最大可能输沙量的工程计算

输沙量是一个重要的物理量和极其有用的工程参数。它是一个复合向量,具有明显的空间分布的非均一性和随时间变化的非定常性。文中把最大可能输沙量定义为输沙量的理论极限值,并根据最大可能输沙率的实验关系式,利用风的自计记录,计算了一个地区不同风向(16个方位),一年内最大可能输沙量的总和。按向量合成原理,计算了该地区的最大可能合成输沙量与合成输沙方向,其结果与该地区主体沙丘的平均移动速度和移动方向具有较好的一致性。

ENGINEERING CALCULATION OF MAXIMUM POSSIBLE SAND TRANSPORTING QUANTITY

The sand transporting quantity is an important physical value and useful engineering parameter. It is a complex vector which have obvious heterogeneity of the distribution in space and a variability with time. The maximum possible sand transporting is defined as theoretical limiting value of sand transporting quantity in the paper. We have calculated the summation of maximum possible sand transporting quantity in a selected region in a year in different wind directions (16 directions) on the basis of the automatic record wind and the experimental formula of maximum possible sand transporting quantity. The maximum possible resultant sand transporting quantity and resultant sand transporting direction are also calculated with the principle of vector resultant. The results show that the maximum possible resultant sand transporting quantity and direction are consistent with the average moving speed and direction of main sand dunes.