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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
161

Prevalência de exposição aos campos eletromagnéticos e justiça ambiental no município de São Paulo / Prevalence of exposure to electromagnetic fields and environmental justice in the city of São Paulo

Mateus Habermann 22 January 2009 (has links)
O trabalho discutiu a crescente problemática do risco em nosso atual paradigma tecnológico, sua percepção e tolerabilidade, assim como a distribuição desigual destes entre a sociedade. A hipótese fundamental que enfatiza Justiça Ambiental refere-se aos perigos e riscos desproporcionalmente ou injustamente distribuídos entre grupos sociais mais vulneráveis, geralmente pobres e minorias, acarretados pelos riscos ambientais relativos à vida moderna. A crescente preocupação com a poluição eletromagnética gerada pela transmissão e uso de energia elétrica tem mobilizado diversos setores da sociedade na busca por respostas sobre a relação da exposição a campos eletromagnéticos e riscos a saúde. Portanto, o trabalho teve o objetivo de quantificar o percentual de pessoas que residem em áreas próximas a linhas de transmissão de energia elétrica que atravessam o município de São Paulo, Brasil, e dessa forma potencialmente expostas aos campos eletromagnéticos por elas geradas. Informações sobre linhas de transmissão foram fornecidas pelas concessionárias de energia e geocodificadas usando o software de sistema de informação geográfica (SIG) Mapinfo®. Corredores com campo magnético 0.3T foram demarcados ao longo das linhas de transmissão, a largura desses variou conforme tensão da linha (em kV). Dados demográficos e socioeconômicos foram obtidos através do censo 2000 e incluídos no SIG em outra camada. Através deste levantamento, foi possível estimar o percentual da população potencialmente exposta aos campos eletromagnéticos gerados por linhas de transmissão aéreas que atravessam o município de São Paulo, em suas mais diversas características, como faixa etária, além de renda e escolaridade. Esses corredores incluíram cerca de 1,3% dos domicílios e 1,4% da população residente no município de São Paulo, sendo esta considerada exposta aos campos eletromagnéticos gerados por essas linhas. Através da análise socioeconômica, o estudo sugeriu que a população exposta aos campos eletromagnéticos possuía maior vulnerabilidade, como baixos índices de renda e escolaridade, o que chamou a atenção para fato dos campos eletromagnéticos das linhas de transmissão aéreas serem mais uma carga danosa delegada a estas populações. / The paper discussed the raising problem of risk in our current technological paradigm, their perception and tolerability, as well as their unequal distribution among the society. The fundamental assumption that emphasizes Environmental Justice refers to the hazards and risks disproportionately or unfairly distributed among the most vulnerable social groups, generally poor and minorities, generated by environmental risks relating to modern life. The raising concern about electromagnetic pollution generated by transmission and use of electric energy has mobilized various sectors of society in the search for answers about the relationship of exposure to electromagnetic fields and risks to health. Therefore, the work aimed to quantify the percentage of people living in areas bordering transmission lines that cross the city of São Paulo, Brazil, and therefore, potentially exposed to EMF generated by these lines. Information on transmission lines were provided by the utilities and geocoded using the geographic information system (GIS) software Mapinfo®. Corridors 0.3T magnetic field were demarcated around the transmission lines, the width of these lines varied with the line charge (kV). Demographic and socioeconomic data was obtained through the census 2000 and included in the GIS in another layer. Through this survey, it was possible to estimate the percentage of the population potentially exposed to electromagnetic fields generated by transmission lines that cross the city of São Paulo, in its more diverse characteristics, such as age, in addition to income and education. The corridors included approximately 1.4% of households, and 1.3% of the population of the city of São Paulo, thus considered exposed to the electromagnetic fields generated by such lines. Through socioeconomic analysis, the study has suggested that the population exposed to electromagnetic fields was most vulnerable, with low levels of income and education, were those who had higher prevalence to reside in these areas. Electromagnetic fields from power lines are another harmful burden delegated to these populations.
162

Caracterização geotécnica do subsolo da porção nordeste do município de Fortaleza (CE) com base em geoestatística / Geotechnical characterization based on geostatistics of a northeastern area on Fortaleza county, northeastern Brazil

