Tokyo - Water Supply

submitted by Stuart Leiderman

dear Group:

thanks for the recent string of correspondence.  for those involved in the 
Japanese response, I found a booklet with map describing Tokyo's water supply 
[attached].  it appears to be primarily reservoirs, thus vulnerable to fallout.  
there are probably formulae to estimate rate of lake clearance through 
sedimentation, assimilation into the aquatic food chain, amounts of flocculant 
needed to accelerate removal, etc.  these will depend on water temperature, flow 
rates, and at this time of year, there is also the seasonal spring turnover of 
the whole water body, increasing suspended solids, etc., etc.

in view of the warnings not to give infants tap water, I might be tempted to 
isolate a single reservoir, apply maximum filtration methods and reserve that 
supply for infants.  with a core-city population of fifteen million, could be 
talking about a couple million really small children.  

multiply that by a gallon a day, so need two million gallons a day of specially 
prepared and delivered water.  heavy naval equipment, for example 
http://www.aqua-chem.com/content/military-spares-parts may have capacities up to 
100,000 gpd, but even at that, Tokyo's children will need a fleet of ships 
cranking full-time plus a bottling or tank transport system.

thanks to all,

Stuart Leiderman

Environmental Refugees and Ecological Restoration

(see attachment below)