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Title: The Atchafalaya River Delta. Report 3, Extrapolation of delta growth
Authors: United States. Army. Corps of Engineers. New Orleans District.
Letter, Joseph V.
Keywords: Atchafalaya River Delta
Atchafalaya River
Atchafalaya Basin
Delta evolution
Sedimentation rates
Sediment transport
Hydrologic data
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: This study predicts the future delta growth of the Lower Atchafalaya River delta based on an extrapolation of historical deposition trends in Atchafalaya Bay. The prediction is made with a regression model developed by correlating deposition rates with river discharge, sediment yield, local water depth, and location relative to the delta mass centroid. The regression model is applied to a 50-yr hydrograph using the 1977 bathymetry as initial condition. The predicted delta condition at 10-yr increments is reported. Sensitivity tests were made with the regression model which determined that the sequencing of hydrologic events had no impact on the resultant 50-yr condition, provided the total water and sediment entering the bay remained unchanged by resequencing events. It was concluded that within 50 yr the delta should evolve gulfward of Eugene Island, the gulfward limit of the bay.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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