• AWWA CSC94046
Provide PDF Format

Learn More

AWWA CSC94046

  • Statistical Characterization of Droughts to Define Water Supply System Reliability
  • Conference Proceeding by American Water Works Association, 01/01/1994
  • Publisher: AWWA

$12.00$24.00


The computer model developed for Louisville's Raw Water Master Plan was designed to simulate the operation of the City's system under various drought conditions, patterned after historic droughts. Though the model shows whether the existing system is capable of withstanding the drought(s) occurring during a historic drought, the results do not provide an estimate of the statistical "reliability" of the system. To evaluate reliability, statistical analyses of the historic streamflow record were conducted to characterize past droughts in terms of magnitude, duration, and severity. The drought analyses revealed that giving any period a specific drought label (e.g., the 50-year RI, 24-month duration drought) is not a clear-cut decision and can be misleading. Any such drought could also be shown to be comprised of a multitude of both dependent and independent droughts of shorter durations and both lesser and greater severity. Rather than selecting the "worst drought of record" as the design period for the Master Plan, drought periods in the historical record were located on the MFD curves to identify candidate simulation periods for modeling the City's system at acceptable levels of protection, defined by both duration and frequency of occurrence.

Related Products

AWWA WQTC60611

AWWA WQTC60611

Comparison of an Anionic Polymer to No Polymer Addition for Treating Filter Backwash Water..

$12.00 $24.00

AWWA MTC64524

AWWA MTC64524

Integrated Approach to Construction and Startup of the 96 mgd Lakeview WTP for the Region of Peel..

$12.00 $24.00

AWWA INF52174

AWWA INF52174

Field Performance Monitoring of a Sliplined Watermain..

$12.00 $24.00

AWWA ACE59836

AWWA ACE59836

Water Conservation in Georgia Bringing Efficiency into Mainstream Thinking..

$12.00 $24.00