黄河潼关河段1996～2002年射流清淤效果分析

Analysis on effect of jet dredging at Tongguan reach of Yellow river during 1996～2002

概述了潼关河段1996～2002年射流清淤的基本情况,重点分析了清淤效果。实践证明,潼关河段射流清淤每条船平均每小时冲起泥沙数量约400m3;清淤对河道形态有明显的调整作用,使散乱的河势变得较为归顺,水流相对集中,从而提高了大河的挟沙能力;减少了潼关至古夺河段的淤积量;增加了汛期潼关高程的下降值。因此,在当前不利的水沙条件下,射流清淤对潼关高程迅速上升起到明显的抑制作用。

The general situation of jet dredging at Tongguan reach during 1996~2002 is summarized in this paper, the effect of jet dredging is analyzed. Amounts of clearing sediment is about 400 m^3 per hour for every jetting-ships, clearing sediment makes the form of the main river channel regulated, and enhances ability of water flow loading sediment, decreases deposition from Tongguan to Guduo reach,and increases sroping value of Tongguan elevation in flood season. These have proved that jet dredging obviously restrained the rising of Tongguan elevation in unfavorable incoming water and sediment.