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AWWA ACE63008
- Better Water Quality through Tank Assessment and Mixing Improvements
- Conference Proceeding by American Water Works Association, 06/01/2006
- Publisher: AWWA
$12.00$24.00
This slide presentation outlines a study to: investigate how storage tanks impact waterquality;evaluate and assess all 50distribution tanks;design modifications for reservoirsand elevated tanks; and,study mixing options for standpipes. The general approach involved:reservoirs, tanks with Aspect Ratios (H/D) ¿¿¿¿¿¿¿ 1;use the split design as in the Higdon tests;standpipes, tanks with Aspect Ratios (H/D) ¿¿¿¿¿¿¿ 1;three nozzles located along a vertical plane will be sufficient;locate the lowest nozzle at ¿¿¿¿ the elevation of the averageHWL;locate the top nozzle just below the average LWL;increase the nozzle diameter with the increase in elevation;decrease the effective diameter with respect to themaximum allowable head loss;use Duckbill Checkvalves;allows for reduction in effective diameter; and,provides flexibility to meet target velocities at lower thanexpected flowrates. Includes table, figures.
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