葛洲坝大江下航道水流条件分析

Flow Conditions in Main Approach Channel before Gezhouba

航道水流条件是保证船舶航行安全的主要问题之一。葛洲坝大江下游引航道由于受枢纽泄洪影响，航道内存在明显的泄水波和高流过区，造成船舶航行困难，影响安全。因此，现行船舶只在流量20000m3／s以下通行。为此，近年来，对原型水流条件作了大量观测，探讨提高通航流量的可能性。经分析认为，在现行条件下，通航流量可提高到423000m3／s。

The flow conditions in the approach channel are one of the prerequisites to ensure the ships navigating safely. Resulting from the discharging from the spi11ways, there exist obvious wave and high velocity areas on the navigation way, resulting in difficulty in navigating safely and being navigable only for less than 20 000 m3 / s. In the last years, the flow conditions have been observed to study the possibility of navigation for higher discharges. By analysis, it has been considered that the navigable flow can be increased up to 23 000 m3 / s under the current conditions.