Sea-land limits: a case study

Anais da Academia Brasileira de Ciências

Afranio R. De Mesquita²  Denizar Blitzkow¹  Carlos A. S. França²  Jorge L. A. Trabanco²  Marco A. Corrêa²  Mauro Q. Monteiro² 

[1] ,USP Instituto Oceanográfico São Paulo SP ,Brasil

关键词: Relative Sea Level;    Brazilian law;    Sea-Land Limits;    "Pulso" beach;    geodetic leveling;    Southeastern Brazilian shelf;    global warming;    sea level rise;    nível relativo do mar;    Lei Brasileira;    Terrenos de Marinha;    praia do Pulso;    nivelamento geodésico;    área costeira sudeste;    aquecimento global;    aumento do nível do mar;   

DOI  :  10.1590/S0001-37652011000400009

来源: SciELO

【 摘 要 】

The limits between sea and land were estimated at "Pulso" beach located in the Southeastern Brazilian shelf (φ = 23°33/17.4886"S; Λ = 045° 13'13.0504"W - WGS84), between the island of São Sebastião and the city of Ubatuba, SP, Brazil. The relative sea level of the year 1831 at "Pulso" beach, as per Brazilian law Number 9760 dated from 1946, was estimated and materialized. The retro-estimation allowed the demarcation of the Legal Sea-Land Limits at "Pulso" beach as per the terms of the law. The accuracy of the procedure for the transference of the long-term sea level from the research station of Ubatuba to "Pulso" beach was assessed by parallel work of geometrical leveling referred to the IBGE (Brazilian Institute of Geography and Statistics) geodetic network. The motivation, the hypotheses (Brest, Cananeia and IPCC) and the methods here used are described, together with a short history of the Legal Sea-Land Limits. The results indicated that the legal Sea-Land Limits at "Pulso" beach are well within the beach area. They were determined as per law 9760, and there is the need to reactivate the national network of sea level gauge.

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