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<br />APPENDIX II. - NOTATION <br /> <br />The following symbols are used in this paper: <br /> <br />A .,cross sectional flow area; <br />C .. discharge coef'i'icient for weir flow equation; <br />CD .. drag coef'i'icient; <br />F . force exerted by bridge piers on fluid; <br />g . acceleration due to gravity; <br />H .. head in orifice and weir flow equations; <br />k .. total loss coefficient for orifice flow equation; <br />K .. pier-shape coefficient in Yarnell equation; <br />L .. effective flow length in weir flow equation; <br />M .. DIOIIIentum nux; <br />MCRIT .. momentum flux for flow at critical depth; <br />Q .. discharge; <br />v .. mean flow velocity; <br />y .. vertical distance from water surface to centroid of flow area; <br />a .. momentum coefficient; <br />Y .. specific weight of water; <br />P . density of water. <br />