An example of water run-off issues is that the Arkansas Game and Fish Commission is looking to relocate from Centerton, AR - outside of Bentonville. The spring that once gave water to the hatchery cannot provide enough outflow - the water which once seeped into the ground now flows over concrete and pavement - where there was once abundant farm land.
Those streams run off into the Illinois Watershed and into the Elk River through Sugar Creek . . . Northwest Arkansas is on several watersheds; White River, Illinois and some other stuff in Missouri and Oklahoma.
Here is an article from a group trying to get the Illinois River back on it's feet. In my opinion, it's not just the farms, it's urban development . . . the banks are washing away, algae blooms are increasing and folks are littering such as a recent issue with someone dumping port-a-potty chemicals into the Illinois River in the Prairie Grove area.
Why would they put a housing development 50 yards from the Illinois River?? Then again, we've got new golf courses popping up along the Illinois River Watershed and who knows what chemicals are running off into the streams? Not to mention that they are altering the banks and causing more erosion.