@Article{AlcântaraCurOgaSteSou:2013:SyEnMo,
               author = "Alc{\^a}ntara, Enner and Curtarelli, Marcelo Pedroso and 
                         Ogashawara, Igor and Stech, Jos{\'e} Luiz and Souza, Arley",
          affiliation = "UNESP - Universidade Estadual Paulista, Presidente Prudente, SP, 
                         Brasil and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "A system for environmental monitoring of hydroelectric reservoirs 
                         in Brazil",
              journal = "Revista Ambiente \& {\'A}gua",
                 year = "2013",
               volume = "8",
               number = "1",
                pages = "6--17",
             keywords = "environmental monitoring, database, time series, reservoirs.",
             abstract = "Environmental monitoring of aquatic systems is an important tool 
                         to support policy makers and environmental managers decisions. 
                         Long-term, continuous collection of environmental data is 
                         fundamental to the understanding of an aquatic system. This paper 
                         aims to present the integrated system for environmental monitoring 
                         (SIMA), a long-term temporal series system with a web-based 
                         archive for limnological and meteorological data. The following 
                         environmental parameters are measured by SIMA: chlorophyll-a 
                         (ugL-1), water surface temperature (șC), water column temperature 
                         by a thermistor string (șC), turbidity (NTU), pH, dissolved oxygen 
                         concentration (mg L-1), electric conductivity (”S cm-1), wind 
                         speed (ms-1) and direction (ș), relative humidity (%), shortwave 
                         radiation (Wm-2) and barometric pressure (hPa). The data were 
                         collected in a preprogrammed time interval (1 hour) and were 
                         transmitted by satellite in quasi-real time for any user within 
                         2500 km of the acquisition point. So far, 11 hydroelectric 
                         reservoirs are being monitored with the SIMA buoy. Basic 
                         statistics (mean and standard deviation) and an example of the 
                         temporal series of some parameters were displayed at a database 
                         with web access. However, sensor and satellite problems occurred 
                         due to the high data acquisition frequency. Sensors problems 
                         occurred due to the environmental characteristics of each aquatic 
                         system. Water quality sensors rapidly degrade in acidic waters, 
                         rendering the collected data invalid. Data is also rendered 
                         invalid when sensors become infested with periphyton. Problems 
                         occur with the satellites reception of system data when satellites 
                         pass over the buoy antenna. However, the data transfer at some 
                         inland locations was not completed due to the satellite 
                         constellation position. Nevertheless, the integrated system of 
                         water quality and meteorological parameters is an important tool 
                         in understanding the aquatic system dynamic. It can also be used 
                         to create hydrodynamics models of the aquatic system to allow for 
                         the study of meteorological implications to the water body.",
                  doi = "10.4136/ambi-agua.1088",
                  url = "http://dx.doi.org/10.4136/ambi-agua.1088",
                 issn = "1980-993X",
                label = "lattes: 2691497637313274 4 
                         Alc{\^a}ntaraCurOgaSteSou:2013:SyEnMo",
             language = "pt",
           targetfile = "1088-6211-1-PB.pdf",
                  url = "http://dx.doi.org/10.4136/ambi-agua.1088",
        urlaccessdate = "27 abr. 2024"
}