Dissertations / Theses on the topic 'Index of Stream Condition'
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Hilton, Gene T. "A seasonality study of the West Virginia stream condition index." Huntington, WV : [Marshall University Libraries], 2004. http://www.marshall.edu/etd/descript.asp?ref=494.
Full textElias, Carmen Lopes. "Effect of global changes and spatial scale on diatom communities of temperate rivers: dealing with implications in bioassessment." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/22393.
Full textDiatoms are generally the most frequent and abundant algae in streams and are known by their responsiveness to changes in the environmental conditions of streams. Diatoms are frequently the only biological quality element representative of the aquatic flora in small streams. As a result, diatoms are nowadays a mandatory biological element in the evaluation of the ecological quality of European rivers, according to the Water Framework Directive. Nevertheless, there is still a relative lack of knowledge of key effects of global changes and spatial scale on diatoms. To bridge this gap, this work aims to study the effect of relevant global changes as well as spatial scale on diatom communities of temperate rivers and to deal with its implications in bioassessment. The relevant global changes were assessed in streams from the central Portuguese littoral region which is highly populated and suffers from high anthropogenic impacts. The effect of spatial scale on diatom communities was investigated by a laboratorial experiment (mesocosm experiment) and by using diatom data from temperate regions of the United States of America and Australia. In order to achieve the main aim, three global questions were raised: (1) How to deal with the historical anthropogenic influences in the bioassessment?; (2) Are extreme events due to climatic changes reflected in diatom communities? A comparison with macroinvertebrate communities; (3) How are diatom communities influenced at the spatial scale (small-scale: habitats; large-scale: inter-continental). A strong anthropogenic influence on the streams and rivers of the Portuguese littoral region was confirmed as well as the lack of true reference sites. Sites in the Least Disturbed Condition (LDC) had considerable high nutrient concentrations. As the strong anthropogenic pressures (e.g., alteration of the riparian vegetation, morphological condition and sediment load) prevented an adequate definition of reference conditions for streams in this area an alternative procedure to define suitable reference conditions was investigated, consisting of a combination of modelling and filter approach. This procedure is suitable to deal with the implications of global changes on diatom and on macroinvertebrate communities. The communities observed in the different streams were less homogeneous than those predicted for the same streams under reference conditions (i.e., through the filter approach), as would be expected in sites having variable levels of anthropogenic change. Along with the development of this new approach a new multimetric diatom index was developed. This index produced strong correlations with the selected pressures, providing a more comprehensive assessment of biological quality than the Indice de Polluosensibilité Spécifique (IPS) officially adopted for Portugal. To answer the second global question a smaller set of streams were used within the Portuguese littoral region that were affected by an unusual drought event that lead to the complete drying of the stream channels. Diatoms, as well as macroinvertebrates, were affected by the drought event considering trait proportions, community’s composition and bioassessment classifications. However, the diatom communities had a faster recovery response than macroinvertebrates. The type of substrate – hard and soft –representing the small spatial scale affected diatom communities by changing its composition and trait proportions but not water quality classification in a mesocosm experiment. However, the differences found in the epipsammic and epilithic diatom communities in the streams that were used to answer the first global question were more evident than those found in the mesocosm experiment. In fact, with the mesocosm results, and under the same physical and chemical conditions the IPS differences between substrates disappeared contrasting with the differences that were found in the streams. Additionally, the diatom communities were different between continents with the same type of climate, suggesting that diatom communities are also influenced at the large-scale (even at the order level). Therefore, constraints other than climate are likely to have contributed to the inter-continental differences in diatom community composition found at all taxonomical levels (e.g., geology, historical biogeographic processes and hydrology). On the whole, the results obtained during this study bring new information and new approaches to deal with the bioassessment. However, some more work must be done in order to investigate e.g., based in the global warming predictions, the effects of the temperature increase, on the water quality assessment based on diatom communities.
