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Nathan Stratton writes: +-------- |>Don't site buildings where there have been floods in the past 500 years |>and don't site buildings downstream from dams. If a waterproof buildingis |>built in a flood area, make sure that snorkles rise above the 500 year |>flood level. | |This is a very basic thing and all of us should try to do this. +-------- Well... Talking to a hydrologist is definitely a good thing (one I know has a great Hagar cartoon with someone explaining the "benefits" of living near a river :->) but I'm not sure the "500 year flood" is the right answer... Even if it is, you need to worry about "jumps" in the time series - usually human-induced, e.g. building new dams, diversions, parking lots, suburbs, etc. Regards, -james ____________________________________________________________________________ James W. Watt, james@newbridge.com Ph: +1 613 591-3600 Newbridge Networks 600 March Rd Kanata ON Canada K2K 2E6 FAX:+1 613 591-3680