From a water resource to a point pollution source: the daily journey of a coastal urban stream

Brazilian Journal of Biology

Lr. Rörig²  Jg. Tundisi¹  Caf. Schettini²  J. Pereira-filho²  Jt. Menezes²  Tcm. Almeida²  Sr. Urban²  Cm. Radetski²  Rc. Sperb²  Ca. Stramosk²  Rs. Macedo²  Ma. Castro-silva²  Jaa. Perez² 

[1],Universidade do Vale do Itajaí Centro de Ciências Tecnológicas, da Terra e do Mar Itajaí SC ,Brazil

关键词: urban streams;    runoff;    aquatic pollution;    ecotoxicology;    Santa Catarina;    córregos urbanos;    escoamento superficial;    poluição aquática;    ecotoxicologia;    Santa Catarina;   

DOI  :  10.1590/S1519-69842007000400003

来源: SciELO

【 摘 要 】

The aim of this study was to understand how a stream ecosystem that flows from its fountainhead to its mouth inside a city, changes from a water resource to a point pollution source. A multidisciplinary descriptive approach was adopted, including the short-term temporal and spatial determination of physical, chemical, biological and ecotoxicological variables. Results showed that water quality rapidly decreases with increasing urbanization, leading the system to acquire raw sewage attributes even in the first hundred meters after the fountainheads. Despite the tidal circulation near the stream mouth being restricted by shallowness, some improvement of the water quality was detected in this area. The multidisciplinary evaluation showed to be useful for obtaining a more realistic understanding of the stream degradation process, and to forecast restoration and mitigation measures.

【 授权许可】

CC BY   
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