苏北沿海挡潮闸下淤积的原因及其对策

沿海挡潮闸下淤积的主要原因是河口建闸后上游径流量减少、落潮历时延长、流速减弱、潮流量变小、潮波变形、潮汐水道变化和围垦不当等，闸下淤积影响了工程效益的充分发挥。减淤措施有水力冲淤、机械清淤，防淤措施有工程措施和植物措施。应依据河口淤积特征，全面规划，综合治理。

Siltation and Its Control in Downstream Tidal Gates in North of Jiangsu Province

After the construction of tidal gates on estuaries, siltation usually occurs in downstream tide gates, which seriously affects the gate operation and management Such siltation is often caused by many factors, such as the decreasing in runoff or tidal flow, extension of falling tide period, variations of tide waves and waterways, and inappropriate tideland cultivation The siltation should be harnessed comprehensively through desilting and control measures, involving water flushing, mechanical desilting, engineering measures, and vegetation measures