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RATES OF RECENT SEDIMENTATION IN LAKE PEPIN 1
Author(s) -
McHenry J. Roger,
Ritchie Jerry C.,
Cooper Charles M.
Publication year - 1980
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1980.tb02547.x
Subject(s) - sedimentation , sediment , marsh , hydrology (agriculture) , geology , environmental science , physical geography , geomorphology , geography , ecology , wetland , geotechnical engineering , biology
ABSTRACT: Sedimentation rates since 1954 in Lake Pepin, as determined from the content of fallout cesium‐137 in the sediment profile, have exceeded 2.5 cm/yr in the upper part of the lake. These rates, although somewhat less than those of the previous half century (1895–1954), are sufficiently large that the upstream portion of Lake Pepin is threatened with conversion to a marsh within a century. The density of the sediments measured increased with depth in the sampled profile from 1.1 to 1.2 g/ml at the sediment surface to 1.4 to 1.5 g/ml at 2‐ or 3‐m depth. There was little or no change in the patterns of textural composition or density of the sediment profile with depth and age over the past 80 to 150 years.