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<br />e <br /> <br />e <br /> <br />e <br /> <br />DRAINAGE CRITERIA MANUAL (V. 2) <br /> <br />HYDRAULIC STRUCTURES <br /> <br />./ EGLl <br />EGLm ~ ' <br />.-______v/----,,__LEnerg~G:e Une <br /> <br />-- -- <br />- El-- <br /> <br />Water surface elevation at crest <br /> <br /> <br />"-= Main <br />Low-Flow Elev. <br />Elt <br /> <br />Elev. Elm <br /> <br />HYDRAULIC ANALYSIS <br />SECTION AT CREST OF DROP <br /> <br />FIGURE HS-2a <br />Hydraulic Analysis-Section at Crest of Drop <br /> <br />Y c - CR ITICAL DEPTH <br />YI - DEPTH AT TOE OF DROP <br />Y2 - EFFECTIVE TAILWATER IN BASIN <br />Ytw- CHANNEL TAILWATER DOWNSTREAM <br /> <br />{EGL TRICKLE <br />_ bEGL MAIN DROP <br /> <br />-- -=--=--=--=-~--- <br />-- <br /> <br />Yo <br /> <br /> <br />Ytw <br /> <br />Jump in trickle cSoes not have <br />to be the same as the main <br />port of the drop. <br />\ <br /> <br />"""------- <br /> <br />~---~ <br /> <br />Trickle IOvert <br />HYDRAULIC ANAL VSIS <br />PROFILE FOR SLOPING <br /> <br />Water surface elevation a <br />crest. See Figure 20 <br /> <br />Y2 <br /> <br />Profile thru main <br />portion of drop <br /> <br />DROP <br /> <br />FIGURE HS-2b <br />Hydraulic Analysis-Profile for Sloping Drop <br /> <br />06/2001 <br />Urban Drainage & Flood Control District <br /> <br />HS-43 <br />