by wet sieving and the median diameter calculated (Percival
and Lindsay, 1997). Total organic carbon in the sediment was analyzed using the
modifications of the Schollenberger chromic acid oxidation technique (Buchanan,
1984). For sediment particle size distribution, one replicate per site was analyzed,
with a total of three replicates per study region. For sediment water content and
total organic carbon determination, three replicates per site were analyzed, with a
total of nine replicates per study region.