Changes in Rural Areas of the City of Carazinho (RS) between 2001 and 2020: A Temporal Analysis Using Landsat TM-7 and TM-8 Images

The analysis of satellite images is of fundamental importance in relation to understanding the evolution in land use.The general objective of this study is to analyze the changes in characteristics of rural land use in the municipality of Carazinho(RS)from 2001 to 2020 through the analysis of images taken from the Landsat TM-7 and TM-8 satellites.The TM-7 and TM-8 satellite images were classified and supervised,thus generation thematic maps with the following groups:tillage,forest,water resources and exposed soil.The analysis of this study showed that in 2001 the tillage group had an area of 10,651.6 ha,the forest group had an area of 7,248.03 ha,the water resources group occupied an area of 1,444.96 ha,and the exposed soil group occupied an area of 6,798.75 ha.When using the images taken in 2020,the same area presented the following data:the tillage group with an area of 15,941.5 ha.(60.95%),the forest group with an area of 4,320.99 ha(16.52%),water resources group with an area of 141.02 ha(0.53%),and the exposed soil group with an area of 5,747.22 ha(21.97%).The results demonstrate changes in land use during the study period,mainly with regard to the increase of cultivation areas and,consequently,the suppression of vegetation.

Sustainable Urbanization in a Medium-Sized City in Southern Brazil

Urbanization in Brazil is increasing,mainly in medium-sized cities.This expansion causes varying degrees of environmental impact.The general objective of this manuscript is to analyze the resultant impacts that urbanization has had on soil morphology in and around developing areas of the Brazilian city of Passo Fundo/RS.Implementation of the methodology laid out in the Leopold Matrix allowed the location of data for the analysis of the characteristics present in the use of the soil of the study area.Results showed high levels of vegetative loss around the City of Passo Fundo,due to a high degree of urban expansion driven by real estate speculation.The research suggests monitoring the degree of pollution of water resources in addition to regional air quality due to the marked intensity of vehicular flow.

Geoctenologies Applied to Evolution in Urban Design in a City in Southern Brazil

The evolution process of urban design is the result of transformations due to population increase along the expansion of cities on a global scale.Geotechnologies applied to forms of mapping make it possible to understand the changes that have occurred in urban spaces in relation to temporal space.The general objective of this study is to analyze the change that occurred from the year 2010 to 2021,in the evolution of urban design,in the city of Marau(southern Brazil).The identification of urban evolution in the years 2010 and 2021 was carried out.These data were modeled using the QGIS software,in the SIRGAS(Geocentric Reference System for the Americas)database,related to the evolution of urban design in Marau.The results demonstrate the need to apply geotechnologies not only in the city of Marau,but in other cities worldwide,because city halls need precision maps,avoiding the fragmentation of the urban fabric,a result of population expansion not projected in the built environment.