عنوان

Determining lateral river channel activity with respect to safety of pipeline crossings

Number

TLets523182

Title Proper

Determining lateral river channel activity with respect to safety of pipeline crossings

General Material Designation

[Thesis]

First Statement of Responsibility

Krasnoshchekov, Sergey Yurievich

Subsequent Statement of Responsibility

Carling, Paul

Name of Publisher, Distributor, etc.

University of Southampton

Date of Publication, Distribution, etc.

2009

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

University of Southampton

Text preceding or following the note

2009

Text of Note

When oil and gas pipelines cross rivers they are often buried in the ground beneath the floodplain and river bed. There is a risk that river will expose the pipe by lateral bank erosion, as well as bed erosion, and then there is a risk that the pipe will break. Pipe failure can cause loss of revenue, repair and reparation costs, political difficulties and adverse environmental impacts. Buried pipeline crossings correctly located and engineered do not affect the flow hydraulics and river regime. Therefore, pipeline crossing projects should be based on the study of natural processes including those which lead to lateral movement of the channel. This study deals with the scientific knowledge of a variety of channel types and their evolution by lateral movements. The literature review and statistical analysis reveal that the rates of bank erosion depend on the type of river channel pattern. Data from different channel types are obtained from the literature with reference to a variety of parameters which are then grouped depending upon the scale of the problem under consideration (catchment, reach and local scales). These data for bank erosion rates are analyzed to develop general relationships with such factors as size of river system, shape of channel, bed type, gradient, riparian vegetation etc. Statistical examinations show that there is strong correlation between bank erosion rate and the catchment area and with channel geometry. Weak correlations with water discharge and with flow variability suggest that bank erosion rates will not be changed significantly in the near future if discharge and/or its variability alter under climate change. Results are used to provide science-based recommendations to estimate lateral activity applicable to many regions of the world.

GE Environmental Sciences

TA Engineering (General). Civil engineering (General)

Krasnoshchekov, Sergey Yurievich

Carling, Paul

University of Southampton

Electronic name

p

[Thesis]

276903

a

Y