【摘要】 为了解层状土条件下指流平均推进速度与上层土壤性状的关系,分别以西北地区三种典型土壤(西峰土、榆林土、新疆沙土)为上层土、粗沙为下层土,在室内进行充分供水条件下层状土壤指流实验。实验结果表明,上层土的饱和导水率决定了下层沙土中指流的平均推进速度,且上层土的饱和导水率与指流平均速度呈线性关系。该结论对指流特征预测具有重要参考意义。更多还原

【Abstract】 The finger flow experiment on layered soils,with three typical soils(Xifeng soil,Yulin soil,Xinjiang sand soil) as upper soils and bulky grain as lower soils,in the condition of sufficient water supply indoors was carried out for the relationship between the rate of finger flow and upper soil characteristics.The results show that,the average rate of finger flow was controlled by the hydraulic conductivity rate of upper soil,and there was a good linear relationship between the hydraulic conductivity rate of upper soil and the average rate of finger flow.This is an important conclusion to the forecast of the finger flow characteristics.更多还原