1.工程概况黄河北杜河段河床自1964-1995年,由于泥沙连年淤积,河床抬高3.53m,河势主流线向右岸摆动近500m,截止1998年北杜附近滩岸累计最大坍塌宽度582m。原来较为平顺的滩岸已形成局部较深的坐弯挑流,并引起以下河段合适的进一步恶化,决定修建北杜控导护滩工程。 1. Engineering Overview The bed of the Beidu section of the Yellow River has been subjected to sedimentation for successive years since 1964-1995 with an elevation of 3.53m. The main stream line of the river has a swing to the right bank of nearly 500m. As of 1998, the cumulative maximum collapse width at the beach bank near Beidu was 582m. The originally smoother beach bank has formed a deeper part of the sitting bend and led to the following further deterioration of the appropriate river sections, decided to build North Du control ledge project.