title: Assessment of aquatic plants in the reservoirs of AES-tietê and development of an integrated control model for the most important species.
abstract: The general objective of this work was to develop a monitoring and management model for aquatic plants that could be used in reservoir cascades in Brazil, using the reservoirs of AES-Tietê as a study case. The investigations were carried out at the reservoirs of Barra-Bonita, Bariri, Ibitinga, Promissão, and Nova-Avanhandava, located in the Tietê River Basin; Agua Vermelha, located in the Grande River Basin; Caconde, Limoeiro, and Euclides da Cunha, which are part of the Pardo River Basin; and the Mogi-Guaçu reservoir, which belongs to the Mogi-Guaçu River basin. The main products of this work were: development of techniques using satellite-generated images for monitoring and planning aquatic plant control; planning and construction of a boat to move coating plant masses and an airboat equipped with a DGPS navigation and application flow control system. Results allowed to conclude that the occurrence of all types of aquatic plants is directly associated with sedimentation process and, consequently, with nutrient and light availability. Reservoirs placed at the beginning of cascades are more subject to sedimentation and occurrence of marginal, floating and emerged plants, and are the priority when it comes to controlling these plants, since they provide a supply of weeds for the other reservoirs. Reservoirs placed downstream show smaller amounts of water-suspended solids, with greater transmission of light and occurrence of submerged plants.
authors.affiliation: Faculdade de Ciências Agronômicas, Universidade do Estado de São Paulo--UNESP, Campus de Botucatu, São Paulo, Brazil. velini@fca.unesp.br
authors.forename: Edivaldo Domingues
authors.initials: ED
authors.lastname: Velini
authors.forename: Maria Lourdes B T
authors.initials: ML
authors.lastname: Galo
authors.forename: Fernando Tadeu
authors.initials: FT
authors.lastname: Carvalho
authors.forename: Dagoberto
authors.initials: D
authors.lastname: Martins
authors.forename: Anderson Luis
authors.initials: AL
authors.lastname: Cavenaghi
authors.forename: Maria Lúcia Bueno
authors.initials: ML
authors.lastname: Trindade
authors.forename: Luis Fernando N
authors.initials: LF
authors.lastname: Bravin
authors.forename: Eduardo
authors.initials: E
authors.lastname: Negrisoli
authors.forename: Ulisses Rocha
authors.initials: UR
authors.lastname: Antuniassi
authors.forename: José L A
authors.initials: JL
authors.lastname: Simionato
authors.forename: Silvio C A
authors.initials: SC
authors.lastname: Santos
mesh_terms: D001938:Brazil; D003625:Data Collection; D004784:Environmental Monitoring; D040362:Geographic Information Systems; D019015:Geologic Sediments; D008027:Light; D010571:Pest Control; D063245:Plant Development; D018531:Spacecraft; D014872:Water Movements; D014881:Water Supply