Variação sazonal das variáveis físicas e químicas em riachos de duas bacias da região centro-sul do estado do Paraná, sul do Brasil

• Autor(a) principal: Krupek, Rogério Antônio
• Data de Publicação: 2010
• Outros Autores: Branco, Ciro Cesar Zanini [UNESP], Peres, Cleto Kaveski [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://revistas.unicentro.br/index.php/ambiencia/article/view/355; http://hdl.handle.net/11449/126977
• topic: Drainage basin; Streams; Seasonal variation; Physical and chemical variables; Paraná state; Bacia de drenagem; Riachos; Variação sazonal; Variáveis físicas e químicas; Estado do Paraná

The present study was developed in two streams from the two different drainage basins located in the mid-southern region of Paraná state. In each stream were evaluated some physical and chemical parameters in open (without streamside vegetation) and shaded (with streamside vegetation) segments. Monthly samplings were carried out from January to December 2007. The following limnological parameters were measured: water temperature, specific conductance, oxygen saturation, pH, turbidity and current velocity. In the same stream were not observed differences among segments from the drainage basins, and nominal values and seasonal pattern have been very similar between open and shaded ambient. A Principal Component Analysis (PCA) showed small divergence between streams and segments, with separation of groups with base sampling dates. The results suggest that the region is homogeneous according to physical and chemical water conditions, therefore, stronger influenced for time factor, and diverging seasonal periods associated a climatic region condition.