to 2001. The biogeochemical parameters evaluated concerning its time trend and magnitude were: dissolved oxygen (DO), biochemical oxygen demand (BOD), total nitrogen, nitrate, total phosphorus, chloride, ammonia and fecal coliforms. Time trend analysis demands a specific methodology, since the time series obtained are not normally distributed, the sampling are performed irregularly, it can present seasonal periodicities and dependence on the rivers discharges. This methodology is divided in graphical analysis and application of trend tests, where initially an exploratory analysis of data is performed, followed by confirmation through statistical tests. The results showed that in a general there exists degradation of the water quality in most of the basins, represented by the positive trends of the parameters (BOD, nitrogens, total phosphorus, clorate and fecal coliforms) and negative trend of the parameter (DO). Among the analysed hydrographic basins, the Piracicaba river basin is the most severely affected with higher variations in the magnitude represented by the regression coeficient, followed by the basins of the Mogi-Guaçu, Turvo Grande, Peixe and Aguapeí rivers. On the other hand, the Alto Paranapanema and São José dos Dourados basins are the least affected.
Sherchan, Samendra Prasad. "Monitoring Microbial Water Quality via Online Sensors". Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293470.
Texto completoLam, Chi-chung y 林志宗. "Monitoring of beach water quality in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31254275.
Texto completoPastorinho, Manuel Ramiro Dias. "Cost-effective methods for monitoring environmental contamination in transitional waters". Doctoral thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/9400.
Texto completoA avaliação de ecossistemas aquáticos, tradicionalmente realizada pela análise de parâmetros físicos e químicos tem-se revelado manifestamente insuficiente. Por norma as concentrações de poluentes variam rápida e amplamente e a medição destas parametrias representa unicamente uma pequena janela temporal de uma realidade contínua e complexa. O aparecimento de índices bióticos veio preencher parcialmente esta lacuna dado que os organismos aquáticos actuam como monitores a tempo inteiro da qualidade ambiental, fornecendo informação de difícil acesso por outros meios. A necessidade do estabelecimento de relações mecanísticas entre tóxicos e efeitos observados conduziu à tentativa de ligação entre os perfis de toxicidade obtidos em ensaios laboratoriais e os obtidos no terreno. Considerando a saúde dos seres vivos como um resultado de interacções sinergísticas ou antagonísticas de uma combinação de agentes poluentes e/ou de stress, extrapolações relativas ao estado de "saúde" dos ecossistemas eles próprios podem ser obtidas. Um reduzido número de organismos pode assim ser utilizado com este propósito, a efectividade da correlação estabelecida depende da sua relevância ecológica e do realismo das concentrações dos tóxicos utilizados. Neste estudo o apuramento das concentrações de metais pesados na Ria de Aveiro (uma lagoa costeira de hidrografia complexa e diversas fontes de emissão destes elementos) foi realizado por meio de amostragem de sedimentos de fundo e o antípode Echinogammarus marinus foi usado como organismo-teste para determinação de efeitos biológicos. Os invertebrados, em particular os crustáceos, são frequentemente seleccionados para este efeito dada a sua relevância nas cadeias alimentares, facilidade de manutenção laboratorial e grande dispersão. Bioensaios in situ, devidamente suportados por testes laboratoriais com metais em misturas, foram realizados utilizando como parâmetro a anorexia de pós-exposição. Esta avaliação foi estendida a toda a distribuição conhecida para a espécie em termos latitudinais. A influência exercida por factores como o estágio de desenvolvimento, género e o estado nutricional anterior à exposição foram avaliados. Foi ainda estudada a existência de uma possível correlação entre a presença de metais e a incidência de intersexo. E. marinus revelou ser um biomonitor sensível do potencial tóxico de metais pesados em concentrações ambientais ecologicamente relevantes, que pode ser utilizado em toda a abrangência biogeográfica do organismo. Um bioensaio in situ, simples e custo-eficiente é apresentado. O bioensaio destina-se à monitorização de águas salobras e salgadas para a presença de metais, permitindo o apoio à decisão na alocação de recursos humanos e financeiros por norma limitados.
