Table 8.1. Checklist of Data Needs.
Maps and Charts:
(1)
Geographic
(2)
Topographic
(3)
Geologic
(4)
Navigation Charts
(5)
Potamology Surveys
(6)
County and City Plats
Aerial and Other Photos:
(1)
Large Scale Photos for Working Plans
(2)
Small Scale Stereo Pairs of River and Surrounding Terrain
(3)
Color Infrared Photos for Flow Patterns, Scour Zones, and Vegetation
(4)
Ground Photos
(5)
Underwater Photos
Information on Existing Structures, Bridges, Dams, Diversion, or Outfalls:
(1)
Plans and Details
(2)
Construction Details
(3)
Alterations and Repairs
(4)
Foundations
(5)
Piers and Abutments
(6)
Scour
(7)
Dikes
(8)
Field Investigations:
Bridge structure and repairs to bridge and approach
Damage due to ice or debris
Hydraulic, Hydrology, and Soils:
(1)
Discharge Records
(2)
Stage-Discharge Records
(3)
Flood Frequency Curves for Stations Near Site
(4)
Flow Duration Curves (hydrographs)
(5)
Newspaper, Radio, Television, Accounts of Large Floods
(6)
Channel Geometry:
Main channel
Side channel
Navigation channel
Floodplain
Slopes
Backwater calculation
Bars
Sinuosity
Type (braided, meandering, straight)
Controls (falls, rapids, restriction, rock outcropping dams, diversions)
(7)
Sediment Discharge:
Size distribution
Bed and Bank Material Sizes
Roughness Coefficient n
(8)
Ice:
Recorded thickness
Dates of freeze up and break up
Flow patterns and jams
8.6
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