随着国民经济的发展,为适应工农业生产发展的需要,充分利用广阔的水源资能,在全国辽阔的大小江河上新建了各种不同形式永久性和半永久性水库。因此对跨越水库下游河段的桥梁就出现了一系列的复杂问题,如水流特性、流量的推算、冲刷计算等 With the development of the national economy, in order to meet the needs of industrial and agricultural production and development and make full use of vast water resources, various types of permanent and semi-permanent reservoirs of various forms have been newly built across the country’s vast rivers. As a result, a series of complex issues have emerged with bridges spanning the lower reach of the reservoir, such as water flow characteristics, flow rate calculations, erosion calculations