Dans le contexte international de requalification des fronts d’eau urbains amorcé dans les années 1960, les espaces fluvio-urbains rhodaniens apparaissent comme singuliers. Malgré le discours des édiles locaux et un potentiel urbanistique certain, les rives urbanisées du Rhône à l’aval de Lyon ne font pas l’objet d’aménagements contemporains d’envergure. Le patrimoine urbain des rives rhodaniennes est figé ou délaissé, jusqu’à tomber parfois en déshérence. Cet immobilisme rivulaire reflète le paradoxe rhodanien de l'atonie de villes installées sur les rives d’un fleuve majestueux et profondément aménagé. Il démontre aussi que la reconquête des waterfronts n’est pas un processus systématique ni universel.La marginalisation de ces rives s’explique par la conjonction de facteurs relevant à la fois de l’hydrosystème et du sociosystème. L’hydrologie rhodanienne agit comme une contrainte sur les espaces fluvio-urbains qui sont aussi pénalisés par les dysfonctionnements d’un jeu d’acteurs lacunaire et par la pesanteur des infrastructures routières installées sur les berges. Ces éléments s’insèrent dans un cadre administratif et réglementaire complexe qui est une entrave supplémentaire à la recomposition des rives urbaines. Les faiblesses de la gestion de ces espaces s’accompagnent d’un défaut de prise en charge du risque d’inondation : les villes peinent à adopter des politiques de prévention en raison de la variabilité spécifique du risque rhodanien et de l’inertie propre au système des acteurs urbains. Cependant, le risque, en devenant objet politique, s’affirme comme un élément moteur participant à l’aménagement global du territoire rhodanien. La mise en place du « Plan Rhône », projet intégré de développement durable visant la gestion concertée du risque à l’échelle du bassin, constitue le point de départ d’un renouvellement territorial. Les villes en sont encore pour l’instant tenues à l’écart. / The urban river spaces in the lower Rhône valley are a special case in the international waterfront redevelopment process that began during the sixties. There has been no significant restructuring of Rhône riverfronts downstream of Lyon in spite of their urbanistic potential and the wishes expressed by some local authorities. The urban heritage of the Rhône riverbanks is ossified or neglected and sometimes completely abandoned. This lack of action concerning the waterfronts reflects the paradoxical situation concerning the Rhône valley: a combination of inert towns and an imposing river that has been highly developed. It also shows that waterfront redevelopment is neither a systematic nor a universal process.The marginalization of these river-banks is due to factors related to both the hydrosystem and the social system. The hydrology of the river acts as a constraint on urban planning, and the Rhône riverfronts also suffer from problems caused by deficiencies in the various bodies involved and from the heavy road infrastructures built on the river-banks. A complex administrative and legislative framework further hampers the urban redevelopment of the river spaces.Poor management of these riverfront spaces combines with failures in flood risk policies. Cities struggle to apply safety politics because the Rhône presents a specific and changing risk and because of the passivity of the urban actors. However, as the risk has become a political issue, it has turned out to be a driving force behind the development of the Rhône riverbank area. An integrated sustainable development project named “Plan Rhône” aims at coordinating risk management in the whole of the river basin, and is the first step in territorial renewal. The towns are not yet involved in this project.

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第22057号 / 工博第4638号 / 新制||工||1723(附属図書館) / 京都大学大学院工学研究科都市環境工学専攻 / (主査)教授 田中 宏明, 教授 伊藤 禎彦, 講師 中田 典秀 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

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This research is an exploration of the local, place-based knowledge surrounding a degraded urban river, the Lower Neponset River and Estuary in southern Boston Harbor, Massachusetts, and its environmental restoration. Through a mixed-methods approach to sociological inquiry that included 18-months of ethnographic interviews and participant observations, Geographic Information System (GIS) mapping, archival document research, and critical environmental history, it explores the different ways local citizens interpret the river as a place of historical importance, personal nostalgia, social and family networks, neighborhood legacies, aesthetics, economic security, danger, psychological refuge, ecology, and political power. Using an interpretive analysis of the narrative, visual, and spatial data related to those meanings, it then explores how such different local, place-based interpretations can be used to inform the theory, practice and politics of urban river restoration. The research shows that recognition of the socio-cultural diversity in local citizen interpretations of the Lower Neponset River's restoration is important for environmental managers, planners, and local decision-makers to recognize alongside ecological and economic development "best-practices" (e.g., holistic watershed management, anadromous fish re-introduction, flow and function, ecosystem services, affordable housing quotas, "Smart" growth, etc.). The research recommends that environmental managers, planners, and local politicians and decision-makers give equal consideration to the socio-cultural, political, economic, and ecological factors surrounding urban rivers, and the diversity of meanings that their "restoration" conjures, in order to make strides towards ethical environmental restoration and management practices that are socially, as well as environmentally, sustainable.

