Laserfiche WebLink
<br />TABLE OF CDNTEN'IS <br /> <br />Page <br />Introduction------------------------------------------------------- 1 <br />Approach----------------------------------------------------------- 2 <br />Method for assigning n values for channels------------------------- 3 <br />Selection of base n values (nb)------------------------------- 4 <br />Adjustment factors for channels------------------------------- 8 <br />Irregularity (nl)---------------------------------------- 8 <br />Variation in channel cross section (n2)------------------ 8 <br />Obstructions (n3)---------------------------------------- 12 <br />Vegetation (n4)------------------------------------------ 12 <br />Meandering (m)------------------------------------------- 13 <br />Methods for assigning n values for flood plains-------------------- 13 <br />Modified channel method--------------------------------------- 13 <br />Adjustment factors for flood plains---------------------- 16 <br />Surface irregularities (nl)------------------------- 16 <br />Obstructions (n3)----------------------------------- 16 <br />Vegetation (n4)------------------------------------- 16 <br />Vegetation density methods------------------------------------ 17 <br />Techniques for determining vegetation density------------ 17 <br />Indirect technique---------------------------------- 18 <br />Direct technique------------------------------------ 18 <br />Photographs of flood plains---------------------------------------- 23 <br />Procedures for assigning n values---------------------------------- 39 <br />Description of steps for assigning n values------------------- 39 <br />Channel roughness (steps 3-13)--------------------------- 39 <br />Flood-plain roughness (steps 14-23)---------------------- 50 <br />Examples of procedures for determining n values---------- 51 <br />Summary------------------------------------------------------------ 60 <br />Selected references------------------------------------------------ 61 <br /> <br />ii <br />