ABSTRACT

Based on satellite remote sensing information and the extrapolation of tide level in the West Tai-Yang-Sha, changes in the plane location and exposed area of the West Tai-Yang-Sha over time, especially in the periods when the passing of typhoon 9711 and typhoon Maysa, are provided quantitatively. Multi-year unchanged area in the West Tai-Yang-Sha was obtained as the proposed construction site of artificial island. The systematic study of the stability of the sandbar has revealed the characteristics and trends of the evolution of the beach trough in the waters of the radiation sandbar, demonstrated the stability of the West Tai-Yang-Sha, and arrived at the macroscopic conclusion that a large-scale seaport can be constructed in the waters of the radiation sandbar.

INTRODUCTION

Radiation sandbar is in the transition area between warm temperate zone and subtropical zone, with mild climate and abundant rainfall, and the beach wetlands along the coast and intertidal zone are characterized by both land and marine environment. The silty sandy mudflats hold water, salt and other nutrients, and are rich in shellfish and grassy beaches, which are more conducive to the survival of a wide variety of organisms than hard rocky shores. For many migratory birds, this is their ideal home.

In addition, the sandbar group has a unique topography, they are distributed in the shallow sea, as if they were natural seawalls, which can buffer the impact of large waves and storm surges, faithfully guarding the superior ecological environment, and is also conducive to the development of the vast tidal flats and the silt growth in the center of the sandbar. During the long years of growth of the sandbar cluster, the sandbars continue to merge into the shore and become land, becoming a large area of new land, creating new homes for migratory birds and other plants and animals. Radiation sandbars are highly valuable and unique in terms of biodiversity and as habitats for rare or endangered plants and animals.

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