Will Jindal's Sand Berms Work?

Rob Young doubts it:

The EPA directly questioned the proposed berm’s effectiveness, suggesting there is no evidence that the project will stop oil from entering the marshes and estuaries because it is constructed only in front of the barrier islands and will not block the inlets and deepwater passes. In addition, EPA questioned whether a project that will take at least 6 to 9 months to build would be completed in time to have any impact on the spill.

As a coastal geologist who studies coastal storm impacts, it is clear to me that this berm, located just offshore of the barrier islands, will also be extremely susceptible to erosion. Indeed, it will begin to erode immediately upon completion. Even a simple understanding of coastal processes leads one to conclude that this sandy berm could disappear within a few months.

Is this just Jindal posturing? Or a desperate attempt to do something?