The traditional assessment of aquatic ecosystems, based upon the analysis of physical and chemical parameters has been proven insufficient. Concentrations of pollutants usually fluctuate widely and rapidly and those analyses are but a freeze frame of a continuous complex reality. The use of biotic indexes partly covered this shortcoming since aquatic organisms act as full-time monitors of environmental quality providing otherwise hardly accessible information. The need for the establishment of mechanistic correspondences between toxicants and detected effects lead to attempt of coupling toxic profiles obtained in laboratory with the ones observed in the field. By considering the condition or health of organisms as a response to synergistic and antagonistic effects of combined pollutants and/or stressors, extrapolations towards the health of the ecosystem itself can be drawn. A restrict number of organisms can be used for this purpose with the effectiveness of the connection relying mainly on their ecological relevancy and in the use of realistic toxicant concentrations. In our study a survey was performed upon the sediments of Ria de Aveiro (a coastal lagoon with complex hydrography and varied heavy metal sources) as a means to determine heavy metal concentrations, and an amphipod, Echinogammarus marinus was used as test organism. Invertebrates, and particularly crustaceans, have been highly favored as organisms of choice due to their relevancy in food chains, easiness of culture and ubiquitousness. In situ bioassays, duly backed by ex situ toxicity tests using metal mixtures with post exposure feeding inhibition as endpoint were performed. This evaluation was extended to encompass the entire latitudinal distribution of the organism. Furthermore the influence exerted by life stage, gender and pre-exposure nutritional state upon metal toxicity were investigated. A correlation between metal contamination and the incidence of Intersex was attempted. We conclude that Echinogammarus marinus is a sensitive biomonitor of the toxic potential of metals at environmental realistic concentrations, suitable to be used at the entire breadth of its biogeographic distribution. A simple, cost effective in situ bioassay is presented, destined to screen brackish and saltwater bodies for metals presence, thus helping decision making in the correct allocation of usually limited financial and human resources.
Bögershausen, Sebastian K. (Sebastian Karl Friedrich) 1973. "Architecture of near real-time monitoring systems for water distribution systems". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84258.
Texto completoIncludes bibliographical references (leaf 73).
by Sebastian K. Bögershausen.
M.Eng.
Kruglick, Alex W. "Water Quality Monitoring in a Pilot Marine Integrated Aquaculture System". Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4110.
Texto completoLi, Yan. "An integrated water quality monitoring system with dynamic remote sensing feedback /". Online version of thesis, 2007. http://hdl.handle.net/1850/5834.
Texto completoPowers, Craig W. "Monitoring the Transport of Microorganisms in Aquatic Environments Using Unmanned Surface Vehicles". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/81961.
Texto completoPh. D.
Panjwani, S. (Suresh). "Drinking water quality and environmental monitoring in rural areas of district Malir Karachi". Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201805312006.
Texto completoFelexce, Fru Ngwa. "Development and field evaluation of molecular techniques for monitoring toxigenic cyanobacteria in water". Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119492.
