| Abstract: | Geophysical data were collected by means of ground-penetrating radar and tuned transducer systems to estimate the historical scour at ten bridges in Indiana. These geophysical data were used to compare and evaluate the results of 13 published pier-scour equations. In order to make this comparison, it was assumed that the measured historical scour was associated with the peak historical discharge. Because the geophysical data were not sufficient to map the lateral extent of the refilled scour hole, local scour could not be isolated from concentration scour. For the evaluation, computed contraction scour and pier scour were used in combination with the existing channel geometry to determine a computed bed elevation. This computed bed elevation was compared to be minimum historic bed elevation estimated from the geophysical data. None of the selected pier-scour equations, when combined with the contraction-scour equation, accurately represented the historical scour at all of the study sites. On the basis of the limited data presented, the equations currently recommended by the Federal Highway Administration provided a combination of accuracy and safety, required by design equations, equal to or better than the other equations evaluated. |
| Genre: | Conference Paper |
| ProdID: | 70017432 |
| Citation Author: | Mueller, David, S.; Miller, Robert, L. |
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| Citation Editor: | Shen Hsieh WenSu S.T.Wen Feng |
| Citation End Page: | 2236 |
| Citation Issue: | pt 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Proceedings - National Conference on Hydraulic Engineering |
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| Citation Number Of Pages: | 6 |
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| Citation Publisher: | Publ by ASCE |
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| Citation Search Results Text: | Evaluation of historical scour at selected stream crossings in Indian; 1993; Conference Paper; Proceedings - National Conference on Hydraulic Engineering; Mueller, David, S.; Miller, Robert, L. |
| Citation Start Page: | 2231 |
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| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Evaluation of historical scour at selected stream crossings in Indian; 1993; Conference Paper; Proceedings - National Conference on Hydraulic Engineering; Mueller, David, S.; Miller, Robert, L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
| Publisher: | Publ by ASCE |
