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Itica�c;iy ll�:icl 1 -- i.nt 5 <br /> $lunn Dr:�inagc Rcport <br /> I StormCfU) 13ackground <br /> The ti5ht line conveyance designs and hydraulic grade line calculations for this <br /> project were completed using StormCAD (Haestad Methods, lnc.). The <br /> j StormCAD program sums the flows tributary to each reach (pipe) and then <br /> perfonns a direct step backwater analysis on the network. The steady state <br /> i energy equation (Bernoulli equation) is used along each reach (pipe) in the <br /> network. The friction loss is calculated using Manning's equation continuously <br /> along ihe length of the pipe. The hydraulic grade line is calculated from <br /> downstrean� to upstream (as is iypical for backwater calculations). StormCAD <br /> uses the HEC-22 method for determining junction headlosses. <br /> � <br /> I <br /> I <br /> I <br /> I <br /> - — <br /> i��i����.��� ,-. �un.i <br /> I �riz►���� <br /> , <br />