ANALYSIS OF THE ECO-DYNAMIC STABILITY AND ENVIRONMENTAL FRAGILITY OF RIO CABAÇAL BASIN, MATO GROSSO STATE (MT), BRAZIL

Thiziane Helen Lorenzon,Edinéia Aparecida Dos Santos Galvanin,Jesã Pereira Kreitlow,Sandra Mara Alves Da Silva Neves,Luiz Carlos Machado De Souza Filho

doi:10.5016/geografia.v42i3.13087

Thiziane Helen Lorenzon, Edinéia Aparecida Dos Santos Galvanin + Show 3 more

Open Access

https://doi.org/10.5016/geografia.v42i3.13087

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Abstract

Environmental planning studies are important tools used for the conservation of natural landscapes. The objective of this study was to evaluate the eco-dynamic stability and environmental fragility of the Cabaçal river basin, Mato Grosso State. The methodology of empirical analysis from the environmental fragility proposed by ROSS (1994) was applied, using geo-technologies for mapping the index of relief dissection, soils, land use/land vegetation cover, and climate. Approximately 60% of the area from the basin under study presents unstable eco-dynamic units. The Rio dos Bugres subbasin is the unit with the greatest landscape instability (74.39%). The Rio Branco subbasin has the highest areal percentage of class Strong fragility (20.38%). It is concluded that most of the extension of the Cabaçal River basin presents a high fragility and unstable eco-dynamic units which can compromise the environment in this importante unit of the Upper Paraguay Basin and the Pantanal biome

Highlights

The eco-geodynamic interactions have been affected by anthropic interference that causes changes in the natural components and in the equilibrium state of its components
The evaluation of the natural potential fragility is related to the natural landscape factors (SILVEIRA; OKA-FIOR, 2007, p.2), which according to Donha et al (2006, p. 176) “should be evaluated in an integrated form, considering always the anthropogenic interventions modifying the natural environments”
The adoption of a river basin as a basic management and planning field has been practiced by several authors (LUCIANO et al, 2014; SILVA et al, 2014) because it reflects better the geo-environmental characteristics and the changes resulting from anthropic uses

Summary

Introduction

The eco-geodynamic interactions have been affected by anthropic interference that causes changes in the natural components and in the equilibrium state of its components. The study of changes in landscape elements such as geomorphology, land use, pedology, and pluviometric behavior are an alternative of broad application for the evaluation of environmental fragility. In this sense, the evaluation of the natural potential fragility is related to the natural landscape factors (SILVEIRA; OKA-FIOR, 2007, p.2), which according to Donha et al 176) “should be evaluated in an integrated form, considering always the anthropogenic interventions modifying the natural environments” Based on this assumption, the use of geo-technologies for the identification of environmental landscape change is an adequate recognition of the dynamics from the environment, enhancing the need of natural resources management and facilitating its historical evaluation (MARTINS; SILVA, 2007). River basins confer an undeniable unit for studies of environmental fragility because they express subtle changes in their equilibrium

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