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Implementation of the Century Ecosystem Model for an Eroding Hillslope in Mississippi

U.S. Geological Survey Open-File Report 98-440
Version 1.0

By Jodie Sharpe1,2, Jennifer W. Harden1, Seth Dabney3, Dennis Ojima4, and and William Parton4


1U.S. Geological Survey, 345 Middlefield Rd. M.S. 962, Menlo Park, CA 94025
2Present address: 3930 NW Witham Hill Dr. #198-V, Corvallis OR 97330
3U.S.Department of Agriculture-Agricultural Research Service, Oxford, MS 38655
4National Resource Ecology Lab, Colorado State University, Fort Collins, CO 80522

The objective of this study was to parameterize and implement the Century ecosystem model for an eroding, cultivated site near Senatobia, in Panola County, Mississippi, in order to understand the loss and replacement of soil organic carbon on an eroding cropland. The sites chosen for this study are located on highly eroded loess soils where USDA has conducted studies on rates of soil erosion. We used USDA sediment data from the study site and historical erosion estimates from the nearby area as model input for soil loss; in addition, inputs for parametization include particle-size data, climate data, and rainfall/runoff data that were collected and reported in companion papers. A cropping scenario was implemented to simulate a research site at the USDA watershed 2 at the Nelson Farm. Model output was compiled for comparison with data collected and reported in companion reports; interpretive comparisons are reported in Harden et al, in press.


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