Helano Regis da Nobrega Fonteles 10 October 2003 (has links)
O presente trabalho resulta da aplicação de técnicas geoestatística de análise da variabilidade espacial e de estimativas de dados de sondagem de simples reconhecimento com standard penetration test (SPT) objetivando a caracterização geotécnica de uma área com 44 'KM POT.2', situada na porção nordeste do município de Fortaleza (CE). A caracterização geotécnica desta área compreendeu os seguintes processos: montagem de um banco de dados geotécnicos; aplicação de algoritmos de interpolação para elaboração do modelo digital de terreno (MDT); a aplicação de técnicas geoestatísticas de cokrigagem e krigagem ordinária na elaboração do mapa de superfície freática; a construção de um modelo geológico 3D de superfície; o mapeamento de uma superfície do impenetrável ao amostrador do SPT, auxiliado por geoestatística; a modelagem geoestatística 3D dos dados do índice de resistência à penetração (N) do amostrador do SPT, o que possibilitou a estimativa em bancadas por krigagem ordinária de blocos, do referido índice em diversos níveis altimétricos do terreno. Os dados estimados das bancadas foram tratados no programa ArcView 3.1 em ambiente de sistemas de informações geográficas (SIG) na elaboração de mapas de uso sugerido de fundações, os quais derivam de uma reclassificação, com base em diversos limites de impenetrável ao SPT, dos dados estimados de N, que permitiu a identificação de áreas favoráveis ao uso de um número finito de elementos estruturais de fundação. / This work results from the application of geostatistical techniques on standard penetration test (SPT) data to the geotechnical characterisation of an area with 44 'KM POT.2' situated on the northeastern region of Fortaleza county, northeastern Brazil. The geotechnical characterization involved the following steps: the geotechnical databank development; the performance of the interpolation algorithms and application to the digital elevation model (DEM); estimation and mapping the water table level with ordinary kriging and cokriging techniques; generation of a 3D surface geological model; geostatistical mapping the SPT maximum hard penetration surface; application of 3D geostatistical modeling techniques to SPT database providing bench estimates on blocks. The SPT estimated data were inserted and reclassified on the geographical information system based on the software ESRI ArcView 3.1 in order to produce the suggested foundation maps with references to SPT penetration limits.
163

Ontology as Conceptual Schema when Modelling Historical Maps for Database Storage

Svedjemo, Gustaf January 2007 (has links)
Sweden has an enormous treasure in its vast number of large-scale historical maps from a period of 400 years made for different purposes, that we call map series. The maps are also very time and regional dependent with respect to their concepts. A large scanning project by Lantmäteriverket will make most of these maps available as raster images. In many disciplines in the humanities and social sciences, like history, human geography and archaeology, historical maps are of great importance as a source of information. They are used frequently in different studies for a variety of problems. A full and systematic analyse of this material from a database perspective has so far not been conducted. During the last decade or two, it has been more and more common to use data from historical maps in GIS-analysis. In this thesis a novel approach to model these maps is tested. The method is based on the modelling of each map series as its own ontology, thus focusing on the unique concepts of each map series. The scope of this work is a map series covering the province of Gotland produced during the period 1693-1705. These maps have extensive text descriptions concerned with different aspects of the mapped features. Via a code marking system they are attached to the maps. In this thesis a semantic analysis and an ontology over all the concepts found in the maps and text descriptions are presented. In our project we model the maps as close to the original structure as possible with a very data oriented view. Furthermore; we demonstrate how this ontology can be used as a conceptual schema for a logical E/R database schema. The Ontology is described in terms of the Protégé meta-model and the E/R schema in UML. The mapping between the two is a set of elementary rules, which are easy for a human to comprehend, but hard to automate. The E/R schema is implemented in a demonstration system. Examples of some different applications which are feasibly to perform by the system are presented. These examples go beyond the traditional use of historical maps in GIS today
164

USO DE SISTEMAS DE INFORMAÇÃO GEOGRÁFICA NO ESTUDO DE IDOSOS EM SITUAÇÃO DE RISCO. / USING GEOGRAPHIC INFORMATION SYSTEMS IN THE STUDY OF ELDERLIES IN RISK

