There are some differences, actually, in the science. Water does not flow out through the deepest part of the river. It's restricted by the choke point, the shallowest part of the river. That is where the flow is going to be impeded.
What has been seen in the upper Great Lakes study.... In fact, in 2012 the flow rate of the St. Clair River declined by 12%. That year, we hit an all-time recorded low. Evaporation is playing the controlling part of water levels.
If you look at the historical modelling that's been done, NOAA, the National Oceanic and Atmospheric Administration in the United States, has very clearly shown now that instead of precipitation driving lake levels, it's evaporation and water temperature. There are some significant evolutions in the science that have happened over the last couple of years.