小尺度海域空间评价单元划分技术研究——以福建省东山湾为例

科学合理的海域空间评价单元划分是各类海洋空间监测、评价、规划和管理的基础工作，对于保护海洋生态环境，实现海洋资源的可持续开发利用具有重大现实意义。然而，海洋的流动性、开放性、边界模糊性等特征，导致海洋空间评价单元划分较陆地而言更为复杂、困难。以福建省东山湾为例，提出一种适用于小尺度海域的空间评价单元划分技术方案，通过从化学属性、物理属性、生物学属性三个方面构建海域空间生态属性划分指标体系，进行空间分类评价，运用插值、叠加分析等GIS技术将东山湾划分为67个基本空间评价单元。研究结果不仅能为进一步划定东山湾海洋空间规划提供技术支持，同时为其他小尺度海域生态监测、评价、规划和管理提供科学参考。

The spatial division approach of evaluation units in fine-scale sea area: a case study of Dongshan Bay, Fujian Province

For the sustainable development and utilization of marine resources, and protection of marine ecological environment, coastal countries have successively implemented marine spatial planning (MSP). MSP is considered as an important marine management tool, which is an indispensable part of marine ecological civilization construction in China. Scientific and reasonable division of marine spatial units is the basic work of marine spatial monitoring, evaluation, planning and management, which is of great practical significance for the protection of marine ecological environment and the sustainable development of marine resources. However, the characteristics of the ocean, such as mobility, openness and boundary ambiguity, make the division of marine spatial units more complex and difficult than that of land. In this study, we collect a large number of data from environmental monitoring sites in Dongshan Bay. Based on the comprehensive and detailed data which can capture ecological environment status, we propose a technical scheme of spatial evaluation units division which is suitable for fine-scale sea areas. The scheme constructs the index system for the division of marine spatial evaluation units based on the physical, biological and chemical elements. Combined with GIS technology such as interpolation and spatial overlay analysis, Dongshan Bay is divided into 67 basic spatial evaluation units, which is a more accurate and scientific division of marine spatial units. On the basis of marine spatial units, local government can carry out the marine spatial monitoring, evaluation, planning and management. The marine environmental protection strategies and marine exploitation activities can be formulated for the sea areas with different environmental endowments by considering the local conditions. This division approach can not only provide technical support for the MSP of Dongshan Bay, but also can be a supplement of spatial units division approach for marine spatial monitoring, evaluation, planning and management. This division approach is suitable for fine-scale sea areas, but it is also applicable to large and medium-scale sea areas where complete and detailed environmental monitoring data can be obtained. The technical scheme of marine spatial units division proposed in this study has a wide application prospect.