MARC Record from Library of Congress

LEADER: 03862nam a22003857a 4500
001 2008377805
003 DLC
005 20080815165154.0
008 080718s2007 iaua bt 000 0 eng d
010 $a 2008377805
035 $a(OCoLC)ocn180133617
040 $aUIG$cUIG$dOCLCQ$dOHDOT$dDLC
042 $alccopycat
043 $an-us-ia
050 00 $aTC180$b.P37 2007
088 $aTR-534
100 1 $aPapanicolaou, Athanasios.
245 10 $aDesign procedures and field monitoring of submerged barbs for streambank protection /$cby Thanos Papanicolaou and Mohamed Elhakeem.
260 $aIowa City, Iowa :$bIIHR Hydroscience & Engineering, University of Iowa,$c2007.
300 $aix, 41 p. :$bill. (some col.) ;$c2007.
500 $a"June 2007."
504 $aIncludes bibliographical references (p. 36-37).
513 $aFinal report.
520 $aThe main objective of this study was to evaluate the hydraulic performance of riprap spurs and weirs in controlling bank erosion at the Southern part of the Raccoon River upstream U.S. Highway 169 Bridge utilizing the commercially available model FESWMS and field monitoring. It was found based on a 2 year monitoring and numerical modeling that the design of structures was overall successful, including their spacing and stability. The riprap material incorporated into the structures was directly and favorably correlated to the flow transmission through the structure, or in other words, dictated the permeable nature of the structure. It was found that the permeable dikes and weirs chosen in this study created less volume of scour in the vicinity of the structure toes and thus have less risk comparatively to other impermeable structures to collapse. The fact that the structures permitted the transmission of flow through them it allowed fine sand particles to fill in the gaps of the rock interstices and thus cement and better stabilize the structures. During bank-full flows the maximum scour hole was recorded away from the structures toe and the scour-hole size was directly related to the protrusion angle of the structure to the flow. It was concluded that the proposed inclination with respect to the main flow direction was appropriate since it provides maximum bank protection while creating the largest volume of local scour away from the structure and towards the center of the channel. Furthermore, the lowest potential for bank erosion also occurs with the present set-up design chosen by the IDOT. About 2 ft of new material was deposited in the area located between the structures for the period extending from the construction day to May 2007. Surveys obtained by sonar and the presence of vegetation indicate that new material has been added at the bank toes. Finally, the structures provided higher variability in bed topography forming resting pools, creating flow shade on the leeward side of the structure, and separation of bed substrate due to different flow conditions. Another notable environmental benefit to rock riprap weirs and dikes is the creation of resting pools, especially in year 2007 (2nd year of the project.) The magnitude of these benefits to aquatic habitat has been found in the literature that is directly related to the induced scour-hole volume.
530 $aAlso available via the Internet.
536 $aSponsored by the Iowa Highway Research Board and the Iowa Dept. of Transportation$fIHRB project TR-534.
650 7 $aBanks (Waterways)$2trt
650 7 $aErosion control.$2trt
650 7 $aRiprap.$2trt
650 0 $aHydraulic structures$zIowa$xDesign and construction.
650 0 $aStreamflow$zIowa.
700 1 $aElhakeem, Mohamed.
710 1 $aIowa.$bHighway Research Board.
710 1 $aIowa.$bDept. of Transportation.
856 41 $ahttp://www.operationsresearch.dot.state.ia.us/reports/reports_pdf/hr_and_tr/reports/tr534.pdf