青海省政策驱动的植被恢复:时空分析与政策评估

Land Pub Date : 2024-07-13 DOI:10.3390/land13071052
Yuchen Zhang, Jianghong Zhu, Lin Wang, Ke Wang, Jianjun Zhang
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引用次数: 0

摘要

中国政府在青海省实施了多项旨在保护和恢复自然生态系统的生态政策。然而,在全球气候变化的背景下,这些政策对生态改善的确切影响仍然模糊不清。因此,迫切需要对这些政策在区域范围内的效果进行综合评估,并分析政策实施阶段的变化,以优化区域生态政策的战略方向。本研究利用数理统计和空间分析方法,分析了青海省 2000-2023 年归一化差异植被指数(NDVI)的时空特征。此外,通过系统梳理该地区目前或之前实施的十项主要生态政策,合理划分政策研究分区,通过横向和纵向评价,探讨植被恢复对这些政策的响应。这项研究确定了政策实施的不同阶段--绿化、稳定和自然恢复,并将这些阶段与政策影响的效果联系起来。我们的研究结果表明,在过去二十年中,青海省的植被覆盖率有了明显改善,所有生态政策都对环境产生了积极影响。本研究的主要贡献在于在区域尺度上全面评估了多种生态政策对植被恢复的影响,为后续生态政策的制定和调整提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Policy-Driven Vegetation Restoration in Qinghai Province: Spatiotemporal Analysis and Policy Evaluation
The Chinese government has implemented numerous ecological policies in Qinghai Province aimed at protecting and restoring the natural ecosystem. Yet, amid global climate change, the precise effects of these policies on ecological improvement remain ambiguous. There is an urgent need for a comprehensive evaluation of the effects of these policies at a regional scale and an analysis of the changes in policy implementation stages to optimize the strategic direction of regional ecological policies. In this study, using mathematical statistics and spatial analysis, we analysed the spatial and temporal characteristics of the Normalized Difference Vegetation Index (NDVI) in Qinghai Province from 2000 to 2023. Further, by systematically reviewing ten major ecological policies currently or previously implemented in the region, we explored the response of vegetation restoration to these policies through both horizontal and vertical evaluations by reasonably delineating the policy study sub-zones. The study identified distinct stages of policy implementation—regreening, stabilizing, and natural recovery—and correlated these stages with the efficacy of policy impacts. Our findings indicate significant vegetation coverage improvements across Qinghai Province over the past two decades, with all ecological policies positively influencing the environment. The main contribution of this study is that it comprehensively evaluates the impact of multiple ecological policies on vegetation restoration at the regional scale, providing a reference for the formulation and adjustment of subsequent ecological policies.
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