Quadros, Clécio José Lopes de 
Digital Elevation Model (m) 
F 1078-130 
[77] 1.39 - 2.00 
| 2.00 - 2.61 
2.61-322 
EN 322-3.85 
  
HIN EE NM GM 3N 
100 0 1000 m 
Figure 3. Digital elevation model map 
digital According to the map of geomorphological forms (Figure 4), the distribution of the area confers two 
plies a main zones of geomorphological forms, being one represented by dune ridges fields and inner ridges, and 
lane in another by the prairies that occur mostly at SW of the area. A third geomorphological form found, even thought 
"value in low quantity, are small swamp areas constantly flooded, distributed along the whole area. 
imetry, The ridges fields appear in the zone closest to the estuary, being these related to the great availability of 
plied a sediments found at this place due to the occurrence of an ebb tidal delta adjacent to the place. 
ic map Inside the fields are: a dune ridge frontal system and a system of inner ridges. The first one with 
-ontain physical contact with the sea. This zone is the one that suffers more transformation, because its morphology is 
clidean reworked several times by the waves and the wind, in a short period of time. The second represents a set of 
inner ridges and swales with parallel alignment to the coastline being as records of old frontal systems on a 
progradation process. 
Most of the prairies are located, on the zone further than the estuary mouth, showing a small frontal 
system of dune ridges followed by long plain area, associated in few places to embankments executed by urban 
implementations. The prairies also appear behind and intercalated to the system of inner ridges, but in smaller 
des are quantity. 
| to the The map analysis and the field observations show a big swampy area, separated from the sea by a dune 
sh with ridge system, that spreads and retracts determined by the hydrological system, which is regulated by the rain 
| of the regime. During the rainy period, the swamps overflow causing the formation of great swamps that grow by the 
almost swales and by the low regions, utilizing as relief valve of this additional quantity of water the draining channels, 
ict that being these dry by the time of the smallest precipitation indexes. The dune ridges system, except for few sites, is 
not suffering inundation during the whole year, neither are few prairie regions. 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 1203