水量损失是低压水工隧洞设计中的一个重要问题。瑞士最近开发的软件Ｚ－ＳＯＩＬ３Ｄ为从事水工设计的工程师用二维或三维方式计算水量损失提供了一种有效的工具。模型以有限元法为基础来求解承压介质内水流问题，相对于传统解析解法来说，是一种具有吸引力的替代解法，可以节约时间，考虑通常未被考虑的参数。 Water loss is an important issue in the design of low pressure hydraulic tunnels. The recently developed software Z-SOIL3D in Switzerland offers engineers designing hydraulics an effective tool for calculating water loss in two or three dimensions. The model solves the water flow problem in pressure medium based on the finite element method, which is an attractive alternative solution to the traditional analytical solution, saving time and considering the parameters that are not usually considered.