OT, but I was wondering if anybody has compiled a massive study of the effects on the environment by building Water Dams?”

I did hear about one study (no link, unfortunately) that mentioned the deltas of the rivers are receeding because lack of dirt washing down the rivers. Most of the dirt is being caught behind the dams (reducing their capacities).

The mouth of the Mississippi was one example. Here, the wetlands are receeding, and very little new dirt coming down river to fill it back in.

Add to that the levee system around some sections (to keep river in banks) also prevents new dirt from washing in.

Cleaner water is making it’s way down-stream…

If you read my earlier post you will see I specifically made reference to the fact that siltation was NOT a factor. There have been many papers published on it and numerous ‘digs’ one of which I participated in. It is sea level fall that has caused the difference-which is not to say for a moment thatr there has not been any siltation.

Tonyb

I’m suggesting that siltation is why Harlech castle is now “high and dry”, NOT a fall in seal level.

What’s your point? That silting changes the sea level?

Sorry, but the erstwhile and esteemed John Daly clearly demonstrated that the sea level hasn’t changed in over a hundred years: click

………..
“Since Luther bet his life standing on his principles, he’d be less at home on RC than Galileo, who caved.”

But Giordano Bruno didn’t and look what happened to him.
You better watchit, pal!

A contemporary parallel for me is CSICOP and those Skeptics. I’ve found stuff they and Randi have done that is contemptible (like much of RC) IMO. But I don’t therefore automatically disagree with CSICOP members posting on Climate Skepticism here.

As to Pythagoras, who today is aware that he was an initiate into the Egyptian and Babylonian mysteries, and ran a whole mystery school concerned with sacred number (among many other things) at Crotona?

My point was, his reliance on “sacred Scripture” and Ptolemaic orthodoxy has a familiar ring to those who’ve encountered AGW true believers. Of course, Luther lived before the establishment of modern, scientific method. What’s their excuse?

Neither will I condemn Galileo, for having the good sense to save his own life. He knew the cat was out of the bag, and that even the Vatican astronomers quietly agreed with him and had to keep their mouths shut too. Don’t want to lose your funding– or your head.

It’s amazing isn’t it? The science may have advanced, but politics is the same old s–t.

Since Luther bet his life standing on his principles, he’d be less at home on RC than Galileo, who caved.

.
Don S. (19:53:14) :
Douglas DC: Your references to Luther and Galileo lead inexorably to Phythagoras and the Ionians.

Who’s Phythagoras?

Had a facelift and changed his name to Robert Gibbs.

I doubt dams per se have much effect on the environment and climate. However, most dam water is used for irrigation. And irrigation is easily the largest scale environmental change of the last 50 to 100 years. In excess of 600 million acres are irrigated.

In many and perhaps most places, the majority of irrigated water is lost thru evaporation. Which means it becomes the most potent greenhouse gas.

I’m not aware of anyone having quantified the greenhouse effect from irrigation, but where I live in Western Australia, the days when we have clear skies and near ground humidity are easily our hottest days (and nights). Even a small increase in humidity affects temperatures.