Pasar al contenido principal

page search

Displaying 1177 - 1188 of 1509

Emergy-based evaluation of peri-urban ecosystem services

Journal Articles & Books
Diciembre, 2011
Global

Peri-urban areas are often characterized by valuable natural environments that provide essential life-support functions and ecosystem services for urban residents. Global environmental change has raised concerns over how urbanization and land use and land cover change affect ecosystem services. This study applied systems ecology theory and ecological energetic analysis to value the worth of natural environment and ecosystem services to a socioeconomic system. We begin with a general discussion of peri-urban areas and their ecosystem services.

Managing urban growth in a transforming China: Evidence from Beijing

Journal Articles & Books
Diciembre, 2011
China

Managing urban growth in the current rapid urbanization process has become a key issue for land use policy in transformation China. This paper maps and assesses the performance of urban containment strategies in China, looking at the case of Beijing over a 19-year period (1990–2009). The analysis shows that to a large extent containment strategies perform well in terms of concentrating urban growth in planned suburban areas and promoting compact development.

Future development of the Palestinian neighbourhoods in East Jerusalem: misuse of environmental concepts in land management

Journal Articles & Books
Diciembre, 2011

The urbanisation process in East Jerusalem has been described as a still process, in other words, a frozen or even rarely-developed process. This paper explores the Green and Open Landscape concept as one of the dominant factors described in the Jerusalem Master Plan. This factor is one that restrains urbanisation and hinders expansion of the Palestinian neighbourhoods in East Jerusalem. Both descriptive and comparative approaches were adopted to analyse and evaluate the historical development of green spaces and open landscape concepts in East Jerusalem.

Agricultural and green infrastructures: The role of non-urbanised areas for eco-sustainable planning in a metropolitan region

Journal Articles & Books
Diciembre, 2011
Italia

Non-Urbanised Areas (NUAs) are part of agricultural and green infrastructures that provide ecosystem services. Their role is fundamental for the minimization of urban pollution and adaptation to climate change. Like all natural ecosystems, NUAs are endangered by urban sprawl. The regulation of sprawl is a key issue for land-use planning. We propose a land use suitability strategy model to orient Land Uses of NUAs, based on integration of Land Cover Analysis (LCA) and Fragmentation Analysis (FA). With LCA the percentage of evapotranspiring surface is defined for each land use.

Exploring long-term land cover changes in an urban region of southern Europe

Journal Articles & Books
Diciembre, 2011
Italia
Europa

This paper addresses two important issues for large Mediterranean city regions: the differential impact of compact urban ‘growth’ and low-density ‘sprawl’ on land cover changes (LCCs), and their final effect on changing land cover relationships (LCRs). The urban expansion of Rome (Italy) during the last 50 years and the related LCCs were investigated as a paradigmatic example of compact versus dispersed urban development.

Mediterranean water resources in a global change scenario

Journal Articles & Books
Diciembre, 2011
Europa
África septentrional

Mediterranean areas of both southern Europe and North Africa are subject to dramatic changes that will affect the sustainability, quantity, quality, and management of water resources. Most climate models forecast an increase in temperature and a decrease in precipitation at the end of the 21st century. This will enhance stress on natural forests and shrubs, and will result in more water consumption, evapotranspiration, and probably interception, which will affect the surface water balance and the partitioning of precipitation between evapotranspiration, runoff, and groundwater flow.

integrated approach to assessing multiple stressors for coastal Lake Superior

Journal Articles & Books
Diciembre, 2011

Biological indicators can be used both to estimate ecological condition and to suggest plausible causes of ecosystem degradation across the U.S. Great Lakes coastal region. Here we use data on breeding bird, diatom, fish, invertebrate, and wetland plant communities to develop robust indicators of ecological condition of the U.S. Lake Superior coastal zone. Sites were selected as part of a larger, stratified random design for the entire U.S. Great Lakes coastal region, covering gradients of anthropogenic stress defined by over 200 stressor variables (e.g.

Effects of spatial resolution of remotely sensed data on estimating urban impervious surfaces

Journal Articles & Books
Diciembre, 2011
China

Impervious surfaces are the result of urbanization that can be explicitly quantified, managed and controlled at each stage of land development. It is a very useful environmental indicator that can be used to measure the impacts of urbanization on surface runoif, water quality, air quality, biodiversity and microclimate. Therefore, accurate estimation of impervious surfaces is critical for urban environmental monitoring, land management, decision-making and urban planning.

Landscape valuation and planning

Journal Articles & Books
Diciembre, 2011

Landscape provides amenities and supports recreational, residential and productive activities. It appears both as an economic resource and as a local public good. Landscape economics uses both public economics and spatial economics concepts, but draws some specificity due to the social and cultural dimensions of landscapes. Moreover, it emphasises the role of the enforcement of property rights' devices on landscape dynamics. The latter is crucial for policy makers who have to deal with various topics such as urban sprawl, agriculture policy, territorial governance and local development.

Impact of urbanization and agriculture on the occurrence of bacterial pathogens and stx genes in coastal waterbodies of central California

Journal Articles & Books
Diciembre, 2011

Fecal pollution enters coastal waters through multiple routes, many of which originate from land-based activities. Runoff from pervious and impervious land surfaces transports pollutants from land to sea and can cause impairment of coastal ocean waters. To understand how land use practices and water characteristics influence concentrations of fecal indicator bacteria (FIB) and pathogens in natural waters, fourteen coastal streams, rivers, and tidal lagoons, surrounded by variable land use and animal densities, were sampled every six weeks over two years (2008 & 2009).

Effects of urbanization and industrialization on agricultural land use in Shandong Peninsula of China

Journal Articles & Books
Diciembre, 2011
China

China is the most populated country in the world with slightly more than half of the population is still living in rural areas. In the past couple of decades, rapid urbanization and industrialization have significantly changed the land use/land cover (LULC) pattern in rural areas, particularly those around the big cities in eastern China. Shandong Peninsula, a traditional agriculture area, also has witnessed rapid urbanization and industrialization.

Greenway Planning Context in Istanbul-Haliç: A Compulsory Intervention into the Historical Green Corridors of Golden Horn

Journal Articles & Books
Diciembre, 2011
Europa

In the last two decades, planners and landscape architects have been concerned with the open space planning concept called ‘greenway planning’. This approach aims at nature protection that balances both conservation and growth, creating livable environments and maintaining open spaces. In Istanbul, the functional and spatial connectivity of greenways can protect the local landscape against urbanization and population growth problems. This study aimed to emphasize the natural and cultural heritage in an ecologically based planning approach.