水头差 meaning in Chinese

head difference
head differential

The settlement depends on not only the depth of dewatering but also the permeability of soil
地表沉降不仅取决于坑外降水深度和坑内外水头差，还与土层的渗透性有关。
This paper analysed working principles and controling features of water lifts about the head pressure transition . plc was used to operate controling system so as to work the system well
摘要对水头差压力转换提水装置的工作原理及控制特点进行了分析，使用可编程控制器( plc )控制系统运行，使系统很好的工作。
During the excavation of foundation pit , due to the wide variation in water lever , the huge head fall should result in drastic flow of the ground water , which will bring about a full influence on the deformation of the retaining wall and on the surrounding structures in a large - scale range
在深基坑开挖过程中，需大幅度降低基坑水位，巨大的水头差将使得土体孔隙中的水运动趋向激烈，从而影响到基坑支护结构的变形，并由此对较大范围内的邻近地段的安全产生影响。