长江流域资源与环境 >> 2014, Vol. 23 >> Issue (10): 1391-.doi: 10.11870/cjlyzyyhj201410008

• 自然资源 • 上一篇    下一篇

苏北浅滩腰沙围填海控制线研究

刘佰琼,徐敏,俞亮亮   

  1. (1.南京师范大学地理科学学院,江苏 南京 210023;2.南京水利科学研究院,江苏 南京 210029)
  • 出版日期:2014-10-20

STUDY ON RESTRICTION LINE OF SEA RECLAMATION IN THE NORTHERN JIANGSU SHOAL

LIU Baiqiong1,XU min1,YU Liangliang2   

  1. (1. School of Geography Science, Nanjing Normal University, Nanjing 210023, China;
    2. Nanjing Hydraulic Research Institution, Nanjing 210003, China)
  • Online:2014-10-20

摘要:

围填海控制线是在工程可行的前提下,不显著改变区域海洋动力格局和岸滩演变趋势的最大围填外包络线,能够最大限度地协调围填海与海洋资源环境保护之间的关系。以苏北浅滩腰沙为例,在对围填海控制性因素进行筛选、识别与分析的基础上,根据各控制性因素的控制要求,设计了围填海控制性指标。应用潮流数值模拟和泥沙回淤预测技术,采用分层次筛选和迭代逼近的方法,构建围填海控制线迭代优选模型,分析不同围填海方案对海洋动力格局演变的影响,计算得到腰沙的围填海控制线为理论基面+28 m。提出的研究方法和迭代优选模型可为沿海省市围填海控制线的制定提供参考和方法借鉴,为制定围填海规模总量控制指标提供科学依据

Abstract:

The sea reclamation plays an important role in relieving contradiction between human and lands, increasing food security, expanding development space and promoting economic development in the coastal areas. It was necessary to research on the restriction line of sea reclamation, exploring the suitable sea reclamation scale and development intensity which would comply with the natural evolution tendency and accommodate to the bearing capacity of marine resources and environment. Through the sustainable utilization of the marine spatial resources expected to be realized, 〖JP2〗the restriction line of sea reclamation was the biggest outer enveloping curve on the basis of feasible engineering project, which would not change the ocean dynamic pattern and natural evolution tendency. On the foundation of the characteristics analysis of open coast and the impact on resources and environment of sea reclamation, the controlling factors had been identified from marine environment factors, including important environment sensitive objectives, marine resources and marine hydrodynamic conditions. According to analysis of the interaction mechanism in different controlling factors, the sea reclamation controlling index could be designed and the method of determining the threshold of sea reclamation controlling index had been put forward. In order to analyze different reclamation scheme’s influence on marine geodynamic pattern evolution, the iterative optimization model of sea reclamation restriction line was constructed. The iterative optimization algorithm was put forward by using hierarchical filtering and iterative approximation method. Besides, the tidal current numerical simulation and sediment siltation prediction technique were applied in the iterative optimization model. Taking Yaosha (peninsular shoal in the radial sand ridge of Jiangsu Province) as an example, the sea reclamation scale evaluation was carried out. Distinguishing the sea reclamation controlling factors by analyzing the natural resources and social and economic conditions, the iterative optimization model of sea reclamation restriction line had been constructed. And the Yaosha twodimension tidal current mathematical model and sediment empirical model were used to analyze different sea reclamation restriction line scheme’s influence on the tidal current field and accretionerosion environment in the adjacent sea area. Especial attention had to be paid to the impact on tide flow and flow field characteristics of tidal channel such as Xiaomiaohong, Sanshahong and Wangcanghong, et al. The calculation results showed that the reclamation restriction line was 2.8 m above the theoretical datum plane in Yaosha. The research method and iterative optimization model could not only provide methodology and reference for other coastal provinces, but also provide scientific basis for formulating the total amount control indicators of sea reclamation scale

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