%0 Journal Article
%T Morfodin¨¢mica de playas del sudeste de la provincia de Buenos Aires (1983 a 2004)
%A Bertola
%A Germ¨¢n R.
%J Latin American journal of sedimentology and basin analysis
%D 2006
%I Scientific Electronic Library Online
%X along the coast of the southeastern buenos aires province (fig. 1), there are two important geomorphologic relieves: low sandy beaches with dune fields, and pocket beaches located between loessic or quarcitic cliffs. to the north and south of mar del plata city, extense dune fields conform the eastern and southern barriers. these dune fields are very modern, since they have been formed as consequence of a holocene sea-level fluctuation (schnack et al., 1982; violante and parker 1993; isla, 1997). the objective of the study was to analyse the natural and artificial morphological changes of the beaches of pinamar, villa gesell, mar chiquita, general pueyrred¨®n, general alvarado, lober¨ªa and necochea counties, and the description and discussion of results obtained from 1983 to 2004. special emphasis was made to the sedimentary dynamics of these beaches and the changes induced by man-made structures (groynes fields) and sand mining. the beaches have different orientation, dynamics, grain size, as well as different human alteration degree. the work was based on the comparison of beach profiles according to conventional methods (fox and davis, 1978; isla, 1992; isla et al., 1994; b¨¦rtola, 2001), the evaluation of the morphological classification based on dean's number (dean, 1973), omega parameter (masselink and short, 1993), battje¡äs number (short, 1996), and the parameter of guza and inman (1975). surface grain sizes were analysed using the parameters of folk and ward (1957) and evaluating beach slope changes. north area morphology: these are oceanic beaches, with average width of 72 m., the berm remains stabilised or it is in setback. berm width increases at the touristic area in mar de las pampas. villa gesell beaches (spa los hist¨®ricos) suffered significant variations. in the pristine areas, there is presence of dunes after the backshore, although many of them are forested. balance: in this area, there are no structures or estuaries that could affect the littoral dr
%K playas
%K morfolog¨ªa
%K din¨¢mica
%K buenos aires.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S1851-49792006000100002&lng=en&nrm=iso&tlng=en