Laserfiche WebLink
Step 6. Computation of nt for the reach. The first estimate of roughness <br />for the reach, ns, is obtained by neglecting meandering and adding the basic n <br />value obtained in step 1 and modifying values from steps 2 through 5. <br />ns = n + E modifying values <br />Straight channel subtotal, ns 0.04 <br />Step 7. Meander. The modifying value for meandering is not independent of <br />the other modifying values. It is estimated from the nr obtained in step 6. and <br />the ratio of the meandering length to the straight length. The modifying value <br />for meandering may be selected from Table 8.04f. <br />Length of meandering -- <br />channel (ft) <br />Length of straight line (ft) <br />Meander ratio (ft/ft) <br />Modifying value: <br />meandering of channel <br />Meandering modification <br />1 <br />0 <br />-----10- <br />0 <br />Minor ©:00 ; 0 Table 8.04f <br />0.000 <br />Step S. Computation of n for a channel reach with meandering. Add the <br />modifying value obtained in step 7, to ns, obtained in step 6. <br />Final roughness coefficient, <br />n 0.040