Wind erosion control of soils using polymeric materials

摘要

Wind erosion of soils is one of the most important problems in environment and agriculture which could affects several fields. Agricultural lands, water reservoires, irrigation canals, drains and etc. may be affected by wind erosion and suspended particles . As a result wind erosion control needs attention in arid and semi - arid regions. In recent years, some polymeric materials have been used for improvement of structural stability, increasing aggregate stability and soil stabilization, though kind of polyme r, quantity of polymer, field efficiency and durability and environmental impacts are some important parameters which should be taken into consideration. In this study, a Polyvinil Acetate - based polymer was used to treat different soils. Then polymer - added soil samples were investigated experimentally in a wind tunnel to verify the effecte of polymer on wind erosion control of the soils and the results were compared with water treated soil samples. The results of wind tunnel experiments with a maximum 26 m /s wind velocity showed that there was a significat difference between the erosion of polymer treated and water treated soil samples. Application of 25g/m 2 polymer to Aeolian sands reduced the erosion of Aeolian sands samples to zero related to water treat ed samples. For silty and calyey soils treated by polymer, the wind erosion reduced minimum 90% in relation to water treated samples.