Abstract

Coastal reclamation can provide new space for agriculture, industry and urbanization, as well as new investment opportunities in coastal areas. As a result, both the length and proportion of artificial shoreline increased significantly. Meanwhile, the complexity of coastal morphology will be diminished by large-scale land reclamation. Although coastal geomorphic characteristics has a crucial impact on tidal energy loss and disaster prevention, little research has been conducted on the relationship between the tidal range reduction rate and coastal morphological complexity. This relationship is essential for predicting the impact of coastal complexity changes caused by accelerated land reclamation on tidal energy loss. Taking Hangzhou Bay and Zhoushan Islands as the research objects, combined with fractal geometry theory and quantitative assessment method of landscape complexity, the correlation between coastal geomorphological complexity and tidal distance reduction rate is analyzed, and A model based on the correlation of the tidal range reduction rate and geomorphological complexity is established. The model is applied to evaluate the effect of reclamation in Zhoushan Islands on the landscape complexity and dissipation of tidal energy. The results show that the tidal range reduction rate is reduced with the decrease of fractal dimension and shape index, indicating that the coastal geomorphologic complexity has an important effect on tidal energy loss. The efficient control indicators and scientific reclamation measures are discussed in this paper. This study provides new ideas for the analysis of the comprehensive impact of reclamation on coastal geomorphic characteristics and disaster prevention, and can provide guidance for the efficient utilization and protection of tidal flats.