ILLUSTRATIONS

Page

Figure

39.--Diffusion hydrodynamic modeled floodplain at
time = 1-hour

75

40.--Diffusion hydrodynamic modeled floodplain at
time = 2-hours
75

41.--Diffusion hydrodynamic modeled floodplain at
time = 3-hours
76

42.--Diffusion hydrodynamic modeled floodplain at
time = 5-hours
76

43.--Diffusion hydrodynamic modeled floodplain at
time = 7-hours
77


44.--Diffusion hydrodynamic modeled floodplain at
time = 10-hours
77

45.--Maximum water depth at different cross-sections
78

46.--Bridge flow hydrographs assumed outflow
relation: (q =10d)
79

47.--Critical outflow hydrographs for floodplain
79

48.--Diffusion model (), kinematic routing
(dashed line) and k-634 model results
(solid line) for 1,000-feet width channel,
Manning's n = 0.040, And various channel
slopes,
82

49.--Comparisons of outflow hydrographs at 5 and 10
miles downstream from the dam-break site
83

50.--Comparisons of depths of water at 5 and 10 miles
downstream from the dam-break site
85

A-1.--Flow chart for diffusion hydrodynamic model
94

A-2.--Flow chart for channel and floodplain submodel
95

B-1.--One-dimensional grid elements
101

B-2.--Diffusion hydrodynamic model boundary conditions
103

B-3.--No flux boundary nodes
104

B-4.--Algorithm for the variable time step
105

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