前言我省溢洪道工程,绝大多数是无闸控制的宽浅式进口,其特点是溢流水深较小。据初步调查,我省150多坐中型水库溢洪道中,无闸控制的宽浅式进口占82.4%,溢流水深小于4米的占77.5%。而小型水库溢洪道,则上述比例更大。另外,我们从对廿多个中小型水库溢洪道工程的调查中发现,低堰所占比例很大。其中P_1/H_d<1的低堰占60%。这些低堰中,采用克一奥和顶角修园的梯形堰约各占46%。前者 Preface My province spillway project, the vast majority is wide and shallow without gate control imports, which is characterized by a smaller overflow depth. According to the preliminary investigation, in our province, over 150 medium-sized spillways of medium-sized reservoirs occupy 82.4% of the spillways without gate control and account for 77.5% of the overflowed water depths less than 4 meters. The small reservoir spillway, the above ratio is even greater. In addition, from a survey of more than 20 small and medium-sized reservoir spillway projects, we found that the proportion of low weir accounts for a large proportion. The low weir with P_1 / H_d <1 accounted for 60%. Among these low weirs, trapezoid weirs using Keio and Vertex Park each make about 46% of the total. former