FLOOD07520

• County: Statewide
• Basin: Statewide
• Title: Roughness Coefficients for Densely Vegetated Flood Plains
• Date: 1/1/1987
• Prepared By: USGS
• Floodplain - Doc Type: Floodplain Report/Masterplan

ILLUSTRATIONS--Continued

Page

21. Coldwater River near Red Banks, Miss., cross section 2,
sample area 3------------------------------------------ 50
22. Bayou de Loutre near Farmerville, La.,
cross section 200-------------------------------------- 51
23. Bayou de Loutre near Farmerville, La.,
cross section 300, sample area 1----------------------- 52
24. Bayou de Loutre near Farmerville, La.,
cross section 300, sample area 2----------------------- 53
25. Bayou de Loutre near Farmerville, La.,
cross section 400-------------------------------------- 54
26. Bayou de Loutre near Farmerville, La.,
cross section 600-------------------------------------- 55
27. Cypress Creek near Downsville, La., cross section 300---- 56
28. Flagon Bayou near Libuse, La., cross section 200--------- 57
29. Flagon Bayou near Libuse, La., cross section 300--------- 58
30. Flagon Bayou near Libuse, La., cross section 400--------- 59
31. Alexander Creek near St. Francisville, La.,
cross section 100-------------------------------------- 60
32. Alexander Creek near St. Francisville, La.,
cross section 600-------------------------------------- 61
33. Comite River near Olive Branch, La.,
cross section 200-------------------------------------- 62

TABLES

Table

1. Station location and date of flood for field data-------
2. Summary of data used for computing n using the vegeta-
tion-density method-----------------------------------
3. Summary of data for computation of vegetation density
at sample areas---------------------------------------
4. Base values of Manning's n------------------------------
5. Factors that affect roughness of flood plains-----------
6. Tseng's drag-coefficient data---------------------------

12

16

18
20
22
27

IV