by 128shot » Sun 11 Mar 2007, 23:24:38
Check out this study
http://css.snre.umich.edu/css_doc/CSS05-17.pdf
I found some interest facts
$this->bbcode_second_pass_quote('', ' ')4% of the nation’s electricity use goes towards moving and treating water and
wastewater. Approximately 80% of municipal water processing and distribution costs
are for electricity.
Groundwater supply from public sources requires 1,824 kilowatt-hour per million
gallons – about 30% more electricity on a unit basis than supply from surface water
primarily due to a higher requirement of raw water pumping from groundwater systems.
7% of the world’s energy consumption in 2000 was used to pump and treat water for urban residents and industry (equivalent to total
energy consumed by Japan and Taiwan).
To reach universal coverage by 2005, ~ 3 billion people need to be linked with a water supply and more than 4 billion with sanitation,
thereby increasing the electricity consumption of the water and wastewater sectors by 33%.
in what seems to be a simple 2 page report, it begged 2 questions out of me. how tied is our clean/fresh water supply tried to fossil fuels that generate electricity, specifically coal and natural gas? and is the Western half of the US due in for some serious water shortages soon, even without peak oil?
so I dug around and found this
http://www.rmi.org/images/other/Water/W ... er2010.pdfwither that is doomer fantasy or not is yet to be soon, but it says this:
$this->bbcode_second_pass_quote('', 'T')he costs of maintaining and improving infrastructure are
increasing, and some sources of funds, such as federal grants
and loans, are in doubt. Changes in private capital markets
are also under way.
Municipal water systems are very capital-intensive.
Construction, improvement, and replacement of water storage
and diversion facilities, treatment plants, pumping stations,
and distribution and collection lines require major investments.
Substantial capital requirements to meet regulations,
accommodate growth, and address deferred maintenance are
anticipated in the coming decades. On the wastewater side, the
EPA has estimated that $137 billion will be required over the
next 20 years for publicly owned treatment works, line maintenance
and rehabilitation, new sewage collector and interceptor
lines, management of combined sewer overflows, and other
related needs.
Capital needs are also considerable for drinking-water systems.
Studies have projected needs ranging from $3.7 to $12.0
billion annually over the next several decades.3 These needs
can be traced to a variety of factors, including improvements
directly related to the Safe Drinking Water Act, costs for
deferred maintenance that must be addressed as systems come
into compliance with the Act, and satisfaction of demand
growth and other infrastructure needs unrelated to the Act.4
Deferred maintenance is a particularly troubling aspect. For
instance, municipal water systems now spend an estimated
$1.7 billion annually to replace water-distribution pipes, but at
current replacement rates, any given pipe will only be replaced
once every 200 years. If utilities are to maintain water-system
serviceability, the rate of replacement must be substantially
increased
anyone else concerned? more information would be nice.