By Bruce L. McCartney
''Inland navigation: Locks, Dams,and Channels (ASCE Manuals and experiences on Engineering perform No. 94)'' was once ready by means of a job committee of the Waterways committee, that is a part of the Waterways, Ports, Coastal, and Ocean department. The guide presents details on making plans, layout, building, and operation of the U.S. waterways utilized by barge site visitors. many of the info comes from layout standards and greater than a hundred years of expertise of the U.S. military Corps of Engineers. The Corps has equipped greater than 220 lock and dam initiatives on US waterways and keeps greater than 25,000 miles of inland navigation channels. This handbook additionally contains a list of the Corps lock and Dam tasks and six case histories
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2 Climatological Records. In the United States, climatological data such as precipitation, evaporation, wind speed, temperature, and the like, are archived in various formats by the National Oceanic and Atmospheric Administration (NOAA), a unit of the US Department of Commerce. These data can be retrieved from annual reports or by magnetic tape from the NOAA data base. Most studies that have limited streamflow records utilize synthetic single storm events to determine flood frequencies. The general depth-area-duration rainfall data required for these computations are published by NOAA.
FIGURE 4-5. Tow Leaving Bonneville Lock on the Columbia River. WATERWAY TRAFFIC 29 FIGURE 4-6. Tow Entering Bay Springs Lock on the Tennessee-Tombigbee Waterway. maneuverability and power of the towboat, and the ability to anticipate the effects of currents, navigation aids provided, and visibility. The power of the towboat and the action of the rudder affect the movement of the tow, as do the direction and velocity of currents, wind, ice, drift, and channel dimensions. The towboat rudder or rudders develop a side thrust when placed at an angle to the direction of flow.
However, existing station locations are limited and establishing new stations for specific projects may be advisable. 1 Stream Changes. Existing rating curves can be determined directly from stream records. However, these curves are affected by project-related changes to the downstream channel alignments, cross-sections, channel stabilization measures, and established navigation pools. Postproject or future condition rating curves must reflect these changes. The effects of these changes can only be estimated until the project design has been finalized, so the postproject rating curves are generally adjusted and refined throughout the project design process.
Inland navigation : locks, dams, and channels by Bruce L. McCartney