floodplain deposits which are behind the levees consists predominantly of clays and silts with minor to abundant plant remains (Lam 1989).
Johnston SG, Slavich PG and Hirst P (2003) Alteration of groundwater and sediment geochemistry in a sulfidic backswamp
due to Melaleuca quinquenervia encroachment.
On the upstream side of the backswamp
, several miles away, the water entering the floodplain was a milk-chocolaty brown, rife with all the sediments and nutrients the river holds.
The types of aquatic habitats and vegetation sampled were river, "corixo" (anabranch, oxbow), floating meadow, lake, pond, seasonal channel ("vazante"), backswamp
and incoming stream.
Field sampling was guided by geology and geomorphic attributes: upper slope, midslope and backswamp
with 7%, 4% and 1% slope, respectively.
The site is located in a backswamp
catcbanent of the Tweed River estuarine embayment.
areas of the study area have been extensively modified (Tulau 1999), which changes the natural hydrological characteristics of the coastal floodplain (Sammut et al.
Until the levees reached the first high ground, about 160 kilometers upstream at the site of present-day Baton Rouge, floods escaping the channel upstream could still creep into the city's rear quarters from the overflowing backswamp
Quercus lyrata-Carya aquatica EC occupies wet depressions, bottoms of chutes, slough edges, and backswamp
Differences in soils were attributed to their natural levee and backswamp
areas, or chavascal, support scrubby vegetation mixed with some trees, such as the munguba (Pseudobombax munguba).
In most years torrential monsoons fill Fogg Dam to overflowing and inundate the backswamp
to a depth of [greater than]1 m, whereas inundation on the rest of the floodplain is [less than]0.