The Atchafalaya River Delta. Report 13. Summary Report of Delta Growth Predictions
1992
Donnell, Barbara P. | Letter, Joseph V | Jr
Coastal Louisiana is experiencing dramatic and alarming land loss. The exception to this general trend is the Atchafalaya River delta, which has been experiencing dramatic deltaic growth during the past 20 years. This deltaic activity can be viewed as both a resource for development of coastal wetlands and as a threat for potentially aggravating flooding in communities upstream of the delta. In response to these concerns, the Corps of Engineers is conducting a thorough investigation to predict how the delta will evolve over the next 50 years, the impacts of the growth and the effectiveness of structures for controlling detrimental results. The investigation approach used several analytical and numerical techniques applied separately to arrive at independent predictions of delta growth. The approach was arranged to provide results from increasingly sophisticated techniques over the period 1980-1989. Each of the techniques are summarized and comparisons are made. The techniques included analytical model, regression/extrapolation analysis of past behavior, generic analysis of similar deltas' growth patterns, a quasi-two-dimensional numerical model, and TABS two-dimensional numerical model.
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