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United States Department of Agriculture

Agricultural Research Service

Title: Non-Vertical Jet Testing of Cohesive Streambank Materials

Authors
item Hanson, Gregory
item Cook, Kevin
item Simon, Andrew

Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Proceedings
Publication Acceptance Date: August 6, 2002
Publication Date: September 15, 2002
Citation: Hanson, G.J., Cook, K.R., Simon, A. 2002. Non-vertical jet testing of cohesive streambank materials. American Society of Agricultural Engineers Paper No. 022119.

Interpretive Summary: Streambank movement and widening can seriously impact floodplain dwellers, stream channel and riparian ecosystems, bridge crossings, bank protection works, and other streamside structures. Movement and widening of cohesive streambanks is at least partially due to lateral bank and bed erosion. Therefore, there is a recognized need for research to develop improved methods for predicting the erodibility of cohesive bed and bank materials. A submerged jet-testing device has been developed for characterizing the erodibility of cohesive materials in the laboratory and the field. The apparatus has been used to characterize streambed materials and has recently been modified for characterizing streambank materials. The device has been developed based on knowledge of the hydraulic characteristics of a submerged jet and the characteristics of soil material erodibility. Analytical procedures have been developed and are described for determining coefficients obtained from the test that can be used in current equations to predict erosion. This paper describes the apparatus, methods, and analysis procedures for characterizing the erodibility of streambank materials.

Technical Abstract: Streambank movement and widening can seriously impact floodplain dwellers, stream channel and riparian ecosystems, bridge crossings, bank protection works, and other streamside structures. Movement and widening of cohesive streambanks is at least partially due to lateral bank and bed erosion. Therefore, there is a recognized need for research to develop improved methods for predicting the erodibility of cohesive bed and bank materials. A submerged jet-testing device has been developed for characterizing the erodibility of cohesive materials in the laboratory and the field. The apparatus has been used to characterize streambed materials and has recently been modified for characterizing streambank materials. The device has been developed based on knowledge of the hydraulic characteristics of a submerged jet and the characteristics of soil material erodibility. Analytical procedures have been developed and are described for determining the excess shear stress parameters, coefficient of erodibility and critical stress from submerged jet test results. This paper describes the apparatus, methods, and analysis procedures for characterizing the erodibility of streambank materials.

Last Modified: 7/31/2014
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