The Alton Telegraph:

A hydrological separation of the Great Lakes and Mississippi River basins would send Asian carp swimming back downstream, but also alter water quality.

The Great Lakes and Mississippi River Interbasin Study under way by the U.S. Army Corps of Engineers’ Chicago District aims to find a solution that would halt migration of Asian carp and other aquatic invasive species into Lake Michigan. But a hydrological separation also could affect other things, such as water quality or flooding.

So far, research indicates that while a separation of the waterways likely would not affect the degree of flooding Downstate, it could change the quality of water flowing toward Alton and St. Louis. The water now flowing this way contains treated wastewater and storm water runoff.

The feasibility portion of the federal study, anticipated for public review in draft form by early 2015, requires the corps to build models to test its theories before publishing any findings. Read more.