Impermeableclay limits downward percolation of water and fulvic acids, reducing chemical weathering and podzolization.
不可渗透的粘土限制了水和黄腐酸的向下渗透，从而减少了化学风化和土壤灰化作用。
2
The landfill sits on a natural foundation of London clay which is more or less impermeable.
垃圾掩埋场以伦敦黏土为天然地基，其防渗效果极佳。
3
The bentonite and rectorite clay have the letter permeate coefficient and the better expansibility and can be used as adsorption and impermeable materials.