The Trinity River is an urbanized, effluent-dominated river, and is heavily relied upon for drinking water. The benthic macroinvertebrate community has been monitored for over 20 years, with the focus of this dissertation on three studies (1987-88, 2005, and 2011). Water quality improvement following dechlorination resulted in increased benthic metrics. Overall habitat quality, in-stream cover, surface water total organic carbon, sediment total organic carbon, near-field urban land-use, near-field forested land-use, surface water surfactant toxic units, and depositional sediment biofilm fatty acids all have statistically significant relationships with benthic macroinvertebrate metrics. These relationships are better defined with increased taxonomic resolution at the genus/species level for all benthic taxa, including Chironomidae and Oligochaeta. It is recommend that benthic identifications for state and city water quality assessments be done at the genus/species level. A novel method for quantifying depositional sediment biofilm fatty acids has been produced and tested in this dissertation. Benthic metrics are directly related to fatty acid profiles, with several essential fatty acids found only at upstream sites.

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Made available in DSpace on 2016-08-10T10:44:42Z (GMT). No. of bitstreams: 1 HUGO MARQUES CABRAL.pdf: 3266195 bytes, checksum: 005f92cb72bd9b512900b2c338cd375c (MD5) Previous issue date: 2014-12-12 / The environment degradation, in a general way, has been provoking several discussions regardless the anthropogenic activities that make them happen, primarily, due to water resources, what, in certain ways, induce changes in the environment and in the people s life quality. In this way, this paper aimed to pursue the environmental perceptions of the Meia Ponte river s riverside people, in the urban area of Goiânia. To obtain this purpose it was used bibliographic and documentary appointments, then was carried the field investigation through forms and interview with the riverside population in the areas Jaó and Negrão de Lima. The obtained data shows that the river, despite its importance for the city and its riverside population, they realize that environmental problems in the study region commits even the quality of population´s life. The researched riverside associate the importance of preserving the environment of the river to improve the lives of the residents. In order to preserving the waterways the riverside population understands how important it s to educate children and adults. The government is understood by the riverside population as the most important sector for protecting Meia Ponte s river despite being the one that has the lowest responsibility. The riverside population wants to protect Meia Ponte s river, however, they continue to deteriorate the Meia Ponte river. So, it s understood that, with organized community, each person s contribution, the government and the EA actions aiming the studied region and the other ones that lay on the water courses it s possible to reverse the degradation s process of Meia Ponte s river. / A degradação do meio ambiente, de um modo geral, tem provocado diversas discussões a despeito das atividades antrópicas que as provocam, principalmente, em se tratando dos recursos hídricos, o que, de certo modo, provoca alteração na qualidade do ambiente e de vida da população. Assim, objetivou-se verificar a percepção ambiental da população ribeirinha do rio Meia Ponte, no perímetro urbano de Goiânia. Para alcançar esse objetivo, utilizou-se, em primeiro momento, de consultas bibliográficas e documentais e, em seguida, foi realizado o trabalho de campo por meio de formulários e entrevistas junto à população ribeirinha nos setores Jaó e Negrão de Lima. Os dados obtidos apontam que o rio, apesar de sua importância para a cidade e para os ribeirinhos, os mesmos percebem que os problemas ambientais na região do estudo compromete até mesmo na qualidade de vida dessa população. Os moradores pesquisados associam a importância em preservar o ambiente do rio para melhorar a vida desses moradores. Para que ocorra a preservação dos cursos d água a população ribeirinha compreende o quanto é importante educar crianças e adultos. O poder público é percebido pela população ribeirinha como sendo o setor de maior relevância para a proteção do rio Meia Ponte, apesar de ser o que possui a menor responsabilidade. A população ribeirinha possui a intenção de ajudar na proteção do rio Meia Ponte, porém, continuam a promover a degradação do rio Meia Ponte. Logo, entende-se que com a comunidade organizada, a contribuição pessoal de cada indivíduo, com o auxílio do poder público e ações de EA voltadas para a região do estudo e para as demais regiões que margeiam os curso d água é possível reverter o processo de degradação do rio Meia Ponte.

