Apport et distribution des nutriments dans le bassin versant Seybouse à la mer
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Date
2012
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Université Abbes Laghrour -Khenchela-
Abstract
Seybouse river drains one of the main watershed basins of the country (6500 km
)
with a strong climatic hydrographic network. On this basin exerted significant
anthropogenic activities from the number of inhabitant (2 million inhabitants) that
grow quickly.
In order to cover the drainage basin of Seybouse, six stations were sampled during
our study of the winter period. For a better understanding of the chemical conditions
reigning the basin, the stations are positioned according to strategic points: upstream
and downstream of dams in the confines of the basin, the ultimate crossroads mouth
of by-products of anthropogenic activities.
What we retained from this study is the important capture of Silicon at the level of
dams which will necessarily impact the coastline receiving. It should also be noted
the dominance of the organic fraction of phosphorus (POD) compared to that of
nitrogen which form as 17% of dissolved nitrogen. Paradoxically, in terms of
nitrogen and phosphorus dissolved with a ratio of 8 deviates widely to the Redfieled
report. However as Silicon is a reduction in the mouth with a report full of Si/N = 1.