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无居民海岛保护和利用规划是海岛使用管理体系的重要组成部分之一,是承接海岛管理者和海岛使用者之间的重要载体。如何科学的、合理的确定开发空间是规划的核心问题,也是规划的难点。以大山屿、顶屿海岛保护和利用规划为实例,探索对生态敏感度高的海岛在保证生态安全的前提下确定开发空间的方法。根据海岛生态现状,确定人为干扰度为主要评估因子,按照不同空间利用类型对人为干扰度进行赋值,并对海岛人为干扰现状进行评估。计算结果显示,海岛人为干扰现状处于轻微等级且量级很低,与实际情况吻合,验证了引入模型的适应性。最后,利用模型中人为干扰度轻微的阀值推算海岛可开发空间,并讨论了此方法的适用范围。
Non-resident island protection and utilization planning is one of the important components of the island’s use-management system and an important vehicle for undertaking island managers and island users. How to determine the development space rationally and reasonably is the core issue of the planning and also the difficult point of the planning. Taking the planning of the protection and utilization of Dashan Island and Dingyu Island as an example, the paper explores the ways to determine the development space under the precondition of ensuring ecological security for islands with high ecological sensitivity. According to the ecological status quo of the island, determine the man-made interference as the main evaluation factor, assign the man-made interference degree according to the different types of space utilization, and assess the man-made disturbances on the island. The calculation results show that the status quo of man-made disturbances on the island is at a slight level and the magnitude is very low, which is consistent with the actual situation, which verifies the adaptability of the introduced model. Finally, the exploitable space of the island is estimated by using the threshold of slight human interference in the model and the applicable scope of this method is discussed.