Insights into the origin and characteristics of the sedimentation process at multi-barrel culverts in Iowa : technical transfer summary.
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2010-06-01
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Alternative Title:Insights into the origin and characteristics of the sedimentation process at multi-barrel culverts in Iowa : technical brief;Insights into the origin and characteristics of the sedimentation process at multi_barrel culverts in Iowa : technical transfer summary;Insights into the origin and characteristics of the sedimentation process at multi_barrel culverts in Iowa : technical brief;TR-596 insights into the design and characteristics of the sedimentation process at multi-barrel culverts in Iowa : technical transfer summary;TR-596 insights into the design and characteristics of the sedimentation process at multi-barrel culverts in Iowa : technical brief;
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Edition:Technical transfer summary.
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Abstract:The present study is an integral part of a
broader study focused on the design and
implementation of self-cleaning culverts, i.e.,
configurations that prevent the formation of
sediment deposits after culvert construction or
cleaning. Sediment deposition at culverts is
influenced by many factors, including the size
and characteristics of material of which the
channel is composed, the hydraulic
characteristics generated under different
hydrology events, the culvert geometry
design, channel transition design, and the
vegetation around the channel. The multitude
of combinations produced by this set of
variables makes the investigation of practical
situations a complex undertaking.
In addition to the considerations above, the
field and analytical observations have revealed
complexities of the flow and sediment
transport through culverts that further
increase the dimensions of the investigation.
The flow complexities investigated in this
study entail: flow non-uniformity in the areas
of transition to and from the culvert, flow
unsteadiness due to the flood wave
propagation through the channel, and the
asynchronous correlation between the flow
and sediment hydrographs resulting from
storm events. To date, the literature contains
no systematic studies on sediment transport
through multi-box culverts or investigations
on the adverse effects of sediment deposition.
Similarly, there is limited knowledge about
the non-uniform, unsteady sediment transport
in channels of variable geometry.
Furthermore, there are few readily useable
(inexpensive and practical) numerical models
that can reliably simulate flow and sediment
transport in such complex situations.
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