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urban settlement Spatial Analysis in Permanent Preservation Area of M’boicy Watershed River, Foz do Iguaçu City in Brazil

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International Journal of Geosciences 2016年第10期7卷 1222-1231页

作者： Luis Henrique Weiss de Carvalho Sandro Laudares Matheus Pereira Libório Marianna Petrovna Ekel Renato de Oliveira Marques Geoprocessing GeoInnovit Solucoes Tecnológicas Foz do Iguacu Brazil Department of Geoghaphy Pontifical Catholic University of Minas Gerais Belo Horizonte Brazil Department of Distance Learning Pontifical Catholic University of Minas Gerais Belo Horizonte Brazil Research Support Foundation of Minas Gerais Belo Horizonte Brazil

Irregular urban settlement increases environmental impacts, especially when these occupations occur in fragile location, as the environmental preservation areas. In these areas, also defined as Permanent Preservation Area (PPA), the presence of watersheds is common, which is the factor that increases the need of protecting them from anthropic actions. Those actions deteriorate the environment and mainly the watercourses. This research objective is to identify and estimate the environmental risks of M’Boyci watershed River PPA occupied areas by urban population. The risk analysis approach, at this PPA in Foz do Iguacu City in Brazil, is able to support public interventions in order to reestablish the PPA natural conditions. To reach this goal, it was necessary to use cartographical representation images, generated from digital orthophotos analyzed through free geographical information systems. The overlap and the contrast of geographical data related to preservation in urban areas show that urban occupation reaches almost 40% of the permanent preservation area. Complementarily, it is evidenced that the development of a risk map identifies PPA areas characterized by a greater concentration of irregular settlement, contributing to the planning process of residents, relocation actions and recovery of degraded areas.

关键词： urban settlement Permanent Preservation Areas Environmental Impact Spatial Analysis Geographical Information System

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Monitoring urban land cover and vegetation change by multi-temporal remote sensing information

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Mining Science and Technology 2010年第6期20卷 922-932页

作者： DU Peijun LI Xingli CAO Wen LUO Yan ZHANG Huapeng Department of Remote Sensing and Geographical Information Science China University of Mining & Technology Xuzhou 221116 China China Coal Research Institute Tangshan Branch Tangshan Hebei 063012 China

In order to analyze changes in human settlement in Xuzhou city during the past 20 years, changes in land cover and vegetation were investigated based on multi-temporal remote sensing Landsat TM images. We developed a hierarchical classifier system that uses different feature inputs for specific classes and conducted a classification post-processing approach to improve its accuracy. From our statistical analysis of changes in urban land cover from 1987 to 2007, we conclude that built-up land areas have obviously increased, while farmland has seen in a continuous loss due to urban growth and human activities. A NDVI difference approach was used to extract information on changes in vegetation. A false change information elimination approach was developed based on prior knowledge and statistical analysis. The areas of vegetation cover have been in continuous decline over the past 20 years, although some measures have been adopted to protect and maintain urban vegetation. Given the stability of underground coal exploitation since 1990s, urban growth has become the major driving force in vegetation loss, which is different from the vegetation change driven by coal exploitation mainly before 1990.

关键词： urban settlement land cover change vegetation hierarchical classifier system urbanization NDVI NDVI difference urban remote sensing

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Land Recycling,Food Security and Technosols

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Journal of Geographical Research 2021年第3期4卷 44-50页

作者： Teresa Rodríguez-Espinosa Jose Navarro-Pedreño Ignacio Gómez Lucas María Belén Almendro-Candel Department of Agrochemistry and Environment University Miguel Hernández of ElcheAvd.de la Universidad SN03202-ELCHEAlicanteSpain

The world population will grow up to 9.8 billion by *** intensification in urban growth will occur on all continents and in all sizes of cities,especially in developing countries,experiencing a greater rising in urban agglomerations of 300,000 to 500,000 people,those of 500,000 to 1 million and those of 1 to 5 million,by *** this way,the demand of soil to host human activities(land take)will increase,mainly affecting soils with greater agricultural potential close to cities,at the same time as the need for food will *** rehabilitation can contribute to human food security,to enhance ecosystem services and,if made by waste Technosols,those are viable as substrate for urban agroforestry *** the references for brownfield reclamation for urban agriculture,adding constructed Technosols and de-sealed soils can recover its ecosystem functions even food supply services and would be the solution in urban areas.

关键词： Brownfields Ecosystem services Land take Population growth Sealed soils urban settlement

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