Research on Key Technical Indexes of Coastal Reclamation Planning and Design

Zhang Shixia,Cao Guangtian,Zhan Zhenyu

doi:10.1051/e3sconf/202128302002

Abstract

Large-scale coastal reclamation has become a significant land use issue worldwide for urban construction and economic development. The reclamation of coastal wetlands brings substantial economic benefits, however, the structure and function of coastal ecosystem are affected by drivers of human-caused landscape change. This research takes Hangzhou Bay and Zhoushan Islands as the case study to investigate the correlation between the coastal geomorphic complexity and the tidal range reduction rate, and to explore the control technical indexes of the design in reclamation area by a multidisciplinary approach that integrates the basic theories and quantitative methods of fractal geometry with the hydrodynamic mechanism of ocean dynamics. The results show that the coastal tidal range reduction rate is closely related to the coastline fractal dimension and patch shape index (D, S), and reveals the influence of the complexity of the coastal landscape on the tidal energy loss. In addition, based on model predictions, it can be found that the large-scale reclamation in Zhoushan will cause a serious decline in the complexity of the coastal landscape and the reduction of tidal energy, which is extremely detrimental to coastal disaster prevention. In the end, the scientific design theory and quantitative control indexes of reclamation are put forward to provide theoretical basis and design reference for future coastal reclamation and disaster prevention.

Highlights

Due to the growing demand for the resources, coastal reclamation has become a global land use practice
The reclamation of coastal wetlands brings substantial economic benefits, it can lead to a series of adverse ecological impacts[2] due to the lack of scientific theoretical guidance and effective quantitative control measures
A fractal model between the length of the observation object and the observation scale will be established in the calculation, and the grid method will be used[12,13] to calculate the fractal dimension of the coastline

Summary

Introduction

Due to the growing demand for the resources, coastal reclamation has become a global land use practice. In the high-speed urban development, the reclamation of tidal flats in Zhoushan area mostly adopts 3 methods: harbor reclamation around a single island, reclamation connecting a small island and a big island, or connecting two adjacent small islands This leads to a substantial change in the landscape structure along the coast, especially the natural and complex morphological characteristics of the coastline. It can provide a theoretical basis and design reference for the rational use of tidal flat wetland resources and the maintenance of the sustainable development of coastal areas

Materials and Methods

Results & Discussion

Findings

Conclusions