AWWA IMTECH64744

A hydraulic model has been developed for the Pinellas County Drinking Water System, alarge and complex water transmission and distribution network including six pumpingstations, 11 storage tanks, approximately 2,000 miles of piping, and thousands of valves.The piping network was created from GIS-based shapefiles of the system and correctedusing record drawings. The elevations were assigned to the network nodes using 1-footcontours of a County-wide Airborne Laser Swath Mapping. The Hazen-Williamscoefficients were assigned based on known pipe materials and diameters withadjustments for age and expected flow velocity. Monthly retail meter records, real-timewholesale meter records, and unaccounted-for water flows were allocated to the nodesusing the conventional bottom-up approach. Boundary conditions were incorporated intothe model. Anomalies were identified and corrected. The model was calibrated using thetesting data for the maximum hour demand. The simulation results were compared withthe testing results for six other demand events. The model was in close agreement withthe physical system in all simulation scenarios. The authors have successfully used themodel in the design of a 110-MGD water blending facility. Includes 7 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

03/01/2007

Number of Pages:

17

File Size:

1 file , 360 KB