Laserfiche WebLink
<br />I <br />I g <br /> h <br />I H <br />How <br />I Hd <br />hL <br /> h* <br /> I <br />I Hm <br />H, <br />I Ht <br />I Hw <br />hv <br /> J <br />I K <br />K" <br />I 1(, or K] <br />~ <br /> K* <br />I L, or LA <br />L" or La <br />I Ld or 1-0 <br /> Lr or Lp <br />I L <br /> J <br />Ltu <br />. L,d <br />LH <br /> Lv <br />I M <br />I n <br />Nr <br /> p <br />I Q <br />q <br />I q", <br />qt <br /> R <br />I <br />I <br /> <br />Gravitational constant = 32,2 ft / 52 <br /> <br />Height of the wingwalls above the main crest <br />Height of baffles for baffled drops <br />Height of seepage cutoff <br />Drop height <br />Head loss <br />Total backwater in feet <br />Total energy head at the crest of the main drop <br />Differential head, usually at a drop; the difference between the upstream water <br />surface (normal depth) to the downstream tailwater, or the head difference <br />between analysis points (e,g, to point of supercritical flow minimum depth) <br />Total energy at the crest of the trickle channel <br />Head on structure for weighted creep ration, (headwater-tailwater) <br />Velocity head <br />~/ A., <br />Backwater coefficient for bridges <br />Base curve coefficient, part of K <br />Isbash constant <br />Incremental backwater coefficient <br />Total backwater coefficient <br />Approach length for upstream and rock protection <br />Length of basin <br />Length at a vertical hard drop, from the crest wall to the point where the flow <br />nappe contacts the basin floorinvert <br />Length of the drop face for a sloping drop <br />Length of the hydraulic jump (approximately 6 Y 2) <br />Length of channel width transition upstream of the drop crest <br />Length of channel width transition downstream of the drop toe <br />Weighted creep horizontal length (seepage) <br />Weighted creep vertical length ( seepage) <br />Bridge opening ratio, flow which can pass unimpeded through constriction to <br />total flow in channel <br />Manning roughness coefficient <br />Froude number V /(gy)~ <br />Maximum pressure fluctuation at a given location within a hydraulic jump <br />Discharge in cfs <br />Unit discharge = yV at a given point, in cfs/ft <br />Unit discharge in the main channel at drop = q~ Yem3/2 <br />Unit discharge in the trickle channel at drop = q~ y,,3/2 <br />Hydraulic radius <br />