Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-06-01T19:57:23Z No. of bitstreams: 1 1991 - Terezinha Aldenora de Castro e Almeida Magalh?es.pdf: 8001622 bytes, checksum: 773c2d35c4e20e65c38f62e40caa36dc (MD5) / Made available in DSpace on 2017-06-01T19:57:23Z (GMT). No. of bitstreams: 1 1991 - Terezinha Aldenora de Castro e Almeida Magalh?es.pdf: 8001622 bytes, checksum: 773c2d35c4e20e65c38f62e40caa36dc (MD5) Previous issue date: 1991-03-26 / The area studied is located in the state of Rio de Janeiro, Brazil, including the drainage basin of Una River and part of the drainage basin of Sao Jo?o River. There were mapped the soils, the agricultural suitability of lands and class of lands for irrigation, based on preexisting soil surveys, modified and detailed. This paper comprises also the aerial photograph interpretation concerning the soil survey of the coastland region, the land-use mapping and the proposal of a new methodology for the evaluation of land-use distortions accompanied by the corresponding mapping. It is concluded that: 1) In most scanned districts the amount of overused land is not significant; 2) the steady state prevails in the district of Cabo Frio lands, but it is also significant in the districts of Araruama and S?o Pedro d'Aldeia; 3) there is a prevalence of underused land in the districts of Casimiro de Abreu, Rio Bonito and Araruama. The adoption of management practices according to the orientation of the present study, as well as the reorganization of aims of agricultural exploitation and potential, shall be of use in relieving social and environmental tensions pre-existing in the studied region and in promoting its self-sustainable development. / A ?rea estudada situa-se no estado do Rio de Janeiro _ Brasil, compreendendo a bacia de drenagem do rio Una e parte da bacia de drenagem do rio s?o Jo?o. No presente estudo s?o apresentados mapeamentos de Solos, Aptid?o agr?cola e irriga??o, baseados em levantamentos pr?-existentes, com modifica??es e detalhamento; ? apresentada aerofotointerpreta??o com fins de Levantamento de solos da zona litor?nea, in?dita; ? apresentado mapeamento de Uso da Terra utilizando metodologia in?dita; ? proposta metodologia in?dita de avalia??o das Distor??es de Uso da Terra, com o mapeamento correspondente. Concluiu-se que: 1) Na maioria dos munic?pios abrangidos pelo estudo, as terras sobre-utilizadas n?o s?o significativas; 2) As terras em equil?brio s?o predominantes somente no munic?pio de Cabo Frio, apesar de terem percentual significativo tamb?m nos munic?pios de Araruama e s?o Pedro d'Aldeia; 3) As terras subutilizadas predominam nos munic?pios de Casemiro de Abreu, Rio Bonito e Araruama; 4) A ado??o dos sistemas de manejo adequados ?s condi??es ambientais, conforme a orienta??o do presente estudo e o redirecionamento da explora??o agropecu?ria para adequ?-la ao afetivo potencial de explora??o econ?mica dessas terras, poder?o aliviar tens?es sociais e ambientais j? existentes na regi?o, e promover seu desenvolvimento sustent?vel