Skip to main content
U.S. flag

An official website of the United States government

Peat accretion histories during the past 6,000 years in the marshes of the Sacramento-San Joaquin Delta, CA, USA

July 30, 2009

The purpose of this study was to determine how vertical accretion rates in marshes vary through the millennia. Peat cores were collected in remnant and drained marshes in the Sacramento–San Joaquin Delta of California. Cubic smooth spline regression models were used to construct age–depth models and accretion histories for three remnant marshes. Estimated vertical accretion rates at these sites range from 0.03 to 0.49 cm year−1. The mean contribution of organic matter to soil volume at the remnant marsh sites is generally stable (4.73% to 6.94%), whereas the mean contribution of inorganic matter to soil volume has greater temporal variability (1.40% to 7.92%). The hydrogeomorphic position of each marsh largely determines the inorganic content of peat. Currently, the remnant marshes are keeping pace with sea level rise, but this balance may shift for at least one of the sites under future sea level rise scenarios.

Publication Year 2009
Title Peat accretion histories during the past 6,000 years in the marshes of the Sacramento-San Joaquin Delta, CA, USA
DOI 10.1007/s12237-009-9202-8
Authors Judith Z. Drexler, Christian S. de Fontaine, Thomas A. Brown
Publication Type Article
Publication Subtype Journal Article
Series Title Estuaries and Coasts
Index ID 70199513
Record Source USGS Publications Warehouse
USGS Organization California Water Science Center
Was this page helpful?