The major factors of watercourse siltation under tide-blocking floodgates in the coastal regions in northern Jiangsu province are tide, wind, the curving degree of watercourses, rainfall, and inning.

• 苏北沿海挡潮闸闸下淤积的主要因素有:潮汐、盛行风、水道弯曲程度、上游河道断面、收益区降雨量和围垦。