新型W-OH材料对崩积体土壤分离速率的影响

发布时间：2018-07-01 12:17

本文选题：崩岗 + W-OH材料　；参考：《土壤学报》2017年01期

【摘要】：崩岗崩积体土壤颗粒容易脱离母体而发生侵蚀,而新型亲水性聚氨酯材料(W-OH)能有效增加土壤颗粒之间的粘结力,从而抑制侵蚀的发生。为此,通过变坡式水槽实验,研究不同浓度的W-OH材料(2.0%、3.0%、4.0%、5.0%)对崩岗崩积体土壤分离速率的影响。结果表明:W-OH材料能够显著降低崩积体土壤的分离速率,土壤分离速率的大小随W-OH浓度的升高而降低;由于固结表层的存在,W-OH材料显著改变了表层土壤的侵蚀过程,使得土壤分离速率与坡度、水流剪切力、水流功率等参数之间的函数关系相对于对照发生了改变,并且表层土壤发生分离的临界水流剪切力也得到了提升。
[Abstract]:Soil particles of avalanche are easy to erode away from parent body, and new hydrophilic polyurethane material (W-OH) can effectively increase the adhesion between soil particles and thus inhibit the occurrence of erosion. Therefore, the effects of different concentrations of W-OH (2.0% and 3.0%) on the rate of soil separation from caving were studied by means of sloping flume experiments. The results showed that the concentration of W-OH decreased significantly with the increase of W-OH concentration, and the soil erosion process was significantly changed by the presence of W-OH in the consolidated surface layer, and the soil separation rate decreased with the increase of W-OH concentration. The functional relationship between soil separation rate and slope, flow shear force, flow power and so on has changed compared with the control, and the critical flow shear force of the surface soil separation has also been improved.
【作者单位】：中国科学院土壤环境与污染修复重点实验室(南京土壤研究所);中国科学院大学;江苏大学环境与安全工程学院;
【基金】：国家科技支撑计划项目(2014BAD15B0302)资助~~
【分类号】：S157

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