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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Hydrau Iic Studies <br /> <br />The adequacy of preliminary solutions for channel improvements was veri- <br />fied using the U. S. Corps of Engineers computer program HEC II, Water Surfoce <br />Profiles. The program computes the water surface profile for river channels of any <br />cross-section for flows greater or less than critical. The effects of bridges, cul- <br />verts, weirs and dams con be considered in the computations, The procedure used <br />is similar to Method 1, Backwater Curves in River Channels, Engineering Iv\onual <br />1110-2-1409, USCE. This method applies the Bernoulli Theorem for total energy <br />at each channel cross-section and M:lnning's Formula for friction head loss belween <br />cross-sections. <br /> <br />The final water surface profi Ie and 10o-year flood plain shown on the <br /> <br />drawings were computed by the use of the HEC II progrom. <br /> <br />11-6 <br />