浙江沿海海域泥沙变化及其对滩涂变化的影响

采用实测资料分析和数学模型等方法深入探讨浙江沿海泥沙量变化及其对滩涂的影响。分析表明浙江沿海滩涂塑造的泥沙来源包括长江口来沙和浙江沿海主要河流输沙量等，长江口来沙是其主要沙源，近20a来具有明显减少的趋势。长江口来沙、长江口三角洲和浙东海域大量的沉积泥沙对维持浙江滩涂的塑造与可持续性具有重要作用。长江来沙量的持续减少，将会影响浙江沿海滩涂自然淤涨速率和人工塑造的规模，但将有30余年的滞后效应。

The Variation of Coastal- sediment on the Coast Line in Zhejiang Province and its Impact on the Variation of Shoals

This article used the measurement data analysis and mathematical model to investigate the amount change of the coastal sediment and its impact on the tidal flats. The analysis showed that the source of the sediment which used to shape the shoals in Zhejiang province includes the Yangtze River Estuary sediment and the river sediment along the coast of Zhejiang province. The main source is the Yangtze River Estuary sediment. During the last 20 years it shows a obvious decreasing trend. The Yangtze River Estuary sediment and the large amounts of sediment in the mouth of the Yangtze River Delta and the eastern sea area play an important role in the shoals＇ shaping and sustainability in Zhejiang province. The continuous decreasing of the Yangtze River Estuary sediment will affect the coastal natural deposition rate and aaificial shaping scale in Zhejiang province, but there will be a lag effect of more than 30 years.