Research and development of seepage instrument around dam

The physical model of narrow slit has been adopted to simulate groundwater movement and it has many excellences in visualization and intuition. Its fundamental is to utilize the character and law of liquid movement in narrow slit under laminar flow and the specialty of seepage similitude below a dam. The success about the research and development of seepage instrument around dam can provide theoretical basis for solving leakage problems below a dam. Meanwhile, it shows important referenced merit to apply seepage theory of narrow slit as the related physical model which finds out the law of other groundwater movement so as to solve the practical problems of groundwater movement.