The “Renaturation” of Urban Rivers: The Case of the St Charles River in Quebec

Brun, Alexandre

doi:10.1007/978-94-017-9801-3_24

Cited by 14 publications

(9 citation statements)

References 6 publications

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“…Urban rivers and streams, which provide focal points for reconnecting urban residents with nature in otherwise densely populated areas (Lundy & Wade, ), are central to city planning and design (Brun, ). The amenity/dis‐amenity of urban rivers and streams affects the quality of life of urban dwellers globally, especially in cities experiencing urban expansion and densification, in which natural landscapes become scarce (Hui et al., ), the urban environment is polluted, and high‐rise residential buildings are dominant.…”

Section: Discussionmentioning

confidence: 99%

“…A majority of urban residents show a strong preference to reside in and relax near riverscapes (Åberg & Tapsell, ). However, the provision and appreciation of urban rivers’ amenities have been overshadowed by extensive environmental degradation caused by human interference such as channelisation, culverting and aquatic pollution (Åberg & Tapsell, ; Brun, ; Walsh et al., ). In particular, polluted urban watercourses containing elevated levels of various chemical and microbial contaminants may not only depress riverscape amenity value and aesthetic quality (Wood & Handley, ), but also create nuisance and sometimes even jeopardise public health in neighbouring households (Li et al., ; Scholes et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Impacts of urban stream pollution: A comparative spatial hedonic study of high‐rise residential buildings in Guangzhou, south China

Chen

2018

Geographical Journal

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Urban streams are scarce natural elements in compact cities, and suffer from pollution in the course of city expansion and densification, especially in developing nations like China. They may offer the amenity of a riverscape view, but also the dis-amenity associated with water pollution. Yet whether and how polluted urban streams affect high-rise residential property values remain under-investigated.Based on a total of 315 transaction records of apartment sales in two residential precincts located near two typical urban streams in Guangzhou, south China, this study attempts to assess the impacts of urban river pollution, in terms of view and proximity, at a neighbourhood level. A novel "cube contiguity", consisting of a three-dimensional spatial weighting matrix, is developed to incorporate the effect of property height in hedonic price models. Comparison of the spatial hedonic analysis of the two selected residential precincts reveals that views of heavily polluted urban streams fail to command a premium, and the impacts of proximity to urban streams vary considerably in high-rise, compact urban contexts, when micro-level landscape variations are carefully represented in hedonic modelling.This could be associated with the hydro-morphological features and riverine landscape, as well as with homebuyers' subjective perception of river pollution.Assessing the impacts of urban stream pollution could provide a basis for understanding the negative externalities of urban river pollution, establishing priorities for restoring polluted urban streams, and planning the provision of multi-functional green-blue spaces with respect to homebuyers' demand for environmental amenities in mid-and high-rise housing markets in both developed and developing nations. K E Y W O R D Scube contiguity, Guangzhou, high-rise residential building, spatial hedonic model, urban river pollution

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impacts of urban stream pollution: A comparative spatial hedonic study of high‐rise residential buildings in Guangzhou, south China

Chen

2018

Geographical Journal

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“…The existence of a potential linkage between community composition, stream assessment, and temperature, going into both directions, will ultimately have to be considered in management and restoration projects [13,41] as it raises the hope that timely actions on climate change effects could effectively reverse previous changes in stream communities. Recently, it was argued that community changes can be accompanied by a temporal debt due to abiotic stress [72].…”

Section: Potential Implication and Mitigation Measuresmentioning

confidence: 99%

Do changes in temperature affect EU Water Framework Directive compliant assessment results of central European streams?

2020

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Background Benthic invertebrate communities are an integral and longstanding component of stream biomonitoring. However, multiple stressors driven by global change threaten benthic invertebrate communities. In particular, climate warming is expected to disrupt freshwater ecosystems. While an increasing number of studies have shown changes in benthic invertebrate community composition in response to climate warming, the effect on stream assessments has rarely been investigated. As several community composition metrics are also used in stream assessments, we predicted that climate warming would worsen stream assessment results. Therefore, we used a comprehensive data set of 2865 benthic invertebrate samples taken between 2000 and 2014 from small central European low mountain streams. We examined the effects of changes in temperature on common community and stream assessment metrics. We used 31 metrics covering composition, richness, tolerance and function of communities, of which many are used in various stream assessment schemes. Results Against our expectations, we identified a decreasing air temperature trend of − 0.18 °C over 15 years. This trend was accompanied by significant changes in community composition, for example, increases in species richness and decreases in the community temperature index (CTI). Further, we identified slight concomitant improvements of various globally used stream quality assessment metrics, such as a decreasing saprobic index and an increasing BMWP. Conclusions While temperature increased by + 0.9 °C during the past 30 years (1985–2014), our 15-year study period (2000–2014) showed a decrease by − 0.18 °C. Therefore, we regard the concomitant improvement in several assessment metrics as a recovery from prior increasing temperatures. In turn, we assume that increases in water temperature will lead to opposite effects and therefore cause declining assessment results. Water managers should be aware of this linkage that in turn could provide a chance to mitigate the effects of global warming by, for example, planting trees along the rivers and the removal of artificial barriers to increase current velocity to minimize a warming effect.

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“…Plusieurs facteurs expliquent le succès de cette opération spectaculaire (Brun, 2015). Tout d'abord, l'association dans un seul et même projet de territoire de deux démarches a priori distinctes : la première consistait à poursuivre en l'intensifiant la rénovation urbaine de la basse ville de Québec bordant la SaintCharles ; la seconde visait à améliorer la qualité des eaux et les paysages de cet affluent du Saint-Laurent grâce à des chantiers multiples (modernisation des réseaux d'eau pluviale, destruction des quais bétonnés trente ans plus tôt, etc.)…”

Section: Une Clarification Par Un Retour Au Terrainunclassified

Le projet IDEAUX : les métamorphoses d'une recherche confrontée à l'action

Brun

2017

Nat. Sci. Soc.

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The “Renaturation” of Urban Rivers: The Case of the St Charles River in Quebec

Cited by 14 publications

References 6 publications

Impacts of urban stream pollution: A comparative spatial hedonic study of high‐rise residential buildings in Guangzhou, south China

Impacts of urban stream pollution: A comparative spatial hedonic study of high‐rise residential buildings in Guangzhou, south China

Do changes in temperature affect EU Water Framework Directive compliant assessment results of central European streams?

Le projet IDEAUX : les métamorphoses d'une recherche confrontée à l'action

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