I am confused as to the point, if any, you are making. I thought you said that recent CO2 changes caused changes in our century, which I happen not to believe.
No.
I am saying man causes changes in the severity of droughts and flooding from land use changes. Not from CO2. Also that droughts have a greater effect because of more people using a limited source of water.
My post:
The funny thing about the severity of droughts and floods, is that it is cause by us. It just isn't a form of climate change.
I am saying we are not changing the climate.
We restrict the flow of rivers and steams, and people wonder why they flood when they didn't used to.
When dealing with the physics of water flow, the greater the restriction to flow, the higher the water has to reach for more mass to overcome a greater resistance to flow.
We have inadequate storm sewers for when it rains hard, now that precipitation cannot soak into land covered by asphalt, concrete, and buildings.
Depending on soil type, several inches worth of water in natural settings would be absorbed by the land. When we cover these surfaces with concrete, asphalt, and buildings, the land is no longer available to absorb the water. All municipalities are on a budget, and even when a storm sewer system is designed for the worse expected events, we on occasion have more severe events yet. Then as years pass, building codes change. Areas that once used to had 1/8th acre lots and single residence homes, are now having multiple family buildings built, and some areas now have even less, or no land to absorb water, and sewer systems are not retrofit to accommodate the greater water levels. This is just one of several problems.
We have more people using the same water supplies, and people blame CO2 for the water being used faster.
My mention of CO2, is saying it is the scapegoat, rather than government or the people. California now runs the Colorado river dry. It runs many of its resources dry. Shasta lake has some rather extreme high and low points, and as the number of people using water... Glaciers, melting snow packs, etc. only furnish a fixed range of water. We are exceeded the low point capacities, so when we have long periods of dry weather, rather than saying we have too many people for the existing water... They use CO2 as the scapegoat, saying it caused a severe drought, when it is no worse than past historical drought periods.