Feasibility and ecological value assessment of roof greening in the central urban area of southern Jiangsu

WANG Xinjun, CAO Lei, WANG Yan, WANG Jikai,ZHAO Yanwen

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 153-157.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 153-157. DOI: 10.3969/j.issn.1000-2006.201611037

Feasibility and ecological value assessment of roof greening in the central urban area of southern Jiangsu

  • WANG Xinjun1,3, CAO Lei2, WANG Yan1, WANG Jikai1,ZHAO Yanwen3*
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Abstract

【Objective】A scientific and systematic assessment of the feasibility and ecological value of urban roof greening construction is the prerequisite for a safe and sustainable exploitation of the idle roof resources in cities. It also profits urban ecological environment and assists city planners and managers in their decision-making regarding green roof development.【Method】 This study selects the center area of Xinbei District, Changzhou City as a target and aims to build an index system for the feasibility and ecological value assessment of urban roof greening. Remote sensing image technology is employed to collect data for the index system, combined with raster image overlay and reclass methods in ArcMap software for construction feasibility evaluation. 【Result】These methods reveal that in the total roof area of approximately 150 500 m2, 72 600 m2 proves suitable for roof greening, among which 19 600 m2 is fit for intensive greening, 40 000 m2 for semi-intensive greening and 13 000 m2 for extensive greening. After feasibility assessment, market value method is then applied to analyze the ecological value of roof greening in the center of Xinbei District from four aspects, namely, air quality promotion, carbon fixation and oxygen release, energy conservation, and rainwater adjustment. The ecological value is found to be 16.87 Yuan( RMB)/(m2·a).【Conclusion】The study comprehensively analyze the feasibility and sustainability of roof greening construction in the study area, and help to improve the efficiency of the use of urban building roof.

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WANG Xinjun, CAO Lei, WANG Yan, WANG Jikai,ZHAO Yanwen. Feasibility and ecological value assessment of roof greening in the central urban area of southern Jiangsu[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(06): 153-157 https://doi.org/10.3969/j.issn.1000-2006.201611037

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