基于图像处理的山区河道表面流场测算研究

摘要

山洪爆发的表面流场数据对研究洪水和泥石流的发生机理具有重要意义。采用基于图像处理的方法对都江堰龙溪河表面流场进行了测算，结果与旋桨式流速仪直接测量的数据基本一致，证明这种方法应用于山区河道的流速测量是可行的，且具有设备便携、非接触等优势。同时，对浑浊水体的测算结果也证明了这一方法在洪水期应用的可行性，并可使用流速-面积法估算流量。%Obtaining of surface velocity field data of flood is very significant for the research of flood and debris flow .The sur face velocity field in Longxi River , Sichuan Province was measured by using image processing method and the results were com pared with those of impellor flow meter .The results achieved by two methods agree with each other .The results have validated the accuracy of image processing method in the mountain channel , and the equipment has advantages of portable and non inva sively .Under turbid water condition , the method also shows its robust effectiveness , and the method of velocity area is available for discharge calculation .