Search results for "050703 geography"
showing 10 items of 345 documents
Where Alonso meets Sierpinski: an urban economic model of a fractal metropolitan area
2004
International audience; La coexistence d'activités résidentielles et agricoles dans des ceintures périurbaines caractérise de nombreuses aires métropolitaines modernes. Malheureusement, peu de modèles théoriques de l'économie urbaine prennent en compte ce type de mixité spatiale. L'article contribue à combler cette lacune : les auteurs présentent un modèle de localisation résidentielle (standard en économie urbaine) opérant dans un espace structuré par la géométrie spatiale. Plus précisément, d'un côté, un tapis de Sierpinski est utilisé pour rendre compte de l'organisation hiérarchisée de sites urbains et ruraux dans une aire métropolitaine. D'un autre côté, un ménage maximise, sous contra…
L’approche par les ressources : pour une vision renouvelée des rapports entre économie et territoire
2016
International audience
Economies d'agglomération et configurations spatiales dans les espaces ruraux
1997
The question to be addressed here is that of the agglomeration/dispersion forces that are likely to account for the location of people and jobs in rural areas and the way they explain spatial patterns in rural areas depending on urban influence. Economic geography models may provide suitable tools with which to investigate the organization of rural areas. We first review these models, focusing on dispersion forces, which rest basically on land consumption and transport costs. We suggest then a set of hypotheses concerning the main forces at work in rural areas. Intensity of agglomeration economies is hypothesized to be related to the urban size, which in turn induces increasing land rents a…
La France périurbaine
2018
International audience
La résilience : un concept pour la gestion des risques
2007
Les systemes socio naturels possedent la capacite de resister aux aleas. Les catastrophes les perturbent, mais les font rarement disparaitre. Le concept de resilience, d’origine physique, qui illustre cette capacite s’est enrichi lors de son transfert dans differentes disciplines scientifiques. Certes, la resilience est difficile a mesurer. Mais sa connaissance permet d’adopter de nouvelles formes de gestion des risques naturels ou sociaux. Ces nouvelles formes de gestion sont tres differentes des approches technologiques qui ne sont pas toujours bien adaptees au milieu ou a la societe.
Barriers and (im)mobility in Rio de Janeiro
2016
In Rio de Janeiro, immobility or the share of people with no journeys on any given day is very high (46%). Immobility has a marked geographical dimension in what is a segregated city. But income has only limited explanatory power. The population structure, with high proportions of people who are not in the labour force and who are unemployed, accounts for the high levels of immobility in the poor districts. Although population structure effects prevail, spatial factors such as the severance effect also account for differences between districts. Indeed, Rio de Janeiro features many different types of barriers that affect immobility in several districts and for several population groups. The…
Urbanization and forest degradation in east Africa - a case study around Dar es Salaam, Tanzania
2016
In this paper we examine the impact of the growing urbanization of Dar es Salaam, Tanzania, on the forest areas around the city. Since 1990 the city has seen an annual population growth rate of over 4%. We document the expansion of the city over the last 30 using the Global Human Settlement Layers, derived from the global Landsat archive. At the same time we show the depletion, of the surrounding forests that has occurred to meet the growing demand for agricultural land, fuel wood and construction material over the same period. The impact on these forests as a result of the demand from an expanding urban conglomeration is higher than would be expected from a dispersed population increase. T…
Managing Metro Manila
2017
Metro Manila residents are confronted everyday with the challenges of flooding, substandard housing and horrendous traffic. In this low altitude plain, any significant rainfall raises water levels in many small streams, and contributes to traffic jams. The rapid population growth of the metropolis has led to the proliferation of squatter areas, including alongside flood-prone rivers and railroad tracks. The lack of discipline and of decent garbage management contribute in turn to a worsening of floods when streams are covered with litter. The fast rise in motorization rates, coupled with the many imperfections of the public transport system, make Manila one of the most congested cities in t…
Critiques of island sustainability in tourism
2019
Island sustainability influences and is influenced by tourism resources, such as sun, sea, and sand for warm water destinations and ice and large mammals for cold water destinations. To understand ...
The discursive construction of an active rural community
2016
In this article, I will study active rural communities, how they are constructed in the speech of local people involved in community development practices. Over the past twenty years, community-led development practices have been a new paradigm for the rural development in Finland, which has been reflected as increasing number of village associations. I will analyse the discursive construction of the active community by interviewing all the present and previous leaders of three active village associations in the province of Central Finland. Active rural communities are constructed through village associations, by their local activities and self-consciousness as active communities. In the lo…