打击土地破坏已成为全球优先事项,中国采取了一系列生态工程措施,特别是生态环境脆弱的农牧区。生态工程建设(EEC)的有效性,从对其质量的全面认可中,数量,和功能,基本上是未知的。为此,张北县,中国北方典型的农牧交错带,被选为我们的重点领域。在总结了时间表之后,欧共体在张北各个时期的目标和结果,线性光谱混合分析用于处理2000年和2010年的Landsat5TM图像,以及2020年的Landsat8OLI图像。然后,从“数量-质量-功能”的角度建立了EEC的综合评价框架,2000-2020年,对张北市EEC的生态有效性进行了评价。结果表明,EEC在提高数量方面发挥了关键作用,质量和功能,尽管如此,在这些方面,仍然有许多地区显示出不同程度的退化。然后,通过扩展三维立方体作为EEC分区管理的理论基础,我们根据数量之间的空间匹配关系合并了四个区域,EEC的质量和功能,即,生态保护区,生态改善区,生态恢复区和生态重塑区。数量之间的特定匹配关系需要更有针对性的生态措施,EEC的质量和功能。这项研究有望为评估EEC在具有类似恢复需求和支持区域管理的地区或国家的生态有效性提供经验案例。
Combatting land damage has become a global priority, and China has adopted a series of ecological engineering measures, especially in the agro-pastoral area with fragile ecological environment. The effectiveness of ecological engineering construction (EEC), from a comprehensive recognition encompassing its quality, quantity, and function, has remained largely unknown. To this end, Zhangbei County, a typical agro-pastoral ecotone of northern China, was chosen as our focal area. After summarizing the timelines, aims and results of the EEC during various periods in Zhangbei, the linear spectral mixture analysis was employed to process Landsat 5 TM images in 2000 and 2010, as well as Landsat 8 OLI images in 2020. Then, a comprehensive evaluation framework of EEC was established from the perspective of \"quantity-quality-function\", and the ecological effectiveness of EEC was evaluated from 2000 to 2020 in Zhangbei. Results revealed that EEC played a critical role in enhancing quantity, quality and function, in spite of that, there were still numerous regions showing varying degrees of degradation in terms of these aspects. Then, by extending the three-dimensional cube as the theoretical basis for the zoning management of EEC, we merged four zones according to the space matching relationship among quantity, quality and function of EEC, namely, Ecological conservation area, Ecological improvement area, Ecological restoration area and Ecological remodeling zone. More targeted ecological measures were required for specific matching relationship among quantity, quality and function of EEC. This study is expected to present an empirical case for assessing the ecological effectiveness of EEC in areas or countries with similar restoration demand and support regional management.