Zoning methods and suggestions for integrated ecological environment units in “Three Lines One Permit”
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摘要:
生态环境管控单元是实施生态环境分区管控的重要基础，科学合理划定及更新生态环境管控单元是完善“三线一单”生态环境分区管控制度的关键技术难点。在梳理全国各省（区、市）“三线一单”生态环境管控单元划定方法的基础上，以H省全省及其A市、B市、C市3个城市为例，对比分析了要素叠加并集（叠加法）和拟合行政边界阈值（拟合法）2种生态环境管控单元划定方法的结果差异性；讨论了不同自然地理条件、生态环境功能特征下2种划定方法的适用性，建议优先采用叠加法划定生态环境管控单元，并提出了不同地形区域拟合法划定阈值标准的范围与建议。以期为优化“三线一单”生态环境管控单元划定技术方法、完善生态环境分区管控制度、提升生态环境精细化管理水平和治理能力提供技术支撑。
Abstract:The integrated ecological environment units are important basis for the implementation of the ecological environment zoning control. The scientific and reasonable delineation and updating of the integrated ecological environment units are the key technical difficulties in improving the ecological environment zoning control system of "Three Lines One Permit". On the basis of sorting out the overall application of the zoning methods for integrated ecological environmental units in all the provinces (autonomous regions and mulicipalities) of China, taking H Province and its three cities A, B, and C as examples, the differences in the results of two zoning methods of element merging method (merging method) and administrative boundary threshold fitting method (fitting method) of integrated ecological environment units were compared and analyzed, the applicability of two zoning methods were discussed under different geographical conditions and ecological environment function characteristics. It was suggested that the merging method should be preferred to delineate the integrated ecological environment units, and the scope and suggestions for the threshold standards in different terrain areas by fitting method were proposed, to provide technical support for optimizing the technical methods of delineating the integrated ecological environment units in "Three Lines One Permit", improving the zoning management and control system of ecological environment, and improving the fine management level and governance ability of ecological environment.
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图 1 2种生态环境管控单元划定方法比较分析示意
Figure 1. Schematic diagram of two zoning methods of the integrated ecological environment units
图 2 H省省级成果中2种方法的生态环境管控单元划定结果对比
Figure 2. Results of integrated ecological environment units based on two zoning methods in H province
图 3 H省3个城市2种方法的生态环境管控单元划定结果对比
Figure 3. Results of integrated ecological environment units based on two zoning methods for 3 cities in H province
图 4 叠加法划定生态环境管控单元技术流程建议
Figure 4. Suggestions on the technical process for using merging method to delineate integrated ecological environment units
表 1 拟合法划定生态环境管控单元的适用性及阈值建议
Table 1. Applicability and threshold standard suggestions for using fitting method to delineate ecological environment control units in different terrain areas
区域 案例
地区适用性 阈值标准 划定建议 优先保护
单元重点管控
单元生态保护区 A市 较适用 45%~50% 40%~50% 优先保护单元阈值建议按保守取值（低于45%），以强化生态保护空间的完整性 地形复杂区 B市 适用 40%~50% 50%~65% 重点管控单元阈值建议按乐观取值（不低于65%），避免过度
扩大管控范围平原
地区C市 不适用 不同阈值难以体现
管控单元分类
分级的差异性
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