Suchergebnisse

Algiers currently suffers from a very pronounced city/port separation, the negative consequences of this situation affect the daily life of the city, the urban interests of the city, mainly the comfort of the citizens, overlap with the economic interests of the port, because urban activity and port activity remain opposite in nature. Based on its conflicted situation between city and port, the purpose of this article is to prospect through a set of future city / port scenarios. Using the scenario method, this research is carried out in two parts, in a first phase, the aim is to understand the evolution and mutations of port cities considered standard on a global scale, on this basis, and in a second phase, the objective is to prospect the future urban-port of Algiers. Four scenarios for the future reconversion of the port of Algiers, in which Algiers could become one of the great world capitals, are discussed. In fine, the appropriate scenario could be the one that proposes the organization of a universal event such as the Olympic Games. This option remains very interesting and feasible because it will achieve all the goals to promote Algiers in a sustainable way and to put it back in competitiveness against its rivals and counterparts in Mediterranean metropolises.

Sustainable development projects require careful balancing of economic interests and ecological needs. The case of Skikda, a city in northeast Algeria, located on the Mediterranean coast, illustrates the challenges connected with such a development. The ancient city coexists with a young hydrocarbon port and industrial pole that serves as a transfer hub in the flow of petroleum between hinterland and sea. The installation of the port and petrochemical refining plants on the banks of the estuary of the Safsaf River presents many challenges to local citizens and the ecosystem, including pollution of the water system, groundwater, and river water, and damage to the area's ancient heritage. This study argues that we need new and less polluting forms of intermodality between hinterland and seaport to make urban mobility more sustainable. It asks whether and how the existing rivers and wadis (river channels that are dry except during rainy periods) can be transformed into artificial canals for river navigation to improve the transport fluidity and sustainability of Skikda. To answer this question, the study adopts a prospective approach using the MICMAC scenario method. This approach entails, first, presenting and evaluating the potentialities of the existing rivers of Skikda using QGIS, and second, discussing and proposing scenarios for transforming these rivers into urban waterways, that is, artificial canals for inland navigation. The prospect of inland waterway transport in Skikda may be a radical scenario, yet, despite its hydraulic capacity and advantages, this system is not receiving attention in Algeria. We suggest that water transport can breathe sustainable blue life into a vulnerable industrial port city, transforming its challenges into opportunities.

International audience ; In many Mediterranean cities like Algiers, urban sprawl and the adverse effects of climate change are gradually weakening vast areas of high quality agriculture. In order to adapt to and mitigate the effects of these phenomena, the public authorities have initiated public urban development policies, ranging from the green belt strategy to the 23 agripark policy. The objective of this article is to experiment the path of an alternative that exalts the constitution of a sustainable agro-urban territory. A dual sustainability method (internal and external) proposed by Aubry and Ba is applied and developed in the municipality of Chéraga, in order to provide a first global diagnosis on the sustainability of urban agriculture present in the agriparks. This allows us to identify several major issues, with a view to optimizing the sustainability of urban agriculture, reducing deficiencies and remedying the observed imbalances. ; Dans de nombreuses villes méditerranéennes comme Alger, l'étalement urbain et les effets néfastes des changements climatiques affaiblissent progressivement de vastes zones agricoles de haute qualité. Pour s'adapter aux effets de ces phénomènes et les atténuer, les pouvoirs publics ont initié des politiques publiques de développement urbain, allant de la stratégie de la ceinture verte à la politique des 23 agriparcs. L'objectif de cet article est d'expérimenter la voie d'une alternative qui exalte la constitution d'un territoire agriurbain durable. Une méthode de double durabilité (interne et externe) proposée par Ba et Aubry (2011) est appliquée et développée dans la commune de Chéraga, afin de fournir un premier diagnostic global sur la durabilité de l'agriculture urbaine présente dans les agriparcs. Ceci nous permet d'identifier plusieurs enjeux majeurs, en vue d'optimiser la durabilité de l'agriculture urbaine, réduire les carences et remédier aux déséquilibres constatés.

