庄浪河流域生态保护重要性评价

Evaluation of the importance of ecological protection in the Zhuanglang River Basin

【目的】识别庄浪河流域生态保护重要性的等级及其空间分布,为实现国土空间规划、生态保护和高质量发展提供依据。【方法】采用简化模型法与NPP定量指标法,完成流域生态系统综合服务功能重要性和生态环境综合敏感性评价,形成不同重要性等级分区。【结果】庄浪河流域生态保护极重要区占总面积的52.56%,集中分布在流域上游生态极重要区和流域下游生态极敏感区,区内土地利用类型以草地为主;生态系统综合服务功能以生物多样性和水土保持为主导;生态敏感性类型以极敏感为主,土地沙化是主要的生态问题。【结论】庄浪河流域的生态敏感性极高,生态综合服务功能极重要,土地利用类型与生态重要性、生态敏感性的空间分布基本一致;国土空间优化的主要方向为耕地、建设用地从生态保护极重要区有序退出;生态修复的重点在于避免土地利用引起的土地沙化和提高水源涵养能力。

【Objective】 This study aimed to determine the level of ecological protection importance in the Zhuanglang River Basin and its spatial distribution,laying a foundation for territorial spatial planning,ecological protection and high-quality development.【Method】 The evaluation of the ecosystem's comprehensive service function and the ecological environment's comprehensive sensitivity in the watershed was conducted using the simplified model method and NPP quantitative index method,resulting in different levels of importance.【Result】 The ecologically important areas in the Zhuanglang River Basin accounted for 52.56% of the total area,primarily concentrated in the upper reaches and lower reaches,which were ecologically important and sensitive areas,respectively.The predominant land use type in these areas was grassland.Biodiversity and soil and water conservation dominated the integrated ecosystem services,while ecological sensitivity was mainly categorized as extremely sensitive,with land desertification being the primary ecological problem.【Conclusion】 In conclusion,the Zhuanglang River Basin exhibited extremely high ecological sensitivity and an important comprehensive ecological service function.The spatial distribution of land use types aligns with ecological importance and sensitivity.The spatial distribution of land use type was basically consistent with ecological importance and ecological sensitivity.Land space optimization should focus on the orderly withdrawal of cultivated and construction land from areas with crucial ecological protection.Ecological restoration efforts should prioritize preventing land desertification resulting from land use and enhancing water conservation capacity.