Costa, Vera Regina Pontrémoli 17 November 2011 (has links)
This study had the main aim of identifying and analyzing the bad treatments against elderly into the urban limits of the city of Santa Maria / RS, Brazil. Strictly, it meant: placing the relation among existence, frequency, location and types of domestic violence against elderly; identifying the levels of vulnerability to bad treatment cases reported in the police in a department called Policy of the Elderly; and charting the levels of the amount of elderly in risk through geo information. In order to contribute with the process of the analyses of the bad treatments in a more dynamic way, it was used the geomatics because this area of knowledge gives priority to the multidisciplinary, motivating to perform works by using and developing the information technology. In order to reach the proposed aims, a survey in the termination services like Accident Report (AR) was done in the Police of the Elderly in terms of the years 2007/2008. After getting the information, the following categories were established: age, genre, marital status, neighborhood, victim s literacy and profession besides the type of reported aggression, relation aggressed and aggressor. Possessing that information, it was done a cadastral map placing the aggressors in the city what gives origin to the listed categories. For this, it was used the GIS and the computer program ARCVIEW 9, 3. The database is the table of Attributes for ARCVIEW 9, 3 organized by the Excel table. Each column has a field with spatial and non spatial data that were interrelated allowing visualization. In a whole, 350 chips were analyzed but 138 of them were excluded because they did not fit with the aim of the study. It was observed in the study that from those 212 chips that were investigated for bad treatments against elderly, 92 (44%) lived with the partner. According to WHO (2007), almost half of all women murdered are killed by partner or boyfriend. The majority of the elderly have basic education (63.21%), following by High School (9.43%) scoring 72.64%. Considering some years ago education was not as accessible as it is nowadays, that datum is completely justified. The female genre between 70 to 79 years old was what presented higher levels of bad treatments, scoring 63 women. Married women and widows presented the highest levels. Analyzing the type of aggression, this study verified that the physical aggression happens with more frequency, following by psychological (threats) ones and bad treats. From the 42 neighborhoods into the urban limits of the city of Santa Maria RS, it was verified that the largest concentration of bad treatments against elderly is placed in the neighborhoods: center with 22 complaints; Camobi with 17 complaints; Passo da Areia with 15 complaints. Among the aggressors, 83 were sons, 24 were daughters and 19 were victim s neighbors. Relating the indexes presented by the Police of the Elderly, it is important to clarify that they do not represent the whole amount of the bad treatments there are in our society. There are elderly who do not denounce the violence, the aggressions and the contempt situation in which they live. / Este estudo apresentou como objetivo principal identificar e analisar a prevalência de maus tratos contra idosos no perímetro urbano do município de Santa Maria/RS. Especificamente, buscou-se: espacializar a relação entre existência, frequência localização e tipos de maus tratos domésticos contra idosos; identificar os níveis de vulnerabilidade para casos de maus-tratos notificados através da Delegacia do Idoso; e mapear os níveis de concentração de idosos em situação de risco, analisando com a aplicação de geotecnologias da informação. Para contribuir com o processo de análise dos maus tratos tornando-o mais dinâmico, utilizou-se a Geomática, por ser uma área de conhecimento que prioriza a multidisciplinariedade, incentivando a realização de trabalhos através do uso e desenvolvimento da tecnologia da informação. Para atender aos objetivos propostos foi realizado um levantamento nos serviços de denúncia do tipo Boletim de Ocorrência (BO), junto a Delegacia do Idoso referente aos anos de 2007/2008. Após a obtenção dos dados foram estabelecidas as seguintes categorias: idade, sexo, estado civil, bairro, grau de instrução e profissão do agredido, além do tipo de agressão declarada, relação agredido/agressor. Com os dados referidos elaborou-se um mapa cadastral, que identificasse no ambiente urbano do município a espacialização dos agredidos, gerando assim as relações entre as categorias elencadas. Utilizou-se o SIG e programa computacional ARCVIEW 9.3. O Banco de Dados é a tabela de Atributos do aplicativo ARCVIEW 9.3, organizada com a tabela Excel. Cada coluna contém um campo com dados espaciais e não espaciais que foram relacionados entre si permitindo sua visualização. Ao todo, foram analisadas 350 fichas. Destas foram excluídos 138 fichas por não se encaixarem aos objetivos do estudo. Observou-se no estudo que das 212 fichas investigadas de notificação de maus-tratos contra o idoso, 92 (44%) viviam com o companheiro. Segundo a OMS (2007), quase metade das mulheres assassinadas são mortas pelo companheiro ou namorado. A maioria dos idosos possui Ensino Fundamental (63,21%), seguido por Ensino Médio (9,43%) totalizando 72,64%. Este dado é plenamente justificável considerando que a educação há alguns anos não era tão acessível como atualmente. O sexo feminino foi o que apresentou maior incidência de maus tratos na faixa etária de 70 a 79 anos com 63 mulheres. As mulheres casadas (52) e viúvas (67) foram as que apresentaram a maior prevalência. Analisando o tipo de agressão, verificou-se neste estudo, que a agressão física é a mais frequente, seguida de agressões psicológicas/ameaças, e maus tratos. Dos 42 bairros constantes na Divisão administrativa do perímetro urbano do município de Santa Maria RS verificou-se que a maior concentração de maus tratos contra idosos está localizada nos bairros: Centro com 22 denúncias, Camobi com 17; Passo D Areia 15 notificações. Conforme a relação com agressor quem mais agrediu foram 83 filhos, 24 filhas e 19 vizinhos. Relacionando aos números apresentados pela Delegacia do Idoso, é importante esclarecer que não significam a totalidade dos maus tratos existentes em nossa sociedade. Há ainda muitos idosos que não denunciam a situação de violência, agressões e menosprezo em que vivem.
165

