Policy-Driven Vegetation Restoration in Qinghai Province: Spatiotemporal Analysis and Policy Evaluation

Yuchen Zhang, Jianghong Zhu (), Lin Wang, Ke Wang and Jianjun Zhang ()
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Yuchen Zhang: School of Public Administration, China University of Geosciences, Wuhan 430070, China
Jianghong Zhu: School of Public Administration, China University of Geosciences, Wuhan 430070, China
Lin Wang: Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Ke Wang: School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Jianjun Zhang: School of Land Science and Technology, China University of Geosciences, Beijing 100083, China

Land, 2024, vol. 13, issue 7, 1-21

Abstract: 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.

Keywords: NDVI; spatiotemporal variations; vegetation restoration; ecological policy; Qinghai Province (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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