Chapter 11--Rosgen Geomorphic Channel Design

Chapter 11
Rosgen Geomorphic Channel Design
(210–VI–NEH, August 2007)
Part 654
National Engineering Handbook
Table 11–14 Morphological characteristics of the existing and proposed channel with gage station and reference reach
data—Continued
Variables Existing channel Proposed reach USGS station Reference reach
17 Low bank height (LBH) Mean: Mean: Mean: Mean:
18 Low bank height to max riffl e
depth (LBH/d mbkf )
19 Width of fl ood-prone area, ft
(W fpa )
Range: Range: Range: Range:
Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
20 Entrenchment ratio (W fpa /W bkf ) Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
21 Point bar slope Mean: Mean: Mean: Mean:
22 Bankfull mean velocity, ft/s (u bkf )
23 Bankfull discharge, ft 3 /s (Q bkf )
Range: Range: Range: Range:
24 Meander length, ft (Lm) Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
25 Meander length ratio (Lm/W bkf ) Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
26 Radius of curvature, ft (Rc) Mean: Mean: Mean: Mean:
27 Ratio of radius of curvature to
bankfull width (Rc/W bkf )
Range: Range: Range: Range:
Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
28 Belt width, ft (W blt ) Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
29 Meander width ratio (W b/t /W bkf ) Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
30 Individual pool length, ft Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
31 Pool length/riffl e width Mean: Mean: Mean: Mean:
32 Pool to pool spacing (based on
pattern), ft (p-p)
Range: Range: Range: Range:
Mean: Mean: Mean: Mean:
Range: Range: Range: Range:
11–55