The Study of Ecological Environment Fragility Based on Remote Sensing and GIS
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RESEARCH ARTICLE
The Study of Ecological Environment Fragility Based on Remote Sensing and GIS Yang Gao1• Hongmei Zhang2 Received: 9 August 2016 / Accepted: 8 February 2018 Ó Indian Society of Remote Sensing 2018
Abstract The Fuzhou district in China is a rapidly changing area with a high population growth and intense land use changes. To analyze the ecological fragility and its causes in the Fuzhou district in China, the ecological fragility was divided into six severity classes based on data from field surveys. The six classes are no fragility, tiny, light, medium, awful and extreme fragility. Using remote sensing and GIS technology, the ecological fragility was assessed spatially explicit and comprehensive, using a pixel size of 30 9 30 m2. The results show that four areas in Fuzhou District are the most fragile, i.e., Pingtan, Minqing County, Changle City and Fuzhou City. The key challenge to improve or retain ecological fragility for these areas is to optimize the land cover present and coordinate the land use within the region. Keywords Fragility ecological environment AHP method RS and GIS
Introduction The fragile ecological environment is that the ecological environment degeneration has surpassed the background level under existing social economy and technology. The fragile ecological environment is with the nature, the society, the economy closed to relate, and it is also the result of the humanity activity and the historical development process. Fuzhou district’s main ecological threats are soil erosion, river flooding, coastal droughts and the urban tropical island effect. Many researches of Song et al. (2015) and Zhang et al. (2015) take fragile ecological environment definition, characteristic, appraisal system and fragility assessment method as well as actual regional application as main research content, which has brought a new ponder on the ecological environment. Given the results (Said 2013; Yao et al. 2016) of previous studies by the method of remote sensing (RS) and GIS, the study could rapidly extract each kind of index & Yang Gao [email protected] 1
Environment and Surveying Engineering College, Suzhou University, Suzhou 234000, China
2
School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
which reflects the fragile ecological environment. The weight of all kinds of indices was obtained to complete the study by the method of AHP. The appraisal unit is 30 m pixel size which is the resolution of remote sensing image, which is better to appraise the difference of the fragile ecological environment in the administrative area. In addition, our method has the advantage that it can be applied rapidly, and spatially explicit and comprehensive by using RS and GIS data and tools. The results of this paper also provide a meaningful for administrative stakeholders and managers to improve the region’s fragile ecological state. The appraisal index choice of the fragility followed the principles of leading, non-correlation, easy accessibility and represent
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