Texto completoL'occurrence très fréquente d'efflorescences en eau douce constitue une importante menace à la santé humaine et environnementale. Les microcystines sont les cyanotoxines les plus communes et la caractérisation microscopique d'efflorescences toxigènes pose souvent un défi. Ce projet de recherche vise à développer et évaluer des approches axées sur l'amplification en chaîne par polymérase (ACP) pour améliorer le suivi des cyanobactéries toxigènes dans les lacs d'eau douce du Canada. Des études préliminaires évaluant l'utilité, dans la détection quantitative par ACP (qACP) de souches de Microcystis actives ou inactives en production de microcystine, d'une série de gènes codant pour les sous-unités de la microcystine synthétase (mcy), démontra que les tests visant l'identification d'une portion des gènes mcyA, mcyE, ou mcyG permit l'estimation de la quantité de souches de Microcystis toxigènes dans des échantillons d'eau de la Baie Missisquoi, Québec. Les équivalents en cellules de Microcystis toxigènes pour les gènes mcyA, mcyE, ou mcyG furent fortement associés (p<0.05; R2>0.90) au compte total de Microcystis obtenu par microscopie. De plus, les trois tests réussirent à quantifier les cellules de Microcystis ayant le potentiel d'être toxigènes dans des échantillons ayant une teneur en microcystine indétectable, laissant présager leur utilité potentielle dans un système d'alerte précoce pour les cyanobactéries toxigènes. Afin d'évaluer l'utilité des tests moléculaires élaborés pour estimer la teneur en Microcystis toxigènes, des études en laboratoire furent entreprises afin d'évaluer comment la teneur en gènes mcy et la biomasse de différents assemblages mixtes d'une espèce toxigène de Microcystis et d'une espèce non-toxigène d'Anabaena pourraient varier sous divers régimes d'azote, de phosphore, de température et de lumière. Les résultats démontrent une dépendance des taux de croissance, quotas en microcystine cellulaire et gène mcyE sur les nutriments et conditions de température et sur la présence de cyanobactéries compétitrices. Les changements dans le nombre de copies de mcyE furent souvent le reflet du taux de croissance de M. aeruginosa CPCC 299, ce qui implique un jumelage entre la production de mcyE et la croissance cellulaire.L'étude développa et adopta une approche qACP multiplexe pour la quantification simultanée des génotypes d'Anabaena, Microcystis, et Planktothrix produisant de la microcystine dans la Baie Missisquoi. En laboratoire, le test multiplex s'avéra très sensible et spécifique aux souches d'Anabaena, Microcystis, et Planktothrix portant le gène mcyE. Les valeurs de R2 pour la courbe d'étalonnage excédèrent 0.99, et les efficacités de réaction excédèrent 90%. L'analyse des échantillons souligna que Microcystis spp. était le principal présumé producteur de microcystine durant les périodes d'échantillonnage de 2010 et 2011. Enfin, les tests qACP développés servirent à l'étude de l'expression génique de mcyE dans Microcystis et Planktothrix, en parallèle au changement du nombre de copies de mcyE, la biomasse cyanobactérienne et les concentrations en microcystine, afin d'en dériver un indicateur fiable du risque associé à la microcystine. Les produits de transcription de mcyE furent généralement moins élevés dans les cultures mixtes (vs. monocultures), ce qui s'accorde avec la diminution du taux de croissance en cultures mixtes. Lorsque, en cultures maintenues en laboratoire, les concentrations en copies du gène mcyE, le nombre de cellules, et la teneur en chlorophylle a étaient significativement corrélés (p<0.01) avec la teneur en microcystine, le niveau de transcriptions du gène mcyE s'avéra faiblement corrélé au niveau de microcystine. Dans les échantillons, le nombre de copies de mcyE montra une forte association à la teneur en microcystine, suggérant que le nombre de copies de mcyE pourrait être un meilleur indicateur du risque de contamination en microcystine.
Teas, Sebastian E. "A Design for Low-Cost Nutrient Runoff Monitoring Technology". Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493218785022913.
Texto completoTezce, Gozde. "Drinking Water Quality In Ankara: A Monitoring Study". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612749/index.pdf.
