- 補: Ⅰ動詞1 （修理; 修補） repair; mend; patch 2 （補充; 補足;填補） fill up; add supplement; supply; ...
- 透: Ⅰ動詞1 （滲透; 穿透） penetrate; pass [seep] through 2 （暗地裡告訴） tell secretly; let out; lea...
- 水: 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
- 層: i 量詞1 （用於重疊、積累的東西 如樓層、階層、地層） storey; tier; stratum 2 （用於可以分項分步的...
- 透水: permeable; pervious to water透水壩 permeable dike; filter dam; 透水層 [地] pervious bed; permeabl...
The aquifer is unconfined locally and may be recharged.
The black earth is a kind of alfisol, with a thick layer of humus, loose texture, high fertility, high porosity ratio, poor permeability and a high content of clay, which is suitable for cultivation
( 4 ) water flow model experiment is made and hydraulic pressure variation is observed, " the detainment and displacement " of semipervious aquifers in the process of decreasing water is also studied
Beven 18 suggested that when it is applied in its original form to a river basin with thin soils over an imperme - able base, the quasi - steady state approximation holds. however, he also noted that for a variety of alternative transmissivity profiles, or when the saturated depth of the aquifer is large, the deviation in the actual shape of the water table from a steady - state shape can be both large enough and last long enough to call into question the assumption of quasi - steady dynamics
The condition of water pressure acting on the both sides of cement - soil retaining wall is researched by computing the seepage field around the wall. it is illustrated that the coefficient of water pressure, which isn ' t constant along the height, is affected seriously by some factors, e. g., the distribution and relative hydraulic permeability of the soil beside the wall, the hydraulic permeability of its foundation, and the buried depth of the impervious layer. as a whole, the lateral pressure acting on the wall based on seepage is always smaller than that without regard to seepage in the non - excavated zone. moreover, the pressure based on seepage is greater than that without regard to seepage in the excavated zone if the coefficient of passive pressure is smaller than 1. 176. this case is of great advantage to the stability of the wall