Wednesday morning, at every turn, the creeks and streams were in flood stage. Not the devastating floods that came in December that sent the Meramec River so far over its banks that entire towns flooded, but in flood enough to close roads. Current River? Flooding. Niangua River? Flooding. Meramec River? Flooding. Historically, when the world was mantled in grass-forb mix and contiguous woodland cover, a spring thunderstorm system in karst topography really wouldn't impact the rivers this way; historically, water would seep into the ground and slowly percolate through carbonate rock and end up in springs. Hence, the clear, swift, blue water streams that we normally associate with the Ozarks.
But that was in a different era. The Meramec River, for example, has long been heralded as a biodiversity hotspot, but also a threatened resource. Mussel, crayfish and fish diversity were (in the not too distant past) considered globally significant. Many conservation initiatives to protect biodiversity in the Meramec watershed have occurred throughout the years, but the river is seriously imperiled. Development in the watershed including large, ranch style homes built on the banks,improperly managed septic systems and cattle grazing have resulted in significant sediment loading and a truly filthy river. Mussels that depend on clean water don't have a chance. The long pincered crayfish that depends on slab bedrock-bottomed streams are probably extirpated with all the gravel loading and interstitial spaces filled with soil from the bottomlands and cyanobacteria. Drum? The trash fish of lousy rivers? Thriving. Probably Asian carp and largemouth bass, too.
Walk the distance of the spring branch to the confluence of the Meramec River after a rain event and you'll see this: