As interesting and incredible that some of what USACE have done is, there is almost always a horrendous knock-on effect that they didn't consider. For example, through all of the engineering on the Mississippi they have inadvertently started to destroy the delta.<br><br>Also, to be fair, the hydrological models haven't improved much. Most of the industry (in North America at least) depends on a very basic model that only really works well on very small sections (reaches) at a time, produced by USACE and is freely available. I recently discovered that the biggest environmental consultancy in the UK used this model, HEC-RAS, to predict changes on the River Wensum...they did  the whole length of the river in one big hit and have no idea that their results will be ridiculously poor...further cementing my reasons for not wanting to work for them.