As diatomáceas são as algas que se encontram mais frequentemente e em maior abundância em cursos de água doce. São conhecidas pela capacidade dos diferentes taxa responderem a variações das condições ambientais dos rios e por serem frequentemente o único elemento de qualidade biológica representativo da flora aquática em pequenos rios e ribeiras. Em consequência destas características, e de acordo com a Directiva Quadro da Água, as diatomáceas são presentemente um dos elementos biológicos obrigatórios na avaliação da qualidade ecológica dos rios europeus. No entanto, ainda existe algum desconhecimento acerca dos efeitos das alterações globais e da escala espacial nas diatomáceas. Para colmatar esta lacuna, o presente trabalho tem como objetivo estudar o efeito de alterações globais relevantes e da escala espacial nas comunidades de diatomáceas de rios temperados assim como estudar a melhor forma de lidar com as suas implicações na biomonitorização. O efeito das alterações globais foi estudado em rios e ribeiras da região centro litoral de Portugal continental dado tratar-se de uma região densamente povoada e sujeita a impactos antropogénicos significativos. O efeito da escala espacial nas comunidades de diatomáceas foi investigado através de uma experiência laboratorial (mesocosmos) e também com recurso a informação estatística de comunidades de diatomáceas de várias regiões temperadas, incluindo as costas ocidentais dos Estados Unidos da América e da Austrália. De modo atingir o objetivo principal deste trabalho, três questões globais foram colocadas: (1) Como lidar com as influências antrópicas históricas na biomonitorização?; (2) Será que as comunidades de diatomáceas reflectem os eventos extremos causados pelas alterações climáticas? Uma comparação com as comunidades de macroinvertebrados; (3) Como são as comunidades de diatomáceas influenciadas pela escala espacial (pequena escala: habitats; grande escala: inter-continental). Verificou-se uma influência antropogénica considerável nos rios e ribeiras da região centro litoral de Portugal continental assim como a inexistência de verdadeiros locais de referência. Mesmo os locais considerados como estando em condições de menor perturbação apresentaram concentrações de nutrientes consideravelmente elevadas na água. Uma vez que as fortes pressões antropogénica (p.e., alteração da vegetação ripária, condição morfológica e carga de sedimentos) não permitiram o estabelecimento de condições de referência adequadas para os rios desta região, foi proposto um procedimento alternativo baseado numa combinação de dois métodos – modelação e filtros ambientais. A aplicação deste procedimento na definição de condições de referência revelou-se útil para lidar com os efeitos das alterações globais na biomonitorização com recurso a comunidades de diatomáceas e macroinvertebrados. De facto, como seria de esperar, as comunidades observadas em rios sujeitos a alterações antropogénicas revelaram-se menos homogéneas do que as previstas em condições de referência para esses mesmos rios, i.e., através da aplicação dos referidos filtros ambientais. Em conjunto com o desenvolvimento deste novo procedimento, foi também proposto um novo índice multimétrico de diatomáceas. Este novo índice revelou-se fortemente correlacionado com as pressões selecionadas, fornecendo uma avaliação da qualidade biológica mais abrangente do que o índice oficial adotado por Portugal, o Indice de Polluosensibilité spécifique (IPS). Para responder à segunda questão global apenas um subconjunto de ribeiras da região litoral de Portugal foi selecionado, o qual engloba as ribeiras cujos leitos secaram durante uma vaga de calor invulgar que ocorreu em Portugal em 2011/2012. Verificou-se que, de facto, quer as comunidades de diatomáceas quer de macroinvertebrados foram afetadas pelo evento de seca extrema tendo-se observado alterações ao nível das proporções de traits, composição e a classificação da qualidade biológica. No entanto, as diatomáceas apresentaram uma recuperação significativamente mais rápida que os macroinvertebrados. Os tipos de substratos usados na experiência de mesocosmos realizada neste trabalho (duro vs. macio; pequena escala espacial) também mostraram afetar as comunidades de diatomáceas, uma vez que houve diferenças quer na sua composição quer nas proporções de traits. Esta resposta ao tipo de substrato foi mais evidente em condições físico-químicas controladas do que aquela sugerida pelas diferenças entre as comunidades epipsâmicas e epilíticas dos rios monitorizados neste trabalho. Não obstante, durante a experiência de mesocosmos verificou-se que ao nível de IPS as diferenças entre substratos não eram relevantes quando comparadas com as que se haviam verificado nos rios. As diferenças observadas entre as comunidades de diatomáceas dos vários continentes (Europa, América e Austrália) sugerem que variações ao nível da grande escala também ocasionam diferenças nas comunidades, apesar de influenciados pelo mesmo tipo de clima. Isto sugere que outros factores para além do clima (p.e., geologia, processos biogeográficos históricos e hidrologia) podem ter contribuído para as diferenças inter-continentais verificadas ao nível da composição das comunidades de diatomáceas, a todos os níveis taxonómicos estudados. De um modo geral, os resultados obtidos durante este estudo trazem novas informações e novas abordagens para lidar com a biomonitorização. No entanto, mais trabalho será necessário a fim de investigar, por exemplo, os efeitos do aumento da temperatura previstos devido ao aquecimento global na avaliação da qualidade da água com base em comunidades de diatomáceas.
