The Atchafalaya River Delta. Report 3. Extrapolation of Delta Growth.
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 re-sequencing events. It was concluded that within 50 yr the delta should evolve gulfward of Eugene Island, the gulfward limit of the bay.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1982
- Accession Number
- ADA120778
Entities
People
- Dylan Stewart
- Joseph V. Letter Jr.
- R. Schneider