The concrete faceplate and plinth upstream are key areas of water retaining and seepage prevention. The anti seepage effectiveness of face affects the imperious effect and the stability of the dam.
而此种坝型的上游面混凝土面板及址板是整个坝体挡水防渗的关键部位，面板防渗的好坏直接关系到大坝的防渗效果及其安全稳定性。
Sandy field can effectively prevent wind and water erosion and has an effect of retaining water and preserving fertilizer.
砂田还可有效地防止风蚀和水蚀，具有保水保土保肥的作用。
The variation of groundwater levels could reflect the watertight effect of the retaining structures, which could be used as an important indicator to find out whether there is water leakage.
地下水位的变化能很好反应围护桩的止水效果，可作为判断基坑是否出现漏水的指标。
It contains nutritious elements and rich water, and has high diffusion resistance in soil of retaining in the applied position reaching the delay-releasing effect.
含有营养元素的富水液体在土壤中的扩散阻力陡增，长时滞留于追施部位，达到了液体肥料缓释的效果。
It contains nutritious elements and rich water, and has high diffusion resistance in soil of retaining in the applied position reaching the delay-releasing effect.
含有营养元素的富水液体在土壤中的扩散阻力陡增，长时滞留于追施部位，达到了液体肥料缓释的效果。
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