On Wed, 28 Feb 2007 18:36:10 -0600, Ron wrote in message <[EMAIL PROTECTED]>:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 02/28/07 12:58, [EMAIL PROTECTED] wrote: > > On 27 Feb, Ron Johnson wrote: > > > >>> It's not stupid if you haven't been there. > >> I thought you were smarter than that. > >> > >> Presuming you're not: > >> > >> Mountains and valleys (great for filling up with dammed water) are > >> the predominant geological feature of the areas of the Columbia and > >> Snake rivers where those hydro dams are located. > >> > >> Mountains and valleys are *not* the predominant geological feature > >> of the Great Plains states, or those uber-mountainous states like > >> Louisiana and Mississippi. > >> > > > > But there are turbines which are designed to extract energy > > from the flow of a river without the need of significant height > > gradients. And tidewater generators don't rely on any (land) > > topography, so the question is not entirely unreasonable. > > Taking energy out of the river means it slows down, depositing more > silt, and in unexpected places. Which means impaired ship > navigation and more dredging. > > And in the spring flood stages, a slower river means more floods. ..and more water going into the soil to replenish the ground water you have pumped out for farmland irrigation. -- ..med vennlig hilsen = with Kind Regards from Arnt... ;o) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