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Les Résidus de Médicaments (RM) sont des molécules biologiquement actives et leur présence dans l'environnement peut induire des effets sur les écosystèmes. Afin de caractériser l'impact écotoxicologique lié à l'utilisation de ces molécules dans la région toulousaine, 26 RM ont été recherchés dans les eaux usées de deux Stations de Traitement des Eaux Usées (STEU) de la ville de Toulouse et dans le milieu récepteur de leurs rejets, la Garonne. Dans la Garonne, les prélèvements ont été réalisés en amont et en aval des effluents des STEU afin d'étudier l'impact de ces effluents sur le risque associé à la présence de ces RM dans le fleuve. Le risque écotoxicologique potentiel a été évalué en comparant, pour chacun des RM étudiés, les concentrations mesurées in situ (exposition) et les concentrations écotoxiques (danger). Ces comparaisons ont permis la définition de quotient de risque (RQ) en fonction du temps et de l'espace. Les résultats des analyses ont montré que, malgré le fait que la plupart des molécules soient détectées dans la Garonne en amont des rejets des STEU, certains RM ont présenté des concentrations significativement plus importantes dans la Garonne en aval des rejets. Ces résultats soulignent l'impact des effluents toulousains sur le risque associé à la la présence de RM dans la Garonne. Dans le cadre de ces travaux de recherches une base de données (BDD) a été développée qui intègre 1/ des données d'écotoxicité issues de la littérature scientifique (1237 données issues de bio-essais, modélisations et bio-marqueurs et 382 Predicted No Effect Concentrations (PNEC)) ; 2/ des données d'exposition à l'échelle de l'agglomération toulousaine (125 échantillons récoltés). L'étude des RQ, à partir des plus basses PNEC actuellement disponibles dans la BDD, a montré des risques écotoxicologiques potentiels liés à la présence de 7 RM dans la Garonne sur les 26 recherchés. Ces 7 RM sont, dans l'ordre décroissant des pourcentages d'occurrence des risques associés, Carbamazépine (anti-épileptique) (100%), Clarithromycine (100%), Diclofénac (anti-inflammatoires non stéroïdiens (AINS)) (100%), Estrone (hormone sexuelles) (100%), Ofloxacine (antibiotiques) (93%), Ibuprofène (AINS) (62%) et Propranolol (cardiovasculaire) (31%). L'étude des concentrations écotoxiques inclues dans la BDD ont montré des variabilités intramoléculaires importantes. Pour l'évaluation des risques environnementaux (ERE), la réglementation européenne recommande d'utiliser une seule donnée d'écotoxicité pour définir le seuil toxique requis pour l'ERE (PNEC). Ces variabilités intramoléculaires démontrent que le déploiement de la démarche proposée par la réglementation pour l'ERE peut générer une sous-estimation des risques écotoxicologiques. De plus, la variabilité temporelle des données d'exposition engendre, pour les 7 RM identifiés comme potentiellement dangereux, 1/ l'alternance des périodes à risque et à non risque pour le Ibuprofène, Ofloxacine et Propranolol; 2/ des risques avérés quelle que soit la période considérée pour la Carbamazépine, Clarithromycine, Diclofénac et Estrone. Ces résultats suggèrent que, la variabilité des concentrations, qu'elles soient prédites (PEC) ou mesurées (MEC), doit être prise en compte pour mesurer l'impact de la présence de RM sur les écosystèmes aquatiques. Avec un meilleur accès aux soins de santé et une population vieillissante menant à une poly-médication, la production, l'utilisation et l'élimination des produits pharmaceutiques devraient augmenter. De par le rôle des médicaments dans la santé publique et les impacts potentiels sur les écosystèmes, cette problématique associée à la présence de RM dans les milieux aquatiques doit être prise en charge par une action concertée afin de prévenir, réduire et gérer l'introduction des RM dans l'environnement. / Drug residues (DR) are biologically active molecules and their environmental occurrence can produce negatives effects on the ecosystems. In order to identify the ecotoxicological impact linked to their use in the Toulouse area, 26 DR were searched in two waste water treatment plant (WWTP) of Toulouse, inlet and outlet, and into the natural water receiving the WWTP releases, the Garonne river. In the Garonne river, sampling were carried out upstream and downstream of WWTP outlets in order to study impact of their releases on the ecotoxicological risks linked to the DR occurrence in the river. Ecotoxicological risks were estimated with the ratio between measured environmental concentrations (exposure) and environmental hazard threshold (hazard) for each drug. These ratios allowed to define hazard quotients (HQ) according to time and space. Despite the fact that most of DR were detected in the Garonne upstream of WWTP releases, some of them showed significant greater concentrations downstream the WWTP releases. For these last ones, results highlight that WWTP releases are responsible for the ecotoxicological risks linked to the presence of DR in the Garonne river. As part of this study, a