الفهرس 
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Abstract
In the context of achieving bank connectivity to gratify the strategic, social and economic condition in Iraq, FBs (floating bridges) are selected, as they are economic in contrast to other bridge types. Accordingly, this research was commenced with the objective of perceiving a better understanding to floating bridge (FB) impact on bottom topography so as velocity distribution, under it.
In order to achieve the research objective, a methodology was planned to encompass 4 investigations (i.e. Theoretical, Experimental, Analytical and Inferential). During the ’Theoretical Investigation’, many articles and researches in the field
of Floating bridges were accumulated; scrutinized; categorized and presented. All through ’Experimental Investigation’ a physical model (i.e. flume) was implemented, where a FB was installed to connect the two sides of the flume. The investigation was achieved in Block Al-Ghanam factory in Salahuddin province in Iraq,
where 168 runs were carried out, during which discharge, water depth, bridge width, load and bed soil type were varied to assess the erosion under it and to investigate
innovative measures to protect it without damaging its structure.
During the ’Analytical Investigation’, an analysis was achieved to the
measurements to assess FB impact on bottom topography and velocity distribution. During the ’Inferential Investigation’, conclusions were drawn and recommendations for Engineering Practice and future research were suggested. The research designated that the amount of damage under the FB should be treated. In addition, the research flagged out that pontoon submergence is a dominant
parameter affecting bed morphology. Furthermore, the research confirmed that heavier load increases the draught and increases the velocity and erosion. Innovative about this research is prioritizing the implementation of a measure to
ensure the stability of floating bridges.