Hidrografhy of the estuarine-lagunar complexo of Cananéia (25º S í  48º W), São Paulo, Brazil. I í  Salinity and temperature (1973 a 1980)

Authors

  • Motoi MISHIMA Biologista Seção de Maricultura - Divisão de Pesca Marí­­tima - Instituto de Pesca
  • Naoyo YAMANAKA Pesquisador Cientí­­fico - Seção de Maricultura-Divisão de Pesca Marí­­tima - Instituto de Pesca
  • Orlando Martins PEREIRA Pesquisador Cientí­­fico - Seção de Maricultura-Divisão de Pesca Marí­­tima - Instituto de Pesca
  • Francisco das CHAGAS SOARES Pesquisador Cientí­­fico - Seção de Maricultura-Divisão de Pesca Marí­­tima - Instituto de Pesca
  • Chossi SINQUE Pesquisador do Cientí­­fico de Biologia Marí­­tima - Universidade Federal do Paraná
  • Shizuo AKABOSHI Pesquisador Cientí­­fico da Universidade del Norte, Chile
  • Oseli JACOBSEN Pesquisador Cientí­­fico - Seção de Maricultura-Divisão de Pesca Marí­­tima - Instituto de Pesca

Keywords:

NíO CONSTA

Abstract

A global view of the estuarine lagunar system of Cananeia, regarding to mean values of surface salinity and temperature, is presented based on data collected in 18 stations from 1973 to 1980, at intervals of 3 days, approximately. Consequences of a dam, built in 1978 across Valo Grande, were considered. BEFORE dam building, the lowest salinities varied between 1O/oo and 23O/oo, and the highest, between 15O/oo and 33O/oo; AFTER dam building the lowest salinities were between 17O/oo and 23O/oo, and the highest, between 25O/oo and 35O/oo. The temperature varied from 23.3°C to 25°C BEFORE dam building, and from 23.8°C to 30.5°C AFTER. The salinity remained heterogeneous. In spite of the total reduction of the fresh water discharge from Rio Ribeira de Iguape, the system of Cananéia maintains estuarine characteristics due to its own hydrographic basin.

Published

2018-06-28