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Water Path through Solid Waste Layr and Contaminant Transport

穿过固体废物层的水路和污染物输送

基本信息

批准号：
06650604
负责人：
SAKAMOTO Yasushi
金额：
$ 1.28万
依托单位：
Yamanashi Univ.
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650604/
关键词：
Water path Preferential flow Unsaturated media Model solid waste Convection-dispersion transport Eractal dimension Water path invasion model 水みち流れ物質移動障害面フィルム状物質透水係数流出応答

项目摘要

Water path flow through unsaturated model solid waste was examined by experiments and simulations.1. Permeability and Runoff Response of Unsaturated Model Solid WastePermeability of unsaturated model solid waste was examined experimentally. Model solid waste consisted of square flexible films (10cm*10cm) and glass beads (0.074mm-13mm). Results showed that presence of films reduced permeability, that presence of film put the experimental results close to Gaussian distribution, that presence of films decreased sensitivity of permeability to water content, and that relation between permeability and water content showed hysteresis.2. Solute Transport through Water PathSolute transport through water path was examined by experiments using unsaturated glass bead layr. Results showed that the combined effect of gravity and capillary forces produced water paths, that convection was more important than diffusion within water path, and that the fractal dimension of water path decreased as particle size increased. Effects of an obstacle plane on the convection-dispersion transport were also examined. Results showed that convection caused by capillary force occured behind the obstacle, and that the concentration of detouring water caused the asymmetrical temporal change of overall discharge concentration of solute.3. Simulation using 'Water Path Invasion Model'Simulation using 'water path invasion model' could produce water path flow of similar fractal dimension and similar convection behind the obstacle to those of experiments,

通过实验和模拟研究了非饱和模型固体废物的水路流动。对非饱和模型固体废物的渗透性进行了试验研究。模型固体废物由方形柔性薄膜（10cm*10cm）和玻璃微珠（0.074mm-13mm）组成。结果表明：膜的存在降低了渗透率，膜的存在使实验结果接近高斯分布，膜的存在降低了渗透率对含水率的敏感性，渗透率与含水率之间存在滞后关系。利用不饱和玻璃珠层研究了溶质在水路中的运移。结果表明：在重力和毛细力的共同作用下产生了水道，水道内对流比扩散更重要，水道分形维数随粒径的增大而减小；研究了障碍物对对流-弥散输运的影响。结果表明，障碍物后发生了毛细力引起的对流，绕行水浓度引起溶质总排放浓度的不对称时间变化。采用“水路入侵模型”模拟可以得到与实验结果相似的分形维数和障碍物后相似的对流。