一、问题的提出 研究地下水及堤坝非稳定渗流问题所涉及的给水度参数,目前研究得还很不够。众所周知,给水度μ为介质孔隙中自由流动水体与总体积之比值,也可以说,它是饱和介质释放水量的一种能力。因此它不仅与介质的颗粒组成,孔隙率n和孔隙大小密切相关,而且又和液体的性质及温度有关;另外,还取决于非稳定过程所持续的时 First, the problem proposed Groundwater and dam unsteady seepage problems involved in the water supply parameters, the research is still not enough. It is well-known that the water supply μ is the ratio of the free-flowing body of water to the total volume in the pores of the medium. It can also be said that it is a capacity of the saturated medium to release water. Therefore, it is not only related to the particle composition of the medium, porosity n and pore size are closely related, but also with the nature and temperature of the liquid; In addition, but also depends on the duration of instability