International audience ; In many Mediterranean cities like Algiers, urban sprawl and the adverse effects of climate change are gradually weakening vast areas of high quality agriculture. In order to adapt to and mitigate the effects of these phenomena, the public authorities have initiated public urban development policies, ranging from the green belt strategy to the 23 agripark policy. The objective of this article is to experiment the path of an alternative that exalts the constitution of a sustainable agro-urban territory. A dual sustainability method (internal and external) proposed by Aubry and Ba is applied and developed in the municipality of Chéraga, in order to provide a first global diagnosis on the sustainability of urban agriculture present in the agriparks. This allows us to identify several major issues, with a view to optimizing the sustainability of urban agriculture, reducing deficiencies and remedying the observed imbalances. ; Dans de nombreuses villes méditerranéennes comme Alger, l'étalement urbain et les effets néfastes des changements climatiques affaiblissent progressivement de vastes zones agricoles de haute qualité. Pour s'adapter aux effets de ces phénomènes et les atténuer, les pouvoirs publics ont initié des politiques publiques de développement urbain, allant de la stratégie de la ceinture verte à la politique des 23 agriparcs. L'objectif de cet article est d'expérimenter la voie d'une alternative qui exalte la constitution d'un territoire agriurbain durable. Une méthode de double durabilité (interne et externe) proposée par Ba et Aubry (2011) est appliquée et développée dans la commune de Chéraga, afin de fournir un premier diagnostic global sur la durabilité de l'agriculture urbaine présente dans les agriparcs. Ceci nous permet d'identifier plusieurs enjeux majeurs, en vue d'optimiser la durabilité de l'agriculture urbaine, réduire les carences et remédier aux déséquilibres constatés.

International audience ; In many Mediterranean cities like Algiers, urban sprawl and the adverse effects of climate change are gradually weakening vast areas of high quality agriculture. In order to adapt to and mitigate the effects of these phenomena, the public authorities have initiated public urban development policies, ranging from the green belt strategy to the 23 agripark policy. The objective of this article is to experiment the path of an alternative that exalts the constitution of a sustainable agro-urban territory. A dual sustainability method (internal and external) proposed by Aubry and Ba is applied and developed in the municipality of Chéraga, in order to provide a first global diagnosis on the sustainability of urban agriculture present in the agriparks. This allows us to identify several major issues, with a view to optimizing the sustainability of urban agriculture, reducing deficiencies and remedying the observed imbalances. ; Dans de nombreuses villes méditerranéennes comme Alger, l'étalement urbain et les effets néfastes des changements climatiques affaiblissent progressivement de vastes zones agricoles de haute qualité. Pour s'adapter aux effets de ces phénomènes et les atténuer, les pouvoirs publics ont initié des politiques publiques de développement urbain, allant de la stratégie de la ceinture verte à la politique des 23 agriparcs. L'objectif de cet article est d'expérimenter la voie d'une alternative qui exalte la constitution d'un territoire agriurbain durable. Une méthode de double durabilité (interne et externe) proposée par Ba et Aubry (2011) est appliquée et développée dans la commune de Chéraga, afin de fournir un premier diagnostic global sur la durabilité de l'agriculture urbaine présente dans les agriparcs. Ceci nous permet d'identifier plusieurs enjeux majeurs, en vue d'optimiser la durabilité de l'agriculture urbaine, réduire les carences et remédier aux déséquilibres constatés.

This article traces the centuries-long morphological development of Algiers' port-city interface across four historically relevant time periods that together span from the dawn of the 16th century up until today. Through a diachronic and geo-historical approach, we identify and analyse the origins of Algiers' persistent port-city divide. In doing so, the notion of the interface is interpreted as a spatial threshold between city and port, which nevertheless supports the material flows of both entities. As a multi-purpose area, the interface holds the potential to weave the disparate entities of a port city back together. To further complement this conceptual angle, we provide investigations of porosity that determine the differing degrees of connectivity between the city and port of Algiers. This is combined with a spatial-functional analysis of Algiers' current port-city interface, which is ultimately characterised as a non-homogeneous entity composed of four distinct sequences. These results contribute to a better orientation of imminent plans for waterfront revitalisations in Algiers. Whereas the interface was long considered as some kind of no man's land in the past, port and municipal authorities nowadays aim to turn the interface into a tool of reconciliation, and can do so by acting upon its potential porosity. Finally, this article's critical examination of the previously neglected case of Algiers can and should also be considered as an applicable model for the continuing study of southern Mediterranean and African port metropolises in general, which share a particular evolution in the relations between city and port.