Texto completozde MS, Department of Environmental Engineering Supervisor: Prof. Dr. Ü
lkü
Yetis Co-Supervisor: Prof. Dr. Filiz B. Dilek December 2010, 124 pages Following the event of severe drought experienced in 2007, it was decided to use Kesikkö
prü
Reservoir as an additional source of water supply for the city of Ankara. Thereupon, there have been debates on the quality of Kesikkö
prü
Reservoir water with the claims that some parameters, primarily sulfate and arsenic, were not complying with the quality standards and therefore there was a threat to public health. This study aims to determine whether the water quality in the distribution network in Ankara exceeds water quality standards, and to assess the status of water quality of Ankara. To this end, monthly samples were collected from 24 districts as distribution network water and also from the Kesikkö
prü
Reservoir as source water, and were monitored in terms of certain water quality parameters during the period of July 2008 through June 2009. Sulfate concentration in Kesikkö
prü
Reservoir water was measured as 300-500 mg/l and this high sulfate concentration in the source water led to high sulfate values in distribution system. On the other hand, the arsenic concentration in Kesikkö
prü
water was analyzed between 9-11 µ
g/l which is lower than the expected high arsenic concentration in Kizilirmak water. Moreover, monitoring of THM and HAA in distribution network was carried out to follow DBPs formation. The highest THM concentration was observed as 109 µ
g/l for Bilkent in July 2008. Although for some districts and some months throughout the year THM concentration was higher than the EPA Stage-I (80 µ
g/l) and Stage-II (40 µ
g/l) limits, mean annual THM concentrations for districts in distribution system satisfies the standards. Furthermore, the highest HAA5 concentrations were determined as 75 µ
g/l for Dikmen in February 2009. However, annual average HAA5 in any of the districts did not exceed USEPA limit of 60 µ
g/l. Nonetheless, total/fecal coliform bacteria, which are the indicators of microbiological contamination, were detected in distribution system between the months of July 2008 and January 2009. However, the coliform bacteria did not appear with the increasing residual chlorine in the distribution system since January 2009. Results from this study demonstrate a temporal variability in water quality
indicating water quality deterioration in the distribution system during some months, while almost full compliance with the water quality standards during other months. Overall
due to Kesikkö
prü
raw water, sulfate content appears to be the major concern in the water quality when considered the one-year monitoring period.
Karlsson, Lovisa. "Water Courses in Kvarntorp : An Evaluation of Water Chemistry from Monitoring Data 1994-2012". Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-36474.
Texto completoHollabaugh, Eric M. "Field performance of instrumentation for monitoring effects of timber harvesting on water quality". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4541.
Texto completoThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 23, 2007) Includes bibliographical references.
Khanolkar, Mameet (Mameet P. ). 1976. "Investigating the J2EE software architecture for infrastructure monitoring : a water metering case study". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84261.
Texto completoKlug, Katherine E. y Katherine E. Klug. "Novel Portable Sensors and Techniques for Improving On-Site Water Quality and Environmental Monitoring". Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626354.
Texto completoLongsmith, Rebecca Johnson. "A BIOLOGICAL MONITORING INTERNSHIP WITH THE OHIO ENVIRONMENTAL PROTECTION AGENCY, DIVISION OF SURFACE WATER". Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1451932666.
Texto completoFloresquerra, S. M., D. R. Dulaney, Kurt J. Maier y Phillip R. Scheuerman. "Monitoring of Selected Bacteriological and Water Quality Parameters Associated with the Sinking Creek TMDL". Digital Commons @ East Tennessee State University, 2002. https://dc.etsu.edu/etsu-works/2929.
Texto completoO'Quinn, Terry Shannon. "Development of a Reservoir Embayment Characterization Process to Prioritize Water Quality Improvement". Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etd/1895.
Texto completoDefenbaugh, Angela Lynn. "Evaluating Ohio River Basin Waters: A Water Quality and Water Resources Internship with the Ohio River Valley Water Sanitation Commission". Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1389295851.
Texto completoChang, Lydia y 張麗迪. "Transport of dinoflagellate cysts through ballast water and its implications for marine water monitoring in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31252795.
Texto completoChang, Lydia. "Transport of dinoflagellate cysts through ballast water and its implications for marine water monitoring in Hong Kong /". [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13813481.
Texto completoBrake, Jeffrey Scott. "Locating Optimal Water Quality Monitoring Locations Using Demand Coverage Index Method". DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1421.
Texto completoJansson, Victoria. "Monitoring heavy metals in private drinking water near industrial activity in Kosovo". Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37570.
Texto completoKaiser, Rachel Anne. "An Urban Karst Aquifer Resource Evaluation and Monitoring Toolbox". TopSCHOLAR®, 2019. https://digitalcommons.wku.edu/theses/3142.
Texto completoSteele, Kelsi Lynne. "Atrazine best management practices : impact on water quality". Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/660.
Texto completoTorres, Eric Steven. "Chemical characterization of Lake Gregory". CSUSB ScholarWorks, 2011. https://scholarworks.lib.csusb.edu/etd-project/136.
Texto completoStevenson, Matthew M. "Monitoring effective use of household water treatment and safe storage technologies in Ethiopia and Ghana". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/47783.