Integration of multi-criteria tools in geographical information systems / Intégration d'outils multicritères dans les systèmes d'information géographique

Lidouh, Karim 13 January 2014 (has links)
For a little over twenty years, researchers have worked on integrating multi-criteria aggregation procedures (MCAP) to GIS. Several notable contributions have brought this field to what it is today. After studying the course of MCDA-GIS integration through several works, we question the future of such an attempt. Indeed most works that aim for an integration do not survive long after their direct purpose has been fulfilled. We end up understanding through a critical review of the existing systems that technical integration means nothing if it is not visible to the user on an operational level.<p><p>We therefore propose several contributions to improve the usability of MCDA methods in a geographic context. One of our works consists in adapting the PROMETHEE-GAIA methodology to be used on maps for spatially referenced problems. To do so, we define symbols/glyphs that display select parts of the results obtained through the PROMETHEE and GAIA methods. This allows for the comparison of alternatives' profiles and characteristics based on their geographic location which wasn't possible before. This adaptation helps us combine multicriteria and geographic aspects in an entirely new way.<p>We also propose some extensions of the GAIA method to improve the quality of the results and reduce the risk of wrong interpretations to be made due to losses of data. / Doctorat en Sciences de l'ingénieur / info:eu-repo/semantics/nonPublished
166

Vegetative regeneration and distribution of Fallopia japonica and Fallopia x bohemica : implications for control and management

Child, Lois Elizabeth January 1999 (has links)
Fallopiajaponica (Houtt.) Ronse Decraene (Japanese knotweed), an introduced, invasive, rhizomatous perennial plant, has become an increasing problem for nature conservation and land management in both rural and urban areas in the British Isles. In the native range of the plant, Japan, Taiwan and northern China, a number of varieties are recorded. Three congeners of F. japonica are present in the British Isles, F. sachalinensis, F. japonica var. conipacta and F. baldschuanica in addition to a hybrid F. x bohemica. An investigation by postal survey of the distribution of the hybrid F. x bohemica has identified 131 records for the British Isles. Both male and female plants of F. x bohemica have been recorded. Current understanding suggests that only female plants of F. japonica are present in the British Isles, inferring that the only means of reproduction is through vegetative regeneration. High rates of regeneration were recorded in this study for stem and rhizome material for both F. japonica and F. x bohemica in an aquatic and terrestrial environment. Implications of vegetative regeneration are discussed in terms of current management practices and future methods of control. A combination of digging with a mechanical excavator followed by spraying with the herbicide glyphosate decreased the time required to achieve an effective level of control of F. japonica compared to spraying alone. Fragmentation of the rhizome system through digging resulted in an increase in stem density allowing a more effective delivery of herbicide. Implications in terms of costs for F. japonica treatment on sites awaiting re-development are discussed. Analysis of data collated from surveys of F. japonica in Swansea using a Geographical Information System suggest that the primary habitats infested are waste ground and stream and river banks. Results suggest that disturbance, both by natural means and by human intervention has been the primary cause of spread of F. japonica in the British Isles. Management strategies are proposed which take account of these results and measures are put forward to help prevent future infestations.
167