Ffolliott, Peter F. "Snowpack Density: An Index of Snowpack Condition." Arizona-Nevada Academy of Science, 1985. http://hdl.handle.net/10150/296382.
Full textJohnson, Laura Young. "Evaluation of Bureau of Land Management Protocols for Monitoring Stream Condition." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/45202.
Full textMaster of Science
He, Jianhao. "The development of structure-based tidal stream turbine condition monitoring systems." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/111196/.
Full textSellens, Claire, and n/a. "The Reference Condition Approach in Disturbed Landscapes: Accounting for Natural Disturbance and a Reference Condition defined by Good Management Practices for River Protection." University of Canberra. School of Resource, Environmental and Heritage Sciences, 2007. http://erl.canberra.edu.au./public/adt-AUC20081029.131335.
Full textFloro, Christopher V. O. "Development of predictive equations based on Pavement Condition Index data." Thesis, Seattle, Washington : University of Washington, 1992. http://handle.dtic.mil/100.2/ADA250625.
Full textMissing pages A3, A7, A8, A10-A26, A28-A45. "March 1992." Description based on title screen as viewed on April 7, 2009. Includes bibliographical references. Also available in print.
Zweig, Christa L. "Body condition index analysis for the American alligator (Alligator mississippiensis)." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000836.
Full textPoirier, Schmitz Alfredo. "Invariant Measures and a Weak Shadowing Condition." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/95172.
Full textRevisamos el concepto de medida invariante y estudiamos condiciones bajo las cuales combinaciones lineales de promedios a lo largo de órbitas periódicas son densas en el espacio de medidas invariantes.
Allmark, Matthew James. "Condition monitoring and fault diagnosis of tidal stream turbines subjected to rotor imbalance faults." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/98633/.
Full textHorch, Alexander. "Condition Monitoring of Control Loops." Doctoral thesis, Stockholm : Tekniska högsk, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3050.
Full textGarriques, Daren. "Seasonal patterns of gonadal development and condition index of Dendostrea sandvicensis." Thesis, University of Hawai'i at Hilo, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1550183.
Full textVery little information is available on the Hawaiian Oyster Dendostrea sandvicensis in regards to its biology and physiology. Efforts were made to better understand the active reproductive season of this oyster by studying the population located in He'eia fish pond in Kaneohe Bay, O`ahu. This study focused on the condition index (CI) and gonadal developmental stage trends, measured from monthly oyster tissue samples from January to December 2009. The relationship between CI and temperature was examined. Results suggest CI is not related to temperature. Further analysis defined a positive correlation for CI and temperature during summer but not in winter. Ranges in CI values were higher in summer than in winter. D. sandvicensis experience a tropical reproductive cycle, as trends related to the gonadal stage indicate. January to March is dominated by maturing gonads. From April to October there is a rise and then steady decline of empty gonads indicating an active reproduction season. From November to December a rise in mature gonads indicate readiness for reproduction and recovery. Empty gonads are present through out the year indicating reproduction happens throughout the year, and peaks in beginning of summer.
Lawson, Laurie Linwood. "Epilithic diatoms as indicators of stream condition in arid lotic ecosystems of the american southwest." Diss., The University of Arizona, 1999. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1999_093_sip1_w.pdf&type=application/pdf.
Full textKozlowski, Donald F. "Pre-fire functional condition and post-fire channel changes in northern Nevada streams 1999-2001 fires /." 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:1447637.
Full textShepard, Gerald T. "Determination of a true biotic index and comparison of riffle and snag habitats in Bearskin Creek, Oneida County Wisconsin, using a modified biotic index /." Link to abstract, 2002. http://epapers.uwsp.edu/abstracts/2002/shepard.pdf.
Full textSimkins, Richard M. "Response to Drought of a Stream Fish Assemblage in a High Elevation Stream in the Intermountain West." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6901.
Full textLadson, Anthony Richard. "A multi-component indicator of stream condition for waterway managers : balancing scientific rigour with the need for utility /." Connect to thesis, 2000. http://eprints.unimelb.edu.au/archive/00000296.
Full textRavirajan, Karthik. "Development and application of a stream flashiness index based on imperviousness and climate using GIS." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7247.
