Campus Units

Agronomy

Document Type

Article

Publication Version

Published Version

Publication Date

2011

Journal or Book Title

Procedia Environmental Sciences

Volume

11

Issue

Part B

First Page

763

Last Page

773

DOI

10.1016/j.proenv.2011.12.118

Abstract

The objective of this study is to determine how PAM applications to a fraction of the surface affect hydraulic parameters of flow, soil water infiltration and soil sediment yield during rainfall on steep sloping land. Five PAM application rates (PAMR) 0, 0.4, 0.7, 1.0 and 1.3 g kg-1 were used for 5 sloping plots in this study. As PAMR increased from 0 to 1.3 g kg-1 at the rainfall intensity (RI) of 1.58 mm min-1, the Froude numbers decreased from 34.7 to 9.1, the Reynolds numbers (Re) decreased from 568 to 305, and the Darcy–Weisbach coefficients increased from 0.0028 to 0.041. The total runoff values were 33.8, 35.9, 31.6, 25.6 and 18.1 mm when the PAMR were 0, 0.4, 0.7, 1.0 and 1.3 g kg-1, respectively. The cumulative sediment increased rapidly with the rainfall time. In conclusion, PAM applications to a fraction of soil surface can be effective at reducing the erosion of steep sloping land.

Comments

This article is published as Li, Yi, Mingan Shao, and Robert Horton. "Effect of polyacrylamide applications on soil hydraulic characteristics and sediment yield of sloping land." Procedia Environmental Sciences 11 (2011): 763-773. doi: 10.1016/j.proenv.2011.12.118. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Copyright Owner

Elsevier Ltd

Language

en

File Format

application/pdf

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