W-OH材料对赣南山区土壤减渗抗蚀作用的影响

赣州市属亚热带季风区,降水集中,雨量充沛,以山地、丘陵为主,土壤类型为花岗岩风化物发育的红壤,砂粒含量极高,不利的自然地理条件极易造成水力侵蚀。而新型亲水性聚氨酯材料(W-OH)能增加土壤颗粒之间的黏结力,有效抑制土壤侵蚀的发生。为此,通过土壤渗透试验和土壤可蚀性模型测算,研究不同浓度W-OH溶液(2.0%、3.0%、4.0%)对赣南山区边坡土壤减渗抗蚀作用的影响。结果表明,W-OH材料能够显著降低赣南山区边坡土壤的土壤饱和导水率,减渗效果随W-OH浓度的升高而增加;W-OH材料可显著改变表层土壤的侵蚀过程,明显增强边坡土壤的抗蚀能力,其中,施用3.0%浓度W-OH溶液对试验区土壤抗蚀性效果最明显。

Ganzhou City is a subtropical monsoon area with concentrated precipitation and abundant rainfall,mainly in mountains and hills,and the soil type is red soil developed by granite weathering.The content of sand is extremely high,and unfavorable natural and geographical conditions are easy to cause hydraulic erosion.The new hydrophilic polyurethane material(W-OH)can increase the adhesion between soil particles and effectively inhibit the occurrence of soil erosion.For this reason,through soil infiltration test and soil erodibility model calculation,the effects of different concentrations of W-OH solution(2.0%,3.0%,and 4.0%)on soil seepage reduction and anti-erosion of mountain slope in southern Jiangxi were studied.The results show that W-OH material can significantly reduce the soil saturated hydraulic conductivity of slope soil in Gannan mountain area,and the seepage reduction effect increases with the increase of W-OH concentration;W-OH material significantly changes the erosion process of surface soil and significantly enhances the anti-erosion ability of slope soil,among which the application of 3.0%concentration W-OH solution has the most obvious anti-erodibility effect on the soil in the experimental area.