Evaluating the effect of plain afforestation project and future spatial suitability in Beijing
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aluating the effect of plain afforestation project and future spatial suitability in Beijing 1
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Tengyun HU , Xuecao LI , Peng GONG
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, Wencheng YU & Xiaochun HUANG
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Beijing Municipal Institute of City Planning and Design, Beijing 100045, China; Department of Geological and Atmospheric Sciences, Iowa State University, Ames 50011, USA; Ministry of Education Key Laboratory of Earth System Modeling, Department of Earth System Science, Tsinghua University, 2
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Beijing 100084, China; Tsinghua Urban Institute, Tsinghua University, Beijing 100084, China
Received December 6, 2019; revised May 6, 2020; accepted May 29, 2020; published online July 23, 2020
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Abstract Taking the “One Million-Mu (666 km )” Plain Afforestation (Phase I) Project (Phase I afforestation) in Beijing city as an example, we monitored the growth status of planted forest using long-term remote sensing images, and evaluated the impacts of afforestation on land use change and vegetation growth. We found there is a large space for improvement regarding the ecological benefits of the project. Moreover, we found forest patches with decreasing greenness after the afforestation were mainly converted from farmland with high greenness and low heterogeneity in terms of the normalized difference vegetation index (NDVI). This implies that those farmland patches are inappropriate for afforestation. According to the results from Phase I afforestation and the impact of urbanization on green space, we constructed a series of spatial variables and generated a 2 suitability map for the next “New Round of One Million-Mu (666 km ) Afforestation project” (Phase II afforestation). We then modeled the spatial distribution of Phase II afforestation based on the derived suitability map. This study is crucial for the scientific evaluation of afforestation projects for space planning (e.g., urban green space planning). The evaluation and modeling framework built in this study can be used to support the decision making and policy implementation of afforestation projects in China. Keywords Citation:
Urban land use, Afforestation, Forest growth, Suitability, Segmentation, Forest modeling
Hu T, Li X, Gong P, Yu W, Huang X. 2020. Evaluating the effect of plain afforestation project and future spatial suitability in Beijing. Science China Earth Sciences, 63, https://doi.org/10.1007/s11430-019-9636-0
1. Introduction In China, there are many new requirements and challenges for managing and planning of urban spaces under the national strategy for new-type urbanization. With the establishment of the Ministry of Natural Resources on March 17, 2018, wide attention has been paid to efficient monitoring of natural resources and developing space planning systems in a scientific manner (Chen et al., 2019; Fang et al., 2019). As a complement of living and production spaces, green space is a * Corresponding author (email: [email protected])
stable environmental system that consists of different greening infrastructures in cities with varying sizes, nature, and fun
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