[en] DIAGNOSIS AND MODELING OF THE PETROLEUM LOGISTIC NETWORK IN BRAZIL / [pt] DIAGNÓSTICO E MODELAGEM DA REDE DE DISTRIBUIÇÃO DE DERIVADOS DE PETRÓLEO NO BRASIL

ADRIANA COSTA SOARES 03 June 2003 (has links)
[pt] Esta dissertação apresenta um estudo sobre a Logística de Distribuição de Derivados de Petróleo, com o desenvolvimento de um modelo matemático para a determinação do custo logístico de distribuição de estoques estratégicos de combustíveis no Brasil. Este modelo não se propõe a determinar o custo ótimo de distribuição e sim estabelecer uma distribuição racional dos estoques estratégicos de combustíveis, com base na malha real de distribuição. Para o desenvolvimento do modelo, primeiramente foi realizado um diagnóstico da distribuição nacional de derivados energéticos de petróleo, mais especificamente gasolina, diesel, querosene de aviação, óleo combustível e gás liquefeito de petróleo. Para cada um desses produtos determinou-se a malha de distribuição, com os fluxos de produtos entre refinarias e terminais até as bases de combustíveis secundárias, com seus respectivos modais. Em uma segunda etapa foi construída uma base de dados georreferenciada no software TransCAD, com os dados levantados e diagnosticados anteriormente. Este sistema de informação geográfica serviu como suporte para análises logísticas e como facilitador na visualização e entendimento dos resultados. Os resultados dos custos logísticos de distribuição são mostrados por produto, para evidenciar o caráter diferenciado da distribuição de cada derivado. / [en] This master thesis presents a study about the petroleum products distribution system, with the development of a mathematical model for the determination of the logistic costs of strategic oil stocks in Brazil. This model doesn't intend to determine the minimum distribution cost , but establishes a rational distribution of the strategic oil stocks, based in the real distribution network. For the development of the model, firstly a diagnosis of the national distribution was accomplished, more specifically gasoline, diesel, aviation kerosene, combustible oil and liquefied gas of petroleum. For each one of those products, the distribution network was determined, with the flows of products among refineries and terminals until the secondary bases of fuels, with its respective transportation modals. In a second stage, a geographical database was built in the software TransCAD, with all available data . This geographical information system was a support tool for logistic analyses, visualization and better understanding of the results. The results of the total distribution costs are presented by product, to evidence the differentiated character of the distribution of each product.
168

Miljörättvisa i Stockholms län : En undersökning om samband mellan socioekonomi och miljökvalitet

Olsen, Elinor, Rydgren, Tilda January 2021 (has links)
Denna uppsats ämnar studera miljörättvisa i Stockholms län genom att undersöka om det finns skillnader inom länet gällande miljökvalitet, och huruvida det i så fall finns ett samband mellan miljökvalitetsfaktorer och socioekonomiska faktorer. En GIS-baserad metod i kombination med statistiska analyser användes för att besvara frågeställningarna. Parametrarna bullernivåer, kvävedioxid- samt partikelhalter och närhet till grön- och vattenområden studerades i relation till inkomst, sysselsättning och utbildning i korrelationsanalyser. Observationerna bestod av Stockholms läns 1287 demografiska statistikområden. Analyserna utfördes på hela länet samt kompletterades av analyser där observationerna i Stockholms innerstad exkluderades. Relativa miljökvalitetsrankingar och socioekonomiska rankingar skapades och visualiserades med kartor. Studien visar en mycket svag korrelation mellan låg socioekonomisk status och sämre miljökvalitet, ett samband som blir starkare när innerstaden exkluderas. Alla studerade socioekonomiska variabler korrelerade med avstånd till vatten, ett resultat som indikerar att avståndet till vattenområden är längre i socioekonomiskt svaga områden. Undersökningen påvisar även att socioekonomiskt svaga områden har högre bullernivåer men en större närhet till grönområden jämfört med socioekonomiskt starka områden. Exkluderandet av Stockholms innerstad påverkade sambandsstyrkan för samtliga variabler vilket indikerar att inom innerstaden är den socioekonomiska nivån generellt hög medan den miljömässiga generellt är låg. / This paper aims to study environmental justice in the Stockholm region by examining whether there are differences concerning environmental quality within the region and, if so, whether there is a correlation between the socioeconomic variables and the variables of environmental quality. A GIS-based method in combination with statistical analyses has been used to answer the research questions. Noise pollution, levels of nitrogen dioxide and particles, as well as distance to greenspace and waterbodies were studied in relation to income, employment and education in correlation analyses. The observations consisted of the 1287 demographic statistic areas in Stockholm region. The analyses were made on the entire region as well as complemented by analyses where the inner city of Stockholm had been excluded. Relative rankings of the areas based on environmental quality as well as socioeconomic standard were made and visualised with maps. The study shows a very weak correlation between lower socioeconomic standard and worse environmental quality, a correlation that strengthens when the inner city is excluded. All examined socioeconomic variables correlated positively with distance to water, indicating that the distance to water is greater in areas with lower socioeconomic standard. The study also shows that areas with lower socioeconomic standard have higher levels of noise pollution but a shorter distance to greenspace compared to areas with a higher socioeconomic standard. The exclusion of Stockholm inner city affected the correlation for all examined variables, indicating that socioeconomic standard within the inner city is generally high, while the environmental quality is generally low.
169

