Author
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Hanson, Gregory |
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Submitted to: Federal Interagency Sedimentation Conference Proceedings
Publication Type: Proceedings Publication Acceptance Date: 3/25/2001 Publication Date: 3/27/2001 Citation: Hanson, G.J. 2001. Field and laboratory jet testing method for determining cohesive material erodibility. Proceedings of the 7th Federal Interagency Sedimentation Conference. 2:V-1-V-8. Interpretive Summary: The erosion resistance of earthen materials impacts the performance of bridges, culverts, earthen spillways, road embankments, levees, and earthen dams. Erosion resistance of earthen materials also impacts river morphology and the restoration and management of a river system. Measurement of the erosion resistance of earthen materials is therefore vital in designing structures and restoring and managing river systems. A submerged jet- testing device has been developed for characterizing soil erodibility in the laboratory and in the field. This paper describes the history of the development and use of submerged jet testing apparatus and procedure for measuring the erosion resistance of cohesive materials. The test has evolved into a simple, quick, and relatively inexpensive test to perform. The test is repeatable and gives consistent results. The measured erosion resistance can be used in current equations to predict erosion. Technical Abstract: The erosion resistance of earthen materials impacts the performance of bridges, culverts, earthen spillways, road embankments, levees, and earthen dams. Erosion resistance of earthen materials also impacts river morphology and the restoration and management of river systems. Measurement of the erosion resistance of earthen materials is therefore vital in designing structures and restoring and managing river systems. A submerged jet- testing device has been developed for characterizing soil erodibility in the laboratory and in the field. This article describes the changes that have occurred in the development, use, and analysis procedures of the submerged jet test apparatus. The present analysis procedure follows jet diffusion principles to determine the excess stress parameters, erodibility coefficient, effective stress, and critical stress, for the erosion rate equation. The test is capable of producing boundary stresses from less than n1 Pa to 1000 Pa. The test is simple, quick, and relatively inexpensive to perform. The test is repeatable and gives consistent results. |
