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ARS Home » Midwest Area » West Lafayette, Indiana » National Soil Erosion Research Laboratory » Research » Publications at this Location » Publication #306138
Title: Developing relations between soil erodibilty factors in two different soil erosion prediction models (USLE/RUSLE and wWEPP) and fludization bed technique for mechanical soil cohesion

Author
item DEVIREN SAYGIN, SELEN - University Of Ankara
item Huang, Chi Hua
item Flanagan, Dennis
item ERPUL, GUNAY - University Of Ankara

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/3/2014
Publication Date: 11/2/2014
Citation: Deviren Saygin, S., Huang, C., Flanagan, D.C., Erpul, G. 2014. Developing relations between soil erodibilty factors in two different soil erosion prediction models (USLE/RUSLE and wWEPP) and fludization bed technique for mechanical soil cohesion [abstract]. American Society of Agronomy Annual Meeting, November 2-5, 2014, Long Beach, CA. 2014 CDROM.

Interpretive Summary:

Technical Abstract: Soil erosion models are valuable analysis tools that scientists and engineers use to examine observed data sets and predict the effects of possible future soil loss. In the area of water erosion, a variety of modeling technologies are available, ranging from solely qualitative models, to merely quantitative equations. The main purposes of this study performed in USDA-National Soil Erosion Research Laboratory (NSERL) can be summarized as developing soil erodibility equations in the defined models by obtaining new data set under rainfall experiments and to link the USLE/RUSLE-based erosion prediction technology and the process-based WEPP model which is partitioned depending upon the water erosion processes splash detachment, interrill and rill erosion. In this context, soil erodibility potentials of two different soil samples were collected from the State of Washington and qualified under simulation conditions and the relationships between process-based erodibility parameters such as interrill and rill erodibility and critical shear stress and the empirically based USLE/RUSLE-K term were investigated. Rainfall simulations were performed under a sequence of rainfall intensities: 50 mm h-1 for one hour, 25 mm h-1 for 20 minutes, 75 mm h-1 for 10 minutes, and 100 mm h-1 for 10 minutes to obtain erosion data sets with 4 different intensities. This data was used to derive interrill erodibility. A mini-flume with a gradually increasing flow rate conditions was used in order to derive rill erodibility and critical shear stress. A Fludization Bed Technique, a new approach for measuring mechanical soil cohesion in laboratory conditions, was performed to obtain new relationships between models and technique.