Strategic Environmental Assessment in Latin America: A methodological proposal for urban planning in the Metropolitan Area of Concepción (Chile)

Rojas, Carolina; Pino, Joan; Castillo, Edilia Jaque

doi:10.1016/j.landusepol.2012.04.018

Cited by 42 publications

(27 citation statements)

References 31 publications

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“…For this reason, many new urban areas are developing in unsuitable directions, generally increasing exposure to natural risks [41]. Consequently, the recent urban sprawl observed in the CMA does not reflect a pattern of smart growth.…”

Section: Discussionmentioning

confidence: 99%

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)

Rojas¹,

Muñiz²,

Pino³

2013

JGIS

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Latin American cities, like those from North America and Europe, experience problems of urban sprawl. However, few studies have dedicated exclusively to this phenomenon in specific cities, and this omission is particularly noticeable regarding cities not considered among the megalopolis of the continent. The present work analyzes urban sprawl through an urban form in the Concepción Metropolitan Area, Chile, between 1990 and 2009, considering local aspects that may have played a role in the process. The main empirical results obtained from this study reveal a metropolitan area that has expanded intensely over a 20-year period, growing from 9000 hectares to more than 17,000 ha for a 96% increment in the built-up area. The new urban surfaces consolidate a central conurbation that strengthens the role of the main downtowns, with less-intense occupation towards the sub-centers but in a structure that follows the transportation infrastructure. Over the last 20 years, the distance between the shapes has grown progressively by around 2 km, increasing the size of the ellipse by more than 1000 km 2 . In particular the complexity of the urbanized surfaces has grown, becoming more irregular in shape and less compact as they come to occupy larger areas. So our principal findings include: an increment of nearly 100% in the urban surface, the importance of a polycentric urban structure in the process of consolidation as a support for analyzing different spatial dynamics, and the growing morphological irregularity of the territory of the sprawl.

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Section: Discussionmentioning

confidence: 99%

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)

Rojas¹,

Muñiz²,

Pino³

2013

JGIS

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“…Mide el grado de perturbación e intervención del humedal, según el nivel de antropización y urbanización de los usos y coberturas del suelo localizados en la matriz de 1 km (Rojas et al, 2013b). Se formula con la siguiente ecuación que propone una relación entre las categorías de usos y coberturas del suelo y su ocupación en el año 2010 (Cuadro N° 1).…”

Section: Indicador De Naturalidadunclassified

“…Se extrae del mapa de expansión urbana desarrollado en Rojas et al (2013b). -Densidad de población (DP): Es una de las variables más reconocidas de urbanización, normalmente se utiliza en modelos explicativos y predictivos del crecimiento urbano (Aguayo et al, 2007: Rocha, et al, 2010Rojas et al, 2014).…”

Section: Modelos Estadísticosunclassified

“…Sin embargo, esta investigación no mide la pérdida de superficie de los humedales por cambios de usos de suelo a urbano como los trabajos anteriormente mencionados. El estudio continúa en la línea de investigación en biodiversidad de humedales propuesta en Sepúlveda et al (2012); nuevamente se utiliza el indicador de naturalidad desarrollado por Rojas et al (2013b), pero esta vez como una variable dependiente, ya que en esta oportunidad se profundiza en la infl uencia de una serie de variables urbanas en la biodiversidad de cada humedal. El estudio pretende aportar a la investigación geográfi ca que identifi ca la pérdida de biodiversidad por causa de la urbanización, más aún en una ciudad latinoamericana de rápido y continuo crecimiento urbano (Pauchard et al, 2005;Rojas et al, 2013a).…”

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Patrones de urbanización en la biodiversidad de humedales urbanos en Concepción metropolitano

Rojas¹,

Sepúlveda-Zúñiga²,

Barbosa³

et al. 2015

Rev. geogr. Norte Gd.

