Frequency of Discharge Causing Abutment Scour in South Carolina

Autor:	Khaldoun Shatanawi, Abdul A. Khan, Nadim M. Aziz
Rok vydání:	2008
Předmět:	South carolina Hydrology Mechanical Engineering medicine.medical_treatment Abutment Bridge scour STREAMS Site analysis Streamflow medicine Erosion Geotechnical engineering Bridge (dentistry) Geology Water Science and Technology Civil and Structural Engineering
Zdroj:	Journal of Hydraulic Engineering. 134:1507-1512
ISSN:	1943-7900 0733-9429
DOI:	10.1061/(asce)0733-9429(2008)134:10(1507)
Popis:	The purpose of this study is to evaluate the adequacy of the 100-year discharge along with the Froehlich bridge abutment scour equation adopted by the U.S. Federal Highway Administration (FHwA) in predicting abutment scour for bridge design purposes in South Carolina streams. The analysis utilized bridge properties, stream cross-sectional and hydraulic data, local flood frequency equations, a one-dimensional steady river flow computer model (WSPRO), and procedures recommended by the FHwA for predicting abutment scour. A method was developed to identify the single stream-discharge at each bridge that can cause the abutment scour that was observed at 73 bridge abutments. Analysis of the results revealed that for one-third of the abutments in the sandy soil region of South Carolina, the flow rates required to produce the observed scour depths had return periods greater than 100 years. Although for bridges in the region dominated by clay soil, the return periods were significantly smaller than 100 years.
Databáze:	OpenAIRE
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