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Real-Time Stormwater Management using Depth, Duration, Frequency Thresholds

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The City of Austin (City) operates a Flood Early Warning System (FEWS) to reduce public exposure to flash flood hazards. The system is operated and maintained by the Watershed Protection and Development Review Department, Watershed Engineering Division. Advanced information and warning of urban storm water flooding is achieved by the FEWS. A critical component of the system is rainfall detection and interpretation. Radar rainfall detection and forecasting also utilizes the existing ALERT (Automated Local Evaluation in Real Time) rain gauge network. An innovative web-based hydrologic information system built upon radar hydrology and implemented in 2004 has proved to be useful during storms producing heavy precipitation and flooding. This presentation will describe the development and use of Depth, Duration, Frequency (DDF) values in near real-time.
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Document Type: Research Article

Publication date: 01 January 2006

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