Diagnostic of ribeirão Mestre d’Armas sub-basin using two methods of rapid environmental assessment, Federal District, Central Brazil

  • Claudia Padovesi-Fonseca Universidade de Brasília
  • Ana Carolina Gomes Corrêa Universidade de Brasília
  • Gustavo Figueiredo Marques Leite Universidade de Brasília
  • Julio Cesar Joveli Universidade de Brasília
  • Luciano Soares Costa Universidade de Brasília
  • Sergio Toledo Pereira Universidade de Brasília
Keywords: watershed, environmental zoning, anthropogenic impacts, environmental assessment, protocols

Abstract

Rapid environmental assessments have been used to describe the quality and semi-quantitative attributes of the ecosystems along an environmental gradient using visual observations and few measurements. The aim of this study was to identify and measure anthropogenic impacts on ribeirão Mestre d’Armas sub-basin, Federal District, Central Brazil, and to propose its environmental zoning. This study was performed using two methods based on rapid environmental assessment: a rapid river assessment protocol, to evaluate in an integrated form the features of a lotic system section according to the conservation or degradation condition of the fluvial environment; and the Leopold matrix, to identify and evaluate the anthropogenic impacts. The environmental zoning of this sub-basin detected three areas: preserved, transition and urban areas. The environmental assessment revealed, the preserved area had lotic stretches with natural features under low magnitude of impacts, except on burned areas. In the transition area, there was a predominance of lotic stretches with altered features, due to agriculture and livestock activities of intermediate level of impacts. Finally, the urban area had altered and impacted lotic stretches of higher magnitude due to anthropogenic impacts. Thus, this study revealed large differences among the areas detected by environmental zoning, according to the methods used. These methods were considered complementary in relation to environmental diagnostic of the ribeirão Mestre d’Armas sub-basin.

Author Biographies

Claudia Padovesi-Fonseca, Universidade de Brasília
Universidade de Brasília Instituto de Biologia Departamento de Ecologia
Ana Carolina Gomes Corrêa, Universidade de Brasília
Universidade de Brasília Pós-Graduação Em Ecologia
Gustavo Figueiredo Marques Leite, Universidade de Brasília
Universidade de Brasília Pós-Graduação Em Ecologia
Julio Cesar Joveli, Universidade de Brasília
Universidade de Brasília Pós-Graduação Em Ecologia
Luciano Soares Costa, Universidade de Brasília
Universidade de Brasília Pós-Graduação Em Ecologia
Sergio Toledo Pereira, Universidade de Brasília
Universidade de Brasília Pós-Graduação Em Ecologia
Published
29/04/2010
Section
Papers