> The only way that can be used as an indicator is to compare that flow to the previous 500 or 1,000 years. Less than 100 years in no way shows long term weather patterns.
That would not be a valid comparison, since the Mississippi River of the 1500s did not remotely resemble the river as it has been for the past 75 years or so. Dams, levees and other man-made changes have totally changed the nature of the river's flow.
But if we want to map river flow against atmospheric CO2 levels, the time period is totally valid, since we have very accurate CO2 measurements starting in 1959.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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