Publication date: 15 January 2016
Source:Geoderma, Volume 262
Author(s): Harsh Vardhan Singh, Anita M. Thompson
Agricultural fields act as major sources of sediment pollution for surface waters. Grassed waterways are often used as a best management practice to prevent gully erosion and control the amount of sediment delivered from the edge of agricultural fields to receiving water bodies. A widely accepted method for estimating erosion of cohesive soils (excess shear stress equation) involves determining the critical shear stress of the soil and comparing it to the shear stress exerted by the flow. Antecedent soil moisture is an important factor influencing runoff and erosion and understanding the relationship between antecedent moisture and critical shear stress for key features within an agricultural watershed (e.g. field and grassed waterway) can improve soil erosion prediction. Critical shear stress was measured in situ using a Cohesive Strength Meter for varying soil moisture conditions in a 3
Source:Geoderma, Volume 262
Author(s): Harsh Vardhan Singh, Anita M. Thompson