Full textThesis research directed by: Dept. of Civil and Environmental Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Ganesh, Srinivasan. "Investigation of the utility of the vegetation condition index (VCI) as an indicator of drought." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2517.
Full textSo, Bing Kwan. "Pseudo-differential operators, heat calculus and index theory of groupoids satisfying the Lauter-Nistor condition." Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/3793/.
Full textRobles, Moreno Carmen del Pilar. "On Tax Domicile in Tax Matters and the Condition of Not Been and Not Found." Derecho & Sociedad, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/119142.
Full textExisten muchos tipos de domicilios en la esfera privada de una persona, teniendo diferentes efectos y tratamientos legales. En ese sentido, el presente artículo analizaremos el concepto de domicilio fiscal. Para ello, primero se introducirá el concepto de domicilio, centrándonos luego en el domicilio fiscal, para finalmente ver el tratamiento del domicilio en el Código Tributario. Para finalizar, se analizará el caso del Domicilio No Hallado y No Habido, así como las consecuencias tributarias de cada uno.
Rossano, Eriko Morishita. "Definition and measurement of stream health in Japan based on index of biological integrity (IBI) concepts /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5401.
Full textMohagheghi, Ali. "Effect of Pavement Condition on Traffic Crash Frequency and Severity in Virginia." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/100129.
Full textMaster of Science
Many factors cause crashes in the roads. Although there is a common sense that road characteristics such as asphalt quality are important in terms of road safety, there are few studies that scientifically prove that statement. In addition, asphalt maintenance decisions making process is mainly based on cost benefit optimization, and traffic safety is not considered at the process. The purpose of this study is to analyze crashes and road characteristics related to each crash to understand the effect of those characteristics on crash frequency, and eventually, to build a model to predict the number of crashes at each part of the road. The model can help transportation agencies to have a better understanding in terms of safety consequences of their infrastructure management plans. The scope of this study is the highway interstate system in Northern Virginia. Results suggest that pavement condition has a significant impact on crash frequency.
Smogor, Roy A. "Developing an index of biotic integrity (IBI) for warmwater wadeable streams in Virginia." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11012008-063525/.
Full textZhu, Yufeng. "Assessing Condition on Alkali-Silica Reaction (ASR) Affected Recycled Concrete." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41191.
Full textCopeland, Timothy. "An Evaluation of Relative Weight as an Indicator of Body Composition and Nutritional Status in Wild Fish." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29993.
Full textPh. D.
Fogelson, Susan B. "Effects of anoxia of histology, bacteriology, condition index, glycogen levels, and fecundity in the Eastern oyster Crassostrea virginica." Auburn, Ala, 2007. http://repo.lib.auburn.edu/2007%20Spring%20Theses/fogelson_susan_26.pdf.
Full textCaravedo, Joan. "Truth and Liberty in Kierkegaard." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/119566.
Full textEl texto propone una aproximación introductoria a la relación entre libertad y verdad. Para lograr esto seguirá una ruta, amparada fundamentalmente en el texto de Kierkegaard Migajas filosóficas, que comenzará con el problema socrático en torno a la adquisición de la verdad, pasando a considerar la dación de la verdad fruto del amor gratuito de Dios, desde el cual habrá de emerger el tema de la libertad que, por último, terminará por conducirnos a la explicación kierkegaardiana del devenir y, específicamente, al tema de la relación entre posibilidad y realidad. En esta exposición, el concepto que procurará articular todo nuestro recorrido será el de instante, entendiendo este como punto de confluencia entre lo eterno y lo temporal y resaltando la paradoja aquí implicada.
Burkett, Jason Lee. "BENCHMARK STUDIES FOR STRUCTURAL HEALTH MONITORING USING ANALYTICAL AND EXPERIMENTAL MODELS." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2660.
Full textM.S.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering
Verhoeven, Jack George. "Framework for Rating Roadway Assets at the Corridor Level." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/34007.
Full textThe current practice in the United States has shown a lack of consistency in the way assets are rated in each state. Individual states have employed their own methodology for rating each asset type. This makes comparison of assets between states difficult. Several methods in use have provided a way to effectively rate an asset, but no method exists that can be used to compare ratings in different states.
To successfully maintain the network of roads across the United States, a method to assess assets between states is necessary. Consistency between states in their data collection, rating calculation, and rating reporting are all necessary to identify poor sections of roadway. Another useful reporting item will be a condition rating of all the assets contained within a corridor. A corridor is a series of travel routes which move people between two major points of interest.