database was made, including 1/ ecotoxicity data coming from scientific literature (1237 data provided from bioassays, modellings and biomarkers and 382 Predicted No Effect Concentrations (PNEC)); 2/ exposition data from Toulouse city (125 collected samplings). Since the lowest PNEC available in the database, the HQ study showed ecotoxicological risks linked to the occurrence of 7 DR in the Garonne among the 26 searched. In the decreasing order of the risks percentage occurrence, these 7 DR are Carbamazepine (antiepileptic) (100%), Clarithromycin (antibiotic) (100%), Diclofenac (non-steroidal anti-inflammatory drug (NSAID)) (100%), Estrone (sexual hormone) (100%), Ofloxacin (antibiotic) (93%), Ibuprofen (NSAID) (62%) and Propranolol (cardiovascular) (31%). The ecotoxicity concentrations integrated in the database showed important intra-molecular variabilities. For environmental risk assessment (ERA), european regulation recommends to use only one ecotoxicity data to define the environmental threshold required for the ERA (PNEC). These intra-molecular variabilities demonstrate that implementation of the ERA process proposed by regulation could create under-estimations of the ecotoxicological risks. Moreover, exposure data temporel variability for the 7 DR identified as potentially hazardous causes 1/ alternation of risked and non-risked periods for Ibuprofen, Ofloxacin and Propranolol; 2/ proven risks whatever the considered period for Carbamazepine, Clarithromycin, Diclofenac and Estrone. These results suggest that concentrations variability, whether predicted (PEC) or measured (MEC), should be taken into account to assess the DR impact on the aquatics ecosystems. With better access to health care and an ageing population leading to a multiple medication, the production, the use and the pharmaceuticals elimination should increase. Because of their role in the public health and their potential impact on the ecosystems, the presence of DR in the aquatic environments is an issue that should be taken in hand by a concerted action in order to prevent, reduce and manage DR release in the environment.

All living things mostly the humans, as builders of civilizations, have always been in intrinsic bonds with water. This interaction between water (oceans, seas, lakes, rivers etc.) and settlements has existed since ancient civilizations. Among water resources, &lsquo / flowing waters&rsquo / such as rivers, streams, creeks, etc. have a prominent role as they are the lifeblood of most cities in terms of providing transportation, security, energy, irrigation, commerce, and recreation. By the late 19th century, developments of terrestrial transportation modes diminished the magnetism of rivers and riverfronts, and growing industries led to the deterioration of rivers. Owing to these reasons, along with many others, they turned into sewage channels, were covered up, and became water scopes detached from the urban life. Particularly since the 1970s, with more attention given to sustainability of resources, a greater awareness has grown of the vital role of urban rivers as a resource for humans and a lifeline for cities. After being neglected for decades, urban rivers have started to be rehabilitated to solve the related problems. The new approach to urban river rehabilitation beyond classical practices that aim at recovering the physical conditions of rivers has come to the fore to address the problems comprehensively. Instead of independent and one-dimensional practices, the urban rivers have become to be seen as a vital part of urban water system and of the city itself. While rehabilitating urban rivers, recovering river health can be ensured provided that the entire urban water ecosystem is taken into consideration. The ecocity approach is one of the major new approaches that geared toward achieving a healthy city, and sustainability of water system is the significant goal within this approach. In this regard, the thesis first asserts that the ecocity criteria are likely to give way to a more sustainable future for urban rivers. Besides being a part of the ecosystem, urban rivers have transformed together with the surrounding built environment throughout the history of cities. Significant focal elements of the urban pattern, urban rivers should be dealt with other urban focal points, with the introduced concept of river-city integration, which is proposed as the second assertion of the thesis. In this respect, the study attempts to investigate urban rivers and their rehabilitation in relation with both the ecocity approach, and the river-city integration concept. The research methodology in the present study involves comparative anaysis of best practices and case study analysis. Porsuk River and the city of Eskisehir, which the river passes through, were selected as a case for empirical study. Criteria sets that determined within the frames of ecocity and river-city integration, and the testing of the criteria in the case area offers an opportunity to contribute to literature of river and city coexistence.