Depositional seals in polyacrylamide-amended soils of varying clay mineralogy and texture |
| |
| Authors: | Ajay K Bhardwaj Richard A McLaughlin Guy J Levy |
| |
| Institution: | (1) Great Lakes Bioenergy Research Center (GLBRC), Michigan State University, W. K. Kellogg Biological Station, 3700 E. Gull Lake Drive, Hickory Corners, MI 49060, USA;(2) Department of Soil Science, North Carolina State University, 100 Derieux Street, Raleigh, NC 27607, USA;(3) Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel |
| |
| Abstract: | Purpose Depositional seals, formed when turbid waters infiltrate into soils, lead to a reduction in soil hydraulic conductivity (HC)
and enhance runoff and soil erosion. Since clay size particles constitute a dominant proportion of depositional seals, soil
texture and clay mineralogy play a significant role in determining the seal’s hydraulic characteristics. Presence of high
molecular weight anionic polyacrylamide (PAM) in suspension flocculates fine sediments, and therefore, its application to
the soil surface may modify the characteristics of the depositional seal. The impact of PAM on the latter is expected to be
influenced by soil properties. The aim of this study was to elucidate the effects of PAM application on clay flocculation
and the HC of depositional seals formed in four soils varying in texture (ranging from loamy sand to clay loam), and diverse
proportions of clay mineral constituents (kaolinite, smectite, and vermiculite). |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