By analyzing corridor level condition ratings, it will be possible to examine the overall condition of all the corridor sections across the nation and identify sections that need assistance in raising their condition.
The objective of this thesis was to develop a framework for rating assets at the corridor level. The framework was developed to be applied to any asset contained within a roadway and allow the combination of individual asset ratings into a single corridor rating. The final methodology not only reports the overall corridor condition, but the functional and structural health of each individual asset, the rating of all of an asset type within a corridor, and performance indicators for individual items on a single asset.
The methodology was tested using data provided by the Virginia Department of Transportation (VDOT) to test if the methodology would produce ratings similar to those in use. For the application methods were developed for two major roadway assets; pavements and bridges.
The product of this thesis is a general framework which can be applied to roadway corridors to assess the overall condition of all the assets contained within the corridorâ s boundaries. It can be used in conjunction with an IMS to help improve and maintain the overall condition of the roads, which are critical to the United States. Without unification of condition rating methods into a single method it will never be possible to compare assets from every state in the nation.
Master of Science
Valdez, Zamudio Diego. "Application of Computer Modeling in Buffelgrass Pastures Studies." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195018.
Full textPersson, Martin. "Changes in condition of herring (Clupea harengus) in Swedish coastal waters." Thesis, Södertörns högskola, Institutionen för livsvetenskaper, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3376.
Full textBingham, Joel D. "Metric Selection to Establish a Condition Gradient Between Natural and Impaired Northeast Ohio Headwater Stream Systems as a Basis for Evaluation of Restoration Performance." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1431069188.
Full textCjuro, Vera Cinthia Mirella. "The Compliance with the Resolutory Condition as a Causal Valid of Extinction in the Work Contracts with an Indefinite Term: Temporary Indefinite Contracts?" Derecho & Sociedad, 2016. http://repositorio.pucp.edu.pe/index/handle/123456789/117284.
Full textEn el presente artículo, la autora analiza si a la luz de las normas laborales que regulan las causales de extinción de los contratos de trabajo, es posible que las partes puedan incorporar válidamente una condición resolutoria en contratos a plazo indeterminado. Para ello, comenta un caso particular peruano, así como algunos pronunciamientos del Tribunal Supremo español.
Drougas, Ioannis. "Rate allocation in distributed stream processing systems." Diss., [Riverside, Calif.] : University of California, Riverside, 2008. http://proquest.umi.com/pqdweb?index=0&did=1663077971&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268240766&clientId=48051.
Full textIncludes abstract. Title from first page of PDF file (viewed March 10, 2010). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 93-98). Also issued in print.
Sjöberg, Oskar. "The Origin of Streams : Stream cartography in Swiss pre alpine headwater." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-277377.
Full textSchulze, Bert-Wolfgang, Boris Sternin, and Anton Savin. "The homotopy classification and the index of boundary value problems for general elliptic operators." Universität Potsdam, 1999. http://opus.kobv.de/ubp/volltexte/2008/2556/.
Full textStewart, Helena K. "Peat's secret archive : interpreting the geochemical and palaeodust record from Scottish peat as a potential index of North Atlantic storminess and Holocene climate change." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/24811.
Full textEhsan, Ghaffari. "Conditioning the Supply Chain in a Fast Moving Consumer Goods Business : Using value stream mapping to visualise, condition, manage information and product flow in Oriflame." Thesis, KTH, Industriell produktion, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50390.
Full textMosley, David Glen. "The Hierarchical Condition Category Model - an Improved Comorbidity Adjustment Tool for Predicting Mortality in Medicare Populations?" Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/311559.
Full textLindovská, Kristýna. "Optimalizace procesů ve společnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2016. http://www.nusl.cz/ntk/nusl-254253.
Full textMorse, Cody. "Quantifying the Environmental Performance of a Stream Habitat Improvement Project." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1972.
Full textZhang, Chi. "A Comparison among Three Bridge Performance Measures for Allocating Funds." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525735529560811.
Full textRogers, Mark Richard. "The Assessment of Stream Discharge Models for an Environmental Monitoring Site on the Virginia Tech Campus." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31123.
Full textMaster of Science
Oates, Mark. "Observations of Gonad Structure and Gametogenic Timing in a Recovering Population of Ostrea lurida (Carpenter 1864)." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/13329.
