不同的软土地基基坑围护结构降水设计对地下水水头有不同的影响，从而产生不同的地面沉降。
Dewatering for different foundation pit fencing structures in soft ground has different impacts on the head of ground water, causing different ground settlement.
模型考虑了地下水中溶解盐分浓度变化引起的地下水密度的改变，及其导致的地下水水头的变化。
In the model the fluid density variation due to solution concentration change and the head distribution variation resulted from the fluid density change are considered.
分析表明，承压含水层中地下水水头波幅是上、下弱透水层贮水率和越流系数的减函数，是淤泥层相对透水系数的增函数；
The amplitude of the head fluctuation decreases with the storativity and leakage of both semi-permeable layers and increases with the leakance of the silt-layer.
论述了滤水管设计的基本要求和地下水由含水层进入滤水管时的水头损失。
This paper deals with the basic demands for designing filter tube and the head loss occurring when groundwater enters into the filter from aquifer.
参数的不确定性将导致计算的水头、流速的不确定性，并影响到地下水资源评价结果的可靠性。
The uncertainty of the parameters may induce uncertainty calculation of water head and velocity of flow, and influence the reliability of the results of groundwater resources appraising.
结果表明，地下水头计算值与工程现场的实测值吻合，此方法可以较好的模拟实际工程。
The results indicate that the calculated value of groundwater head is consistent with the field measurement value. Therefore, this method can be used to simulate the practical engineering well work.
在讨论这个问题时，又考虑进了排水沟中的水位也是随时间而变化的，因此在地下水流动过程中的任一瞬时，其地下水头差也是一个变量。
In the meantime the time variation of the water level in the ditch has been taken into account, therefore the groundwater head are time-varying as the groundwater flows toward the drain system.
进一步推导发现地面沉降与地下水头降深之间具有线性关系。
Further derivation leads to a linear relationship between land subsidence and aquifer drawdown.
在砂岩矿床的地浸试验和生产中，含矿含水层地下水承压水头很低时，地浸钻孔的开拓难度很大且工艺复杂。
During the test and production of in-situ leaching of sandstone deposit, it is very difficult and complicated to exploit boreholes when confined water head of ore-bearing acquifer is quite low.
储层压力的影响因素有构造应力、地下水头高度及埋深、地下水矿化度等。
The major influencing factors are tectonic stress, height and burial depth of groundwater, the mineralization ability in groundwater and so on.
储层压力的影响因素有构造应力、地下水头高度及埋深、地下水矿化度等。
The major influencing factors are tectonic stress, height and burial depth of groundwater, the mineralization ability in groundwater and so on.
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