Texto completoIncludes bibliographical references (p. 117-125).
Household water treatment and storage (HWTS) technologies dissemination is beginning to scale-up to reach the almost 900 million people without access to an improved water supply (WHO/UNICEF/JMP, 2008). Without well-informed and effective use as intended, these promising technologies will not be deployed to maximum advantage. Successful scale-up thus requires monitoring and evaluation (M&E) of behavioral indicators to achieve safe water and improved health. This thesis offers a consistent framework for the operational monitoring of Effective Use of a set of eight HWTS technologies including dilute bleach solution, Aquatabs, solar disinfection (SODIS), cloth filters, the ceramic pot filter, the biosand filter, PUR and associated safe storage practices. During late 2007, key members of the WHO-hosted International Network to Promote Household Water Treatment and Safe Storage ("The Network") who are involved with M&E of HWTS systems were contacted. A literature search on monitoring efforts involving the eight HWTS followed. The author traveled to Ethiopia and Ghana during January 2008 to investigate multiple HWTS implementations and field-test preliminary monitoring methods as part of that process. Interviews were conducted with HWTS Network partners and the users of their HWTS products, household water quality testing was conducted, and documents on usage and monitoring were collected and compiled. A framework for operational monitoring of Effective Use behaviors at the household was developed through these efforts. The framework consists of a set of Monitoring Observations specific to each technology, comprised of the five categories of Treatment, Safe Storage, Maintenance, Replacement Period, and Physical Inspection, as well as a set of common Water Quality Monitoring paramaeters.
(cont.) Field methods for measuring turbidity, residual free available chlorine, and E.coli as an indicator of microbiological water quality are described that require minimal training, time, and equipment and that are cost-effective (US $3.60 for a complete set of household tests).
by Matthew M. Stevenson.
M.Eng.
Lu, Connie C. "Monitoring and evaluation of a ceramic water filter and hand-washing intervention in Northern Ghana". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74407.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 120-124).
Through a Rotary Club contract, PHW will sell Kosim filters and install Tippy-Tap hand-washing stations in 1250 households in Northern Ghana. This thesis presents the following project monitoring and evaluation components: (1) three-part evaluation framework; (2) baseline results; and (3) recommendations for an objective measure of Kosim filter use. The evaluation framework consists of a baseline survey, one-month follow-up survey, and six-month follow-up survey, and includes a staggered cross-sectional study that compares health outcome between purchasers and non-purchasers, and between purchasers from exposure households and purchasers from control households. January 2012 baseline surveys collected information on household characteristics, water source, household water management, hand-washing practices, diarrheal disease prevalence, and respiratory disease prevalence. In total 429 households were sampled from 20 villages, and the results from 10 villages are reported in this thesis. Overall, 98.6% of the survey population uses surface water as a primary dry season drinking water source, and 79.9% uses unprotected water sources in the wet season. An estimated 52.6% of households use cloth filters to treat their drinking water at home. Only 5.0% of households practice hand-washing with soap, yet 99.2% of households have soap present in the home. The prevalence rate for diarrhea was 23% (95% CI 17% to 29%) for children under the age of five and 9% (95% CI 5% to 13%) for the general population. For cough and difficulty breathing, prevalence rates were 25% (95% CI 19% to 31%) for children under the age of five and 13% (95% CI 8% to 17%) for the general population. Regarding an objective measure of Kosim filter use, the Camelbak@ Flow MeterTM accurately measures flow of at least 0.8 L/min, and is therefore sufficient to measure most flow rates through the spigot of the Kosim filter. PHW should choose one of three options obtain an objective measure of Kosim filter use: (1) adapt and develop a method to retrieve data from the Camelbak@ Flow MeterTM; (2) adopt the SWEETSenseTM monitoring and data retrieval system, or (3) develop a method to measure and retrieve data on total time that the spigot is in the "open" position.
by Connie C. Lu.
M.Eng.
Peacock, Steven. "Storm Water System Monitoring for the Small Municipality Under Phase II of the National Pollutant Discharge Elimination System". Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4298/.
Texto completo