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RESUMENLa urbanización en Concepción metropolitano (36°S) en las últimas décadas ha impactado áreas de valor ecológico, tales como humedales y lagunas. Aquí analizamos la perturbación de parámetros de biodiversidad en seis humedales urbanos, mediante la exploración y uso de indicadores. Se proponen tres indicadores: naturalidad y riqueza de macrolepidópteros y plantas, los que se evalúan mediante modelos de regresión múltiple. Los resultados indican que los humedales con menor grado de perturbación antrópica se encuentran ubicados dentro de una reserva protegida y rodeados de una matriz de paisaje seminatural; mientras que los más perturbados están más próximos a la urbanización. Además, la riqueza de macrolepidópteros se ve más afectada por la distancia a carreteras, en cambio la riqueza de plantas por la densidad de viviendas. Se genera una herramienta para la evaluación de efectos de la urbanización en humedales urbanos.Palabras clave: Humedales, Urbanización, Biodiversidad, Naturalidad ABSTRACTUrbanization of the Metropolitan region of Concepción (36°S) in the last decades has impacted on the ecological value of areas such as wetlands and lagoons. Here, we analyse the disturbance to biodiversity indicators in six urban wetlands. Three measures are proposed: a naturalness indicator and two Macrolepidoptera plant indicators of species richness. Multiple regression models were developed for the assessment of indicators. Results show that the wetlands with the lowest degree of human interference are located in a protected area and surrounded by a matrix of semi-natural landscapes, whereas the more disturbed wetlands are those closer to areas of urbanization. Results indicate that macrolepidopterans richness is more affected by the distance to roads, in contrast with the richness of plants, which is affected by housing density. We generated a tool for the assessment of urbanization effects in urban wetlands.

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“…Finally, it should be noted that spatial analysis techniques have been used in many of the applications, in particular Geographical Information Systems (GIS) [30,31], which make it possible to integrate information generated from remote sensors, GPS, vectorial superposition, map algebra, field work, etc. Further examples may be found in [32], who used an indicator model with which they identified Drivers-Pressures-State-Impact-Responses (DPSIR) in the coastal zone of Granada (Spain) to explore the interactions and dependence of territorial dynamics in relation to the availability of water as a limiting resource.…”

Section: Geographical-environmental Perspective and Development Of Inmentioning

confidence: 99%

Territorial Planning for Coastal Zones in Chile: The Need for Geographical-Environmental and Natural Risk Indicators for Spatial Decision Support Systems

Peña‒Cortés¹,

Rozas-Vásquez²,

Rebolledo³

et al. 2013

IJG

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Coastal zones are very dynamic and fragile environments, constituting a landscape ever more heterogeneous, fragmented and with increasing levels of complexity due to the changing relationship between man and nature. Integrated coastal zone management therefore requires detailed knowledge of the system and its components, based-to a large extent-on technical and scientific information. However, the information generated must be in line with the political requirements necessary for decision-making and planning. Thus the use of indicators to give a simplified view of the many components of the territory, and at the same time to provide important information about patterns or trends, becomes a tool of the utmost importance. These indicators can be understood as measurable characteristics of the environment, which facilitate comprehension of the processes occurring at different scales and serve as a reference to inform the population and support decision-making. The aim of the present note is to demonstrate briefly the need to develop geographical-environmental and natural risk indicators to facilitate comprehension of the dynamic of spatial and temporal landscape patterns, particularly in coastal environments. This approach offers an historical summary of the natural, socio-economic and political processes which currently make up the territory, and which without doubt will continue to influence it in the future. At the same time, it is proposed that information should be integrated on the basis of this framework with a view to generating spatial decision support systems in a context of planning and integrated management of the coastal zones of Chile.

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Strategic Environmental Assessment in Latin America: A methodological proposal for urban planning in the Metropolitan Area of Concepción (Chile)

Cited by 42 publications

References 31 publications

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)

Patrones de urbanización en la biodiversidad de humedales urbanos en Concepción metropolitano

Territorial Planning for Coastal Zones in Chile: The Need for Geographical-Environmental and Natural Risk Indicators for Spatial Decision Support Systems

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Strategic Environmental Assessment in Latin America: A methodological proposal for urban planning in the Metropolitan Area of Concepción (Chile)

Cited by 42 publications

References 31 publications

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepci&#243;n Metropolitan Area (Chile)

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepci&#243;n Metropolitan Area (Chile)

Patrones de urbanización en la biodiversidad de humedales urbanos en Concepción metropolitano

Territorial Planning for Coastal Zones in Chile: The Need for Geographical-Environmental and Natural Risk Indicators for Spatial Decision Support Systems

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Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form: Analysis of the Concepción Metropolitan Area (Chile)