科研之友
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摘要
A two-dimensional early warning model was established by combining the land ecological security index with the ecological sustainability index under the framework of the risk matrix. And then, it was applied to Linxiang's early warning for land ecological security. The land ecological security index increased yearly. The stability and socio-economic supporting capacity of land ecosystem were enhanced continuously. The ecological sustainability index decreased continuously. The sustainability of land ecosystem's supporting capacity to socio-economic development was weakened gradually and it would inevitably become unsustainable without any measures. From 2005 to 2019, the warning degrees of land ecological security showed a fluctuated trend of "middle alert-light alert-middle alert-light alert". It is predicted that the "light alert" will continue from 2020 to 2025. The possibility of falling into "heavy alert" is highly unlikely. But there is still a risk of falling back into the "middle alert". The research suggests that land ecological security of Linxiang should be comprehensively improved by developing eco-friendly industries, increasing investment in environmental protection, expanding the secondary industry and construction land orderly, reducing consumption, and applying new technologies to improve productivity. It is significant that the two-dimensional early warning model can effectively avoid the problem of distortion in traditional models. The innovation of the two-dimensional early warning model is beneficial to improve the comprehensiveness, rationality, and forward-looking of the early warning results of land ecological security.
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