Storm Centering Approach for Flood Predictions from Large Watersheds
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Volume 17, Issue 9
Abstract
Most storm water numerical models assume that the entire watershed area is covered by the design storm and shall be considered as the tributary area to the design point. Care must be taken when simulating storm runoff generation from a large watershed because the rain storm may only cover a portion of the watershed. Because the area-averaged rainfall depth decays with respect to the storm-cover area, the experience of the larger the watershed, the higher the flood flow is no longer true. In this study, a storm centering technique is developed to identify the conservative size of a storm cell so that the design runoff rate and volume can be maximized among various locations of a storm center. Without any storm water detention in the watershed, the product of a tributary area and area-weighted rainfall depth serves as the indicator of runoff accumulation through the waterway. When taking detention basins into consideration, the effect of flow attenuation is converted into an equivalent tributary area that is used to maximize the runoff volume at the design point. This maximization procedure has been tested by the Lower Detention Basin designed and built in Las Vegas. The method is simple, but sensitive enough to identify the critical storm size for conservative designs.
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References
Bonnin, G. M., Todd, D., Lin, B., Parzybok, T., Yekta, M., and Riley, D. (2003). Precipitation-frequency atlas of the United States, National Oceanic and Atmospheric Administration (NOAA) Atlas 14, Vol. 2, Version 2, National Weather Service, Silver Spring, MD.
City and County of Sacramento. (1996). “Hydrology standards.” City and County of Sacramento drainage manual, Chapter 4, Vol. 2., Sacramento, CA.
Clark County Regional Flood Control District (CCRFCD). (1995). Las Vegas Valley master drainage plan update, Las Vegas.
Clark County Regional Flood Control District (CCRFCD). (1999). Hydrologic criteria and design manual, Las Vegas.
Dixon, M., and Wiener, G. (1993). “TITAN: Thunderstorm identification, tracking, analysis, and nowcasting—A radar-based methodology.” J. Atmos. and Oceanic Technol., 10(6), 785–797.
Durrans, S. R., Lesly, T. J., and Yekta, M. (2002). “Estimation of depth-area relationships using radar-rainfall data.” J. Hydrol. Eng., 7(5), 356–367.
Guo, J. C. Y., and Harrigan, K. (2009). “Conservative design rainfall distribution.” J. Hydrol. Eng., 14(5), 528–530.
Guo, J. C. Y., Urbonas, B., and Stewart, K. (2001). “Rain catch under wind and vegetal effects.” J. Hydrol. Eng., 6(1), 29–33.
Hershfield, D. M. (1961). “Rainfall frequency atlas of the United States for durations from 30 minutes to 24 hours and return periods from 1 to 100 years.” Technical Paper No. 40, Weather Bureau, U.S. Dept. of Commerce, Washington, DC.
Hoblit, B., Zelinka, S., Castello, C., and Curtis, D. (2002). “Spatial analysis of storms using GIS.” Special Report, OneRain Inc., Orangevale, CA.
Mark Group. (1988). “Flood control master plan for Maopa Valley, Nevada.” Technical Report, Engineering and Geologists, Inc., Las Vegas.
National Oceanic and Atmospheric Administration (NOAA). (1973). Precipitation-frequency atlas of the western United States, NOAA Atlas 2, Vol. VII, Nevada, Silver Spring, MD.
National Oceanic and Atmospheric Administration (NOAA). (1984). Depth-area ratios in the semi arid Southwest United States, National Weather Service (NWS) NOAA Technical Memo (TM) Hydro-40, U.S. Dept. of Commerce, Silver Spring, MD.
Rossman, L. A. (2005). “Storm water management model user’s manual. Version 5.” Water Supply and Water Resources Division, National Risk Management Research Laboratory, Cincinnati.
U.S. Army Corps of Engineers. (1998). HEC-1 flood hydrograph package-User's manual, Hydrologic Engineering Center, Davis, CA.
Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 17 • Issue 9 • September 2012
Pages: 960 - 964
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Nov 15, 2010
Accepted: Oct 29, 2011
Published online: Nov 2, 2011
Published in print: Sep 1, 2012
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