Characterization of aquatic environments in the De Ondas River, Bahian Cerrado

  • Elis Regina Rodrigues de Souza Castro Universidade Federal do Oeste da Bahia
  • Michel Castro Moreira Universidade Federal do Oeste da Bahia
  • Luís Gomes Carvalho Universidade Federal do Oeste da Bahia
  • Demetrius David da Silva Universidade Federal de Viçosa
Keywords: ADCP, aquatic biota, granulometry, topobathymetry

Abstract

This work sought to characterize the types of environments present in the De Ondas River, with the aim of obtaining information on their structural complexity and supporting public policies for water resource management that will allow the shared water use and will protect the biodiversity of the river basin. The De Ondas River watershed is located in the Cerrado Region, in the western part of Bahia State, and covers an area of 5.559 km². In order to perform the characterization, two stretches were demarcated, one in the upper part of the basin and another in the lower. Afterwards, a topobathymetric survey was conducted, and characterizations of the bottom and of hydraulic properties were done for both the rainy and dry seasons. The topobathymetric survey in the upper course showed altitudes ranging from 699.82 m to 714.06, whereas in the lower course these varied from 439.45 m to 446.91 m. Bathymetric profiles allowed the visualization of the structure and distribution of the bottom of the channel environments. The granulometric analysis of the higher part of the basin showed that sand was predominant (88.94%), while in the lower part boulders (76.9%) and cobble (23.1%) predominated. In the higher part of the basin, the water flow varied from 5.20 m³s-1 (dry period) to 9.07 m³s-1 (rainy period); and in the lower part, from 25.73 m³s-1 (dry period) to 66.44 m³s-1 (rainy period). The complexity of the environments of these stretches favors biological diversity in the river, resulting in different environments that aid aquatic species in adapting to the channel structure. The study of the physical characteristics of the De Ondas River produced a great amount of information regarding the micro-environments of the stretches examined, and will support studies related to aquatic biota and water resource management.

Author Biographies

Elis Regina Rodrigues de Souza Castro, Universidade Federal do Oeste da Bahia
Graduated in Biology from the Catholic University of Goiás (2006) and a Masters in Environmental Sciences from the Federal University of Bahia (2013). She is currently a substitute teacher at the Federal University of the West of Bahia (UFOB) in Barriers. Has experience in fish community analysis, water resources management, environmental education and ecological flows.
Michel Castro Moreira, Universidade Federal do Oeste da Bahia
Has the Federal University of Viçosa titles degree in Computer Science (2003), master's (2006) and Ph.D. (2010) in Agricultural Engineering. He is currently professor at the Federal University of the West of Bahia (UFOB) in Barriers. He has experience in the development of computer systems, with emphasis on integrated planning of water resources and artificial neural networks, mainly in the following topics: information on water resources, water availability, ecological flows and grant system.
Luís Gomes Carvalho, Universidade Federal do Oeste da Bahia
He holds degrees in Geology from the Federal Rural University of Rio de Janeiro (2001) and master's degree in Geosciences from the State University of Campinas (2005). He is currently Assistant Professor of Surveying Center of Exact Sciences and Technology, Federal University of Western Bahia. Has experience in Geosciences with an emphasis on Surveying, Geodesy, Geotechnics and Hydrogeology.
Demetrius David da Silva, Universidade Federal de Viçosa
Professor and current Vice-Chancellor of the Federal University of Viçosa (UFV), managed 06 / 2011-06 / 2015. Scholar of Research Productivity CNPq, level 1A. Chairman of the Board of Directors of the Technology Center of Regional Development of Viçosa (CenTev). Member of the Scientific Council of the International Centre for Education, Training and Applied Research in Water Foundation (HIDROEX UNESCO), as a representative of the faculty of universities recognized by the Ministry of Education. CEO of Arthur Bernardes Foundation (FUNARBE), managements 08 / 2006-07 / 2010 and 08 / 2010-05 / 2011. Head of Department of Agricultural Engineering, UFV, in the periods of 2004-2006 and 2002/2004. Graduated in Agronomy (1987), master's (1990) and Ph.D. (1994) in Agricultural Engineering from the Federal University of Viçosa. He has experience in Agricultural Engineering with emphasis in Planning and Management of Water and Soil Conservation and Water Resources, acting on the following themes: water resources management, ecohidrológica modeling, runoff, erosion and hydrologic modeling.
Published
08/12/2014
Section
Papers