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Watershed Modeling, II Page I of 2 • Now inside MicroSta[ion • Calculate flood and routed hydrographs using the TR-20 method. • More repons aze available with user-defined custom formatting. • Display flow and volume quantities in a variety of units. • User-defined return periods allow more flexibility for Intensity Duration Frequency (IDF) curve generation. • A tabular rainfall entry method provides more accuracy when developing IDF curves. • Rainfall maps now allow you to view the rainfall intensities for the area sutroundingyour state. • Outlet structures and reservoirs can now be saved to a central library. • What drainage area contributes to a selected outfall? How • You can create unit hydrographs using the SCS ' much runoff occurs on your site if the 100 year flood Triangular, the SCS Curvilineaz, the Snyder and the occurs? What happens if you develop your site for Rational methods. commercial or residential use? Do you need a detention ' pond? What kind of outlet structures will meet the flow limits placed on you by the local government? Need to catalog your land uses? Need to automatically compute total area, weighted curve numbers and weighted runoff ' coefficients based on land use and watershed boundaries? With Watershed Modeling you can evaluate these and many other drainage design concerns. Watershed Modeling ' is tightly integrated with Eagle Point Surface Modeling to allow you to use original and design surfaces to evaluate your site. ' • Three rational flood hydrograph methods are available to • Storms can be designed using SCS 24-hour storm provide you with flow versus time information. distributions (Types [, IA, II, IIA and III). • Others, including the Santa Barbara Urban method, aze • Synthetic storms of specified duration and return periods available. can be accounted for. • hnpor ASCII files with temporal distribution of flow if a • Input precipitation information in hyetograph format or custom method is needed. total cumulative volume. ' • Combine flood hydrographs to account for drainage areas • Watershed Modeling includes rainfall maps for the ent'tre coming together. United States [o help you calculate intensity-duration-frequency relationships. • Enter information Gom other sources using the Custom ' Entry Method. • The Convex, Modified Att-Kin and Muskingum channel • Stage/storage curves can be defined with an equation or ' routing methods are provided to route hydrographs through user-input data. You can approximate storage volume [wing channels. the linear, SCS TR-55 and Modified Rational methods. • Storage Indication and Modified Puls routing methods • Stage/discharge curves can be generated for various types '' are available to route hydrographs through a reservoir. of outlet sttucttues including different types of weirs, orifices and culverts. • If you have a design model for a detention pond, you can automatically compute the stagelstorage relationship at a ' defined increment. In seconds you can see the exact storage ' 12/4/97 8:23:36 AM in record lime, withou! sacrificing accuracy.