Digitale Geländemodelle im Hochwasserschutz: Detektion, Extraktion und Modellierung von Deichen und vereinfachte GIS-basierte Überflutungssimulationen

Krüger, Tobias 18 May 2009 (has links)
In der Arbeit werden Möglichkeiten des Einsatzes von Digitalen Geländemodellen (DGM) im Kontext des Hochwasserrisikomanagements aufgezeigt, wobei die Anwendung hochauflösender Laserscandaten im Fokus steht. Zunächst wird die Notwendigkeit der wissenschaftlichen Auseinandersetzung mit Hochwassergefahren hervorgehoben. Dies schließt die Betrachtung der Bedeutung von Geodaten (insbesondere DGM) im Hochwasserrisikomanagement ein. Es folgt eine Darstellung der verwendeten Daten, begleitet von einer Zusammenstellung von Methoden zur großflächigen Erfassung des Georeliefs und einer kurzen Einführung in die Hochwassermodellierung. Die wissenschaftlichen Arbeitsziele werden im Kontext eines interdisziplinären Projektes zur Hochwasserrisikoforschung definiert, in welchem DGM erstmals auch als dynamische Komponente des Risikosystems aufgefaßt werden. Die Arbeitsziele umfassen in diesem Zusammenhang die Entwicklung von automatisierten Methoden zur Gewinnung von Informationen über Deiche, insbesondere über deren genaue Lage und Höhe, und zur Modellierung von Deichgeometrien. Nach der Umsetzung und Erprobung der Verfahren in einem Geoinformationssystem wird der Prototyp einer Softwareanwendung vorgestellt, der eine automationsgestützte und nutzerfreundliche Realisierung der entwickelten Methoden erlaubt. Der Teil Deichmodellierung in Digitalen Geländemodellen beschreibt theoretische Grundlagen zur Realisierung eines speziell auf Hochwasserschutzdeiche ausgerichteten Geoinformationssystems. Es wird der Begriff des Digitalen Deichmodells (DDM) eingeführt und dessen Modellstruktur sowie Möglichkeiten zu Datenerfassung und -pflege mittels hochauflösender Laserscan-DGM erläutert. Weiterhin werden bestehende Methoden der Objekterkennung in DGM zum Zweck der Deichdetektion und -extraktion adaptiert und ein neues Verfahren entwickelt, das speziell die geometrischen Spezifika von Deichen berücksichtigt. Mit den vorgestellten Verfahren wird deren weitgehend automatisierte Erfassung und Kartierung ermöglicht. Das DDM wird derart konzipiert, daß sowohl Rückbau, Verlegung als auch die Erhöhung von Deichen im Modell umsetzbar sind. Damit wird letztlich die Simulationsfähigkeit bzw. Veränderlichkeit eines DGM als Basis für Hochwassersimulationen realisiert. Im Kapitel Vereinfachte GIS-basierte Überflutungssimulationen wird ein Konzept zur vereinfachten GIS-basierten Folgenabschätzung von Deichbrüchen vorgestellt. Dafür werden bestimmte Modellannahmen getroffen und zur Überflutungsmodellierung herangezogen. Die Ergebnisse werden im Rahmen der Modellannahmen kritisch als Möglichkeit der Abschätzung von im Extremfall zu erwartenden Wasserständen in Überschwemmungsgebieten bewertet. Nach der Dokumentation der praktischen Umsetzung der vorgestellten Verfahren werden die Ergebnisse diskutiert und Ausblicke zur nötigen bzw. möglichen weiteren Forschungsarbeiten gegeben. Der Anhang der Arbeit enthält Karten und eine Dokumentation des Programms Diketools, das als Prototyp einer Deichmodellierungssoftware implementiert wurde. / This study examines possibilities of using Digital Terrain Models (DTM) in the context of flood risk management. Thereby the focus lies on the application of high-resolution laserscan data. First the necessity of the scientific examination of flood hazards is underlined which implies the consideration of geodata (especially DTM). This is followed by an overview of methods of large-area data acquisition of the earth surface as well as a short introduction into flood modelling. The scientific objectives of this study are defined within the context of a multidisciplinary research project which for the first time considers DTM as a dynamic component in the flood risk system. The objectives resulting from this point of view comprise the development of automated methods of acquiring information on dikes. Here the exact locations of dikelines and their crest levels are of special interest. The modelling of new dike geometries and their implementiation into existing DTM data is also included. Chapter 4 (Deichmodellierung in Digitalen Geländemodellen, engl.: Dike Modelling in Digital Terrain Models) describes the theoretical fundamentals of the realisation of an information system focused on flood protection dikes. Here the term Digital Dike Model (DDM) is introduced. Accordingly its model structure is defined and possibilities of data retrieval and data management by means of high-resolution laserscan terrain models are shown. The detection and extraction of dikes is accomplished by the adaption of existing object-extraction methods. Also a new procedure has been developed which accounts for dike-specific geometrical characterisations. The presented methods enable the automated identification and mapping of dikes. The Digital Dike Model has been designed to allow the removal and relocation of dikes as well as their heightening within the model. Hereby the desired changeability of Digital Terrain Models is realised as a basis for flood simulations. In Chapter 5 (GIS-basierte Überflutungssimulationen, engl.: Simplified GIS-based Flood Modelling) a concept for a simplified estimation of dike-breach induced floodings by means of GIS-based procedures is presented. This implies the definition of certain model assumptions which are adopted when performing flood simulations. The results are discussed and the use of this method for estimating maximum flood impacts is evaluated. These parts of the thesis are followed by the discussion of the results. In the end an outlook for further research is given. The appendix of this work includes maps and a documentation of the Diketools which has been implemented as a prototype of a dike-modelling software.
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Eco-route modelling using GIS : How to find the most sustainable route option

