1/27/1982 - Laserfiche WebLink

Home Browse Search

Looking at the actual design of the basin itself, fir. Thomas again plauded Dr. Christensen and his accomplishments and back- ground. fie briefly pointed out what Dr. Christensen would have to prove to them and all the other agencies that they were not going to cause the degradation of water. He briefed the Board on the things they wanted to happen to keep the ecology as it should be and prevent the export of any pollution was to have a good mixture of all the elements that should be there. Oxygen was listed as the primary element; formed by the many little plants but mostly from the surface, absorbtion from the surface. At the lower level there will not be a great deal of oxygen unless there is something that is going to cause a mixing. In tropical waters, the primary turn -over factor is wind, crossing the surface, creating this convection and mixing these things. One of the things they were trying to prevent, which was, mentioned in the letter Mr. Challacombe read, was chemical stratification. Thi§ is some toxic substance that doesn't get mixed and accumulates and will kill fish. As you design a basin, these are some of the factors that are going to be involved in mitring this. The technique -designed by Dr. Christensen and his staff, and the past seven years research, has shown you can put together a computer model that will show you, as you plug in all the factors here, what will happen. This isn't something that is just on paper, it can then be tested in a model situation to see the -mixing will occur like the computer says it will. The tidal fluctuation was then discussed by Mr. Thomas. He said all they could say was they knew about that, he would plug into that tidal situation, just as it is, into the computer model. The question raised in that letter becomes a part of the methodology and at the end of that, the answers that come out show just how much of the mixing they will get. He felt Dr. Christensen's letter answered that concern; he stated what they were saying was, "Yes,, the methods are now available to determine that and to plug all those factors into the design." Mr. Jones said that was fine, but the Board was concerned with those factors and thought the Planning staff has raised some questions about assumptions concerning those factors and how they might fit into those models. He again stated he was concerned with the factors and not the models. Mr. Thomas stated the final design had not been completed. JAN 271982 600K PA(GE709 L -2.9-