Redai dili (Nov 2024)
Ecological Potential Evaluation and Restoration Strategy Selection of Artificial Coastal Zones: A Case Study of Shenzhen
Abstract
Restoring the natural form and ecological function of artificial coastal zones in coastal cities can effectively improve the ecological quality of these zones. Improving the natural shoreline retention rate through this effort is also an important step in Chinese coastal cities' implementation of Xi Jinping's idea of ecological civilization. With limited resources and funds for ecological restoration, and the dual requirements of urban development and ecological protection, this study primarily focuses on how to scientifically identify the areas for ecological restoration of urban artificial coastal zones, rationally arrange the restoration schedule, and formulate the restoration strategy . This study examines 34 sections of artificial coastal zones in Shenzhen City, integrates multiple data sources to conduct spatial superposition analysis, constructs an index system for evaluating the ecological potential of artificial coastal zones, and formulates a model framework for the selection of restoration strategies, which can inform the restoration of artificial coastal zones and the management of shorelines in other coastal cities in China. The study's findings are as follows: (1) The ecological potential of Shenzhen's artificial coastal zone is spatially heterogeneous, and four different restoration response strategies can be adopted in the order of potential from high to low: "control pressure, natural restoration"; "relief pressure, ecological restoration"; "control pressure, environmental enhancement"; and "relief pressure, environmental enhancement." These correspond to four types of control zoning: ecological restoration zone, ecological recovery zone, ecological control zone, and landscape coordination zone. (2) The six sections of Xiban Park have the greatest ecological potential of Shenzhen's artificial coastline, and the restoration strategy is intended to control the external pressure and guide its natural recovery. The corresponding coastlines of these six sections constitute the first batch of new natural shorelines to be managed, to reach the target of increasing the natural shoreline retention rate of Shenzhen to 40%. (3) Nan'ao Wangyu Jiao and the other five sections of Shenzhen's artificial coastline have the second-largest ecological potential, and the restoration strategy is to relieve external pressure and take appropriate restoration measures to enhance its ecological function. The corresponding coastlines of these five sections can be managed and maintained as reserve natural coastlines. (4) The remaining 23 sections of artificial shoreline have little ecological potential and can be used as urban landscape or general public shorelines in combination with their location, without restoration intervention actions. (5) Coastal zones with high ecological potential are usually located in inlets with weak hydrodynamics, and the seaward side of such coastal zones is prone to siltation. This is conducive to the formation of new habitats and can be used as a simple indicator of whether artificial coastal zones can be restored to their natural state and ecological functions relatively quickly.
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