Cartografia geomorfológica retrospectiva do sítio urbano de Cuiabá (MT)

Abstract

SANTOS -R. L. Retrospective Geomorphological Mapping of Cuiabá City (MT).Dissertação de Mestrado (Departament of Geography, FFLCH), University of São Paulo, São Paulo, 2018, 190p. + 3 attachments. This research analyzes the geomorphology of Cuiabá (MT) Urban Site and its surroundings. For that, a detailed geomorphological map of this area is presented in the 1: 50,000 scale, elaborated from documentary research, fieldwork, data analysis and laboratory treatment and, mainly, analysis and interpretation of aerial photographs. The study, developed according to the Anthropogeomorphology approach or Anthropogenic Geomorphology, emphasizes the application of retrospective geomorphological mapping. This cartographic approach deals with the pre-perturbation stage, corresponding to the original morphology, pretending to reconstruct the geomorphological systems prior to the different anthropic interventions.The mapping was based on a multiscale and systemic approach, which transited between the various elements of the slope, reaching the level up to the interflow, as well as the river channel and floodplain subsystems and their respective morphologies. The cartographic work consisted of two moments, the preliminary morphological cartography, followed by the verification and validation of the correlations between the morphological units ascertained in the field, including the integrate landforms materials.Punctual data resulting from the description of outcrops within the city and its surroundings were associated with available bibliographic information and laboratory analyzes. This set allowed the materials characterization the of the morphological units, as well as the correlation between the morphological map and the material information allowed to interpret the morphodynamics of these systems, oriented to possible spatial tendencies of current hydrogeomorphologic processes.With this, the second moment was reached, that of the final cartography, the geomorphological map. The geomorphological map and its analysis allowed to reconstruct and characterize the landforms of Cuiabá Urban Site, as well as the rescue of geomorphological systems in the antropic pre-perturbation stage. As a result of the research, the map of the original morphology of Cuiabá the urban site and its surroundings was produced, as well as its geomorphological map.Among the morphologies mapped and described, it was possible, for example, to identify basal morphologies in a crib with probable levels of exfiltration. This form possibly correlates with intra-formational lithologic and textural discontinuities which, in turn, may form part of an internal water circulation command.It is concluded that the retrospective geomorphological mapping is an important auxiliary instrument for the evaluation of the effects derived from anthropic action, mainly in the intervention modalities of high magnitude, to the example of urbanization.Therefore, it becomes indispensable for understanding the morphodynamics of undisturbed systems and for the basis of applied re...

Influence of Season, Environment, and Sex on Selected Blood Parameters of Geoffroy's Side-Necked Turtles, Phrynops Geoffroanus (Schweigger, 1812)

“…In the dry season, the average maximum temperatures reaches 41°C, with the medium rainfall index below 10 mm. 14,52 Rainfall is prevalent in summer, with about 70% of the average total between 2,000 and 3,000 mm of precipitation. During the rainy season, the monthly average air temperature is also high, and its amplitude during these months of the season is low.…”

A mineração e os limites geográficos na colonização de Cuiabá e Mato Grosso

“…A descoberta acidental de ouro no Córrego da Prainha, em 1722, por duas crianças indígenas escravizadas por Miguel Sutil de Oliveira [?-1764] que estavam buscando mel, foi responsável pela mudança do centro do arraial (Setúbal, 1954, Siqueira, 2009, Presotti, 2008. As "Lavras do Sutil", como ficaram conhecidas, representaram a maior descoberta aurífera até então e foram responsáveis pela migração à área onde se iniciou a urbanização de Cuiabá (Santos, 2018). O deslocamento em 1722 fez com que o antigo centro da vila, o Arraial da Forquilha, deixasse de existir em 1723.…”

“…Outras construções coloniais vizinhas apresentam elementos da geodiversidade local, sendo frequente a utilização de fragmentos de veios de quartzo, fonte primária do ouro em Cuiabá, como revestimento (Silva et al, 2002, Costa et al, 2021b. Em campo, nota-se ainda que os morros, especialmente os ocupados por igrejas jesuíticas, são geomorfologicamente estruturados por veios de quartzo auríferos, o que demonstra o poder do clero sobre a sociedade e seu papel gestor dos recursos minerais à época (Santos, 2018).…”

Morfologia Original do Sítio Urbano de Cuiabá (MT)

“…O segundo momento refere-se à intensa urbanização ocorrida na segunda metade do século XX (1970)(1971)(1972)(1973)(1974)(1975)(1976)(1977)(1978)(1979)(1980), como reflexo da ocupação da região Centro-Oeste decorrente da expansão da fronteira agrícola no Estado do Mato Grosso (VILARINHO NETO, 2002;BARRETO, 2007;VOLOCHKO, 2013). Nesse momento ocorreram obras de canalização, retificação, tamponamento de canais fluviais e supressão de planícies de inundação, juntamente com cortes de vertente e remobilização de material para aterros (SANTOS, 2018).…”

“…As couraças ferruginosas ocorrem principalmente em topos de interflúvios, conformando um aspecto horizontal ou sub-horizontal e podem apresentar veios/fragmentos de quartzo em sua composição. Além disso, terraços fluviais apresentam materiais da fração cascalho cimentados, e nesta situação identificaram-se camadas com mais de 3 metros de espessura (SANTOS, 2018).…”