Full textBlackmore, Paul David. "Degradation of polymeric outdoor high voltage insulation : surface discharge phenomena and condition assessment techniques." Thesis, Queensland University of Technology, 1997.
Find full textZhuang, Yuchen. "Risk, return and market condition: a new functional-beta capital asset pricing model." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/78.
Full textWong, Mu-Han, and 翁慕涵. "Feasibility of Applying Index of Stream Condition (ISC) on Torrents in Taiwan." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/13958379004831208076.
Full text國立臺灣大學
生物環境系統工程學研究所
97
There are many kinds of assessments on ecological habitat of stream due to the different regions and localities. This study targeted at torrents, which have less contamination and more ecological potential restoration comparing with downstream ones and chose Index of Stream Condition, developed by the State of Victoria in Austria, which is included in physical, chemical and botanical indexes and easier use for engineers, especially. In which, The Aquatic Life Sub-index is modified by this study and is represented by fish species. By Stepwise Regression Analysis in Multiple Regression Analysis, the prominent habitat factors could be depth, area, volume , substrate diversity, pH , electrical conductivity and elevation as well as the relationship between these factors and fish length and its density. The result of statistic analysis showed that the relation between these prominent factors and the variety of body length and density of endemic fish species are significant. According to this result, the assessment of Aquatic Life Sub-index was modified for torrents in Taiwan. Ten torrents in Taiwan were assessed by the modified method, and the results were compared with Tsai’s one (2006). The comparison showed that the modified method by this study reflect the better result than Tsai’s one. And, the modified method can avoid rejecting the ecological conditions of torrents totally as no finding endemic fish species. Moreover, the investigation time and its frequency could be setup in each season in March, June, September and December. Besides, the criteria of Index of Stream Condition on torrents in Taiwan could be 31. In which, the index below 31 represents the worse habitat for endemic fish species while above 31 represents a better condition.
ming, Chou Cheng, and 周正明. "The evaluation process of ecological engineering method by index of stream condition." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/04224097453905435885.
Full text國立臺灣大學
土木工程學研究所
90
Department of Nature Resources and Environment (Australia) publish the Index of Stream Condition in the 1997 and the second published in 1999. The ISC is used in the filed management. I use it to be a way to evaluation on the ecological engineering process. The indexes will trans into the way to decide which place is suite, how to concept in the site and how to check the engineering. This study provides a process but not guide line. The Index of Stream Condition include five parts: Hydrology、Physical from、Streamside Zone、Water quality and Aquatic life. These indexes include many specialties such civil engineering, hydrology engineering, environment engineering and biological. We use Da-Kao stream to be a case to proof the hypothesis. The conclusions are: 1. Establish a process to evaluation ecological engineering. 2. We use this indexes to make a process in plan, design, construction and maintain. 3. The land use often cause to the low scores. If we want to make the ecological engineering successful, we have to control the land use.
Tsai, Chi-Chang, and 蔡奇璋. "Examining the Suitability of Applying Index of Stream Condition(ISC) to Torrents Managed for Debris Flows." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/62143522021635186530.
Full text國立臺灣大學
生物環境系統工程學研究所
94
The purpose of this research is to assess the suitability of using Index of Stream Condition (ISC), developed by the State of Victoria in Australia, in managing debris flows at seven torrents in Taiwan. This research also provides recommendations about the establishment of local stream condition assessment models in the future. The results demonstrate that the number of Hydrology Sub-index was lower than normal. It did not mean that the stream conditions were bad, since natural topographies and climates did have an impact on it. Thus, standards for grading are modified to better reflect local conditions. This research also shows that it is not appropriate to utilize the impact of artificial barrier as an indicator in Taiwan because fish survived well even though corridors had been blocked. Therefore, the existence of fish is used in this research as the standard for assessment. It was also not able to evaluate the condition of instream physical habitat on torrents in which flow changes dramatically between rain and dry seasons, and thus this evaluation is modified according to flow conditions in rain and dry seasons. The assessment of native and non-native vegetation under the Streamside Zone Sub-index is difficult and unnecessary, thus it is not conducted in this research; the consistency and width of vegetation is assessed. Due to the actual conditions of debris flow in Taiwan, the total phosphorus and electrical conductivity are not assessed, and instead of assessing the turbidity, the amount of total suspended solids is evaluated. The research maintains the test of alkaline and acidity, and adds an assessment of water temperature. Aquatic Life Sub-index is modified to address the conditions of local endangered as well as endemic fish species.