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这是根据规范中:“关于暢流河道测速垂线及测点分布”(详见第五册§6.§7.§16)的规定制作的一个工具,供外業操作时应用。这个工具能告诉我们在一定水面宽应有的垂线根数;同时,在任何水深的情况下,都能给我们指示出所需要的测点深。一、用法:1.(如图)游尺左面的刻度是求测点深用的。用时将游尺上“水深”的0.0对齐底板上的水面线,并将实测水深对齐河底线,然后通过底板上线条与游尺的交点,我们可以查出在0.2、0.6、0.8有效水深处的测点深。
This is a tool that has been prepared for use in field operations in accordance with the provisions of the Code: “On Vertical Velocity and Point Distribution of Unsteady Channels” (for details, see §§ §§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§ This tool can tell us the number of vertical lines we should have over a certain water surface. At the same time, at any depth, we can indicate the required depth of the measuring point. First, the usage: 1. (Figure) Ruler left of the scale is to find the point of deep use. When using the ruler on the “depth” of 0.0 aligned on the floor of the water line, and the measured water depth aligned with the river bottom line, and then through the floor on the line and the foot of the intersection point, we can find out at 0.2,0.6,0.8 effective water depth Measuring point deep.