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Love this new tool:

StormwaterPA fan and Philadelphia-based environmental engineer Adam Erispaha sent us an exciting new tool that he recently created. is an online tool for computing a stormwater runoff hydrograph over a single drainage area based on the curve number and SCS Unit Hydrograph hydrology.

Give it a look! Adam also created this video tutorial to explain the process:

Thanks for sending this our way, Adam! If any of you out there are doing exciting stormwater stuff, let us know via email or on Twitter!

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