impermeable strata meaning in English

不透水层

Abstract : in this article , starting from solute s transport a nd diffusion equati on , aiming at the saturation state of liquid in homogeneous soil of impermeable stratum and on the condition that lots of saturated solute ( e . g . nutriment ) on t op of the soil maintain diffusion , a strict mathematical deduction is carried ou t , and the analytical solution of solute s concentration distribution in homogeneous s o il is given
文摘:从溶质输移扩散方程出发，针对强透水层上均质土壤的液体饱和状态，在顶层含有大量饱和溶质(如养分等)维持着渗透扩散的条件下，进行严密的数学推证，给出均质土壤中溶质浓度分布的解析解。