Gillman, Malin January 2021 (has links)
In a time when the concept of sustainability is gaining increasing attention among the public, as well as among stake holders and policy makers, informing people about what the most sustainable choice to make is, is crucial in leading people in the right direction.  Travelling is an activity requiring a traveller to make multiple choices, with one of the choices being which route between two places to take. The transport sector is also a strong contributing cause to global issues such as climate change, wherefore choices made in relation to transportation are highly relevant in regard to sustainable development.  Up until today, most traffic information systems for passenger car users, only provide travellers with suggestions about the fastest, or the shortest, route option. This study aims at proposing a modelling structure using GIS software, that could also return the most sustainable route alternative.  The complexity of the many spatial impacts of road transportation is thoroughly discussed in the literature review, together with dilemmas regarding route choice behaviours. A proposed modelling structure is presented, with the structure also empirically being examined as a “proof of concept”. The empirical work takes place in the urban area of Hörnefors, Sweden, and findings confirm the applicability of the proposed workflow.  In the specific case of Hörnefors, three distinct route options are investigated, in relation to four sustainability impact variables. The variables investigated are fuel consumption, air pollution, noise, and safety. Results show that the, by far, longest route, is in fact returned as the most sustainable route option. The other two route options exhibit impacts of around double the amount of impacts yielded by the most sustainable one. The generalised sustainability cost is significantly mostly determined by the air pollution variable, due to its far-reaching spatial dispersion patterns yielding impacts even at long distances from a road.  The potential application of the inclusion of sustainability in traffic information systems are additionally reviewed, according to the behavioural mechanisms mentioned in the literature 4review. Estimations of in what contexts “most sustainable route” suggestions are potentially most likely to yield behavioural changes, are also made, and assessed. Conclusions suggest that an inclusion of “most sustainable route option” modelling into travel information systems, have the highest potential to affect route choices when the user is driving at locations previously unvisited, due to the inexistence of a status quo route in such contexts.

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