The Urban Land Ecosystem Health Evaluation in Chengdu City

Ting, Zhou; Qi, Yin

doi:10.5539/esr.v1n2p297

Cited by 2 publications

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“…In general, indicators are selected based on the principle of data acquisition, regionality, scientific, representative, objectivity, and early warning (Ting & Qi, 2012). The prerequisites for developing an indicator framework urban ecosystem health assessment are categorized into two aspects.…”

Section: Indicator Systemmentioning

confidence: 99%

An integrated approach for assessing the urban ecosystem health of megacities in China

Zeng

Deng

et al. 2016

Cities

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In 2014, China adjusted its "city categorization standard." The newly defined megalopolises and metropolises are under unprecedented pressure from various eco-environmental problems, making them suitable representatives for exploring the state of urban ecosystem health. In this study, we establish a two-layer indicator system to assess the urban ecosystem health and choose 33 indicators grouped into social, economic, transportation, facility, land, and management subsystems, with the aim of correlating human activities with the structure, vigor, resilience, and health of the urban ecosystem. We integrate subjective and objective methods to determine weights at different levels through the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), the analytic hierarchy process, and information entropy. In particular, we develop a spatial TOPSIS technique by introducing a Euclidean-distance-based weight to rank the health of the cities' ecosystem in terms of the spatial effects among these cities. The results reveal that megalopolises such as Beijing, Shanghai, and Guangzhou have superior social and economic subsystems, whereas other megacities have advantages in transportation, facility, land, and management subsystems. From 2005 to 2010, the gaps among these cities in terms of urban ecosystem health significantly reduced regardless of the weight determination method. Not all indicators involved can help realize a better urban ecosystem. Nevertheless, they provide a reference point for making specific regulations to control human activity and improve eco-environmental management.

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Section: Indicator Systemmentioning

confidence: 99%

An integrated approach for assessing the urban ecosystem health of megacities in China

Zeng

Deng

et al. 2016

Cities

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Ecosystem Health Assessment of Mining Cities Based On Landscape Pattern

Liu

Lin

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Ecosystem health assessment (EHA) is one of the most important aspects in ecosystem management. Nowadays, ecological environment of mining cities is facing various problems. In this study, through ecosystem health theory and remote sensing images in 2005, 2009 and 2013, landscape pattern analysis and Vigor-Organization-Resilience (VOR) model were applied to set up an evaluation index system of ecosystem health of mining city to assess the healthy level of ecosystem in Panji District Huainan city. Results showed a temporal stable but high spatial heterogeneity landscape pattern during [2005][2006][2007][2008][2009][2010][2011][2012][2013]. According to the regional ecosystem health index, it experienced a rapid decline after a slight increase, and finally it maintained at an ordinary level. Among these areas, a significant distinction was presented in different towns. It indicates that the ecosystem health of Tianjijiedao town, the regional administrative centre, descended rapidly during the study period, and turned into the worst level in the study area. While the Hetuan Town, located in the northwestern suburb area of Panji District, stayed on a relatively better level than other towns. The impacts of coal mining collapse area, land reclamation on the landscape pattern and ecosystem health status of mining cities were also discussed. As a result of underground coal mining, land subsidence has become an inevitable problem in the study area. In addition, the coal mining subsidence area has brought about the destruction of the farmland, construction land and water bodies, which causing the change of the regional landscape pattern and making the evaluation of ecosystem health in mining area more difficult. Therefore, this study provided an ecosystem health approach for relevant departments to make scientific decisions.

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The Urban Land Ecosystem Health Evaluation in Chengdu City

Cited by 2 publications

References 0 publications

An integrated approach for assessing the urban ecosystem health of megacities in China

An integrated approach for assessing the urban ecosystem health of megacities in China

Ecosystem Health Assessment of Mining Cities Based On Landscape Pattern

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