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一、概述土层孔隙中容纳着水和空气。从水的容纳状态看,通常认为土层处于非饱和状态是适宜的。若是测定一下土层中容纳的水量,则发现它总是不定的。测定的时间间隔很短的话不好说,但经过相当时间之后测量的水量的差异很明显。更仔细研究土层,就发现土中水量随其深度而不同,其水流动的方式也随深度有着明显的差异。这是因为土层中有某种因素在起作用。简单地说,这是因为土层中的水通常是处于非饱和,并且呈极为缓慢地流动状态的缘故。尽管它是很有限的量,但是由于它在某个位置原有的水被引出
First, an overview of the pores in the soil to hold water and air. From the water storage state, it is generally considered that the soil is in a non-saturated state. If we measure the amount of water contained in the soil, we find that it is always indefinite. It is hard to say when the measurement interval is short, but the difference in the amount of water measured after a considerable period of time is significant. A closer study of the soil layer reveals that the amount of water in the soil varies with its depth, and the way in which it flows is also significantly different from its depth. This is because there is a certain factor in the soil at work. Simply put, this is because the water in the soil is usually not saturated and flows in a very slow flow. Although it is a very limited amount, it is diverted as it was at some point