本文提出了阻力线性假设，并结合河槽断面的具体情况，对河槽的断面平均流速公式进行了探讨。
This paper proposes a scientific hypothesis that the resistance is linear and suggests a sectional average velocity formula for river flow which reflects the character of river.
通过对横断面进行线性校正，可以得到路面的车辙信息。
Through a linear correction, the rutting information of the road can be accurate get.
采用非线性模型，提出了输水渡槽的最优园底直角横断面。
This paper presents an optimal cross section of conveyance aqueduct with a nonlinear programming model, which is the circular bottom triangle.
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