INVESTIGADORES
LARA Ruben Jose
capítulos de libros
Título:
Analysis of Mangrove Inundation by GIS Techniques
Autor/es:
COHEN, MARCELO; LARA, RUBÉN JOSÉ; SZLAFSZTEIN, C.F.; DITTTMAR, THORSTEN
Libro:
Sustainable use of Estuaries and Mangroves
Editorial:
Universidade Federal do Pernambuco
Referencias:
Lugar: Recife; Año: 2000; p. 73 - 78
Resumen:
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0pt;
margin-bottom:.0001pt;
mso-pagination:none;
text-autospace:none;
font-size:12.0pt;
mso-bidi-font-size:10.0pt;
font-family:Arial;
mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";
mso-ansi-language:EN-GB;
mso-fareast-language:PT-BR;}
p.MsoBodyText, li.MsoBodyText, div.MsoBodyText
{margin:0pt;
margin-bottom:.0001pt;
text-align:justify;
mso-pagination:none;
text-autospace:none;
font-size:12.0pt;
mso-bidi-font-size:10.0pt;
font-family:Arial;
mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";
mso-ansi-language:EN-GB;
mso-fareast-language:PT-BR;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;
mso-header-margin:36.0pt;
mso-footer-margin:36.0pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
Geographical surface data
models can be created by GIS methods, which are computer-based tools for
processing and displaying spatial or geo-referenced information. GIS techniques
were used to process and visualise topography and tidal regime data, focusing
on the inundation of a mangrove ecosystem (bragança,
north brazil). As part of the
MADAM Project, a 1:1000 topographical map covering about 4 ha near the Furo do
Chato tidal creek was produced. Contour levels were regularly spaced at 1 m
intervals between 0 and 6m, relative to the bottom of the creek at the sampling
site. Due to the smooth topographical gradients found in these mangroves, this
site can be considered representative of the Bragança mangrove topography.
Another topographical map of the whole peninsula was prepared using simple
devices for measuring tide elevation simultaneously at several location in an
area of ~190 km2. During average neap and spring tides, ~70%
and ~90% of the mangrove is flooded, respectively. The topographical features
of the study area cause that small water level variations can produce significant
changes in the inundation area. The used model approach realistically reflects
geomorphology-dependent processes. It
showed relationships between vegetation assemblages and topographically defined
habitats, providing numerical basis for the evaluation of vegetation
distribution patterns and nutrients dynamics in well-defined catchment areas.
Further, it provided a link to sediment-water interactions not previously
evaluated in our own investigations on creek water chemistry.
