摘要
现有土地生态安全评估涉及大量的行政区社会经济数据,评价方法常常忽略单个指标对综合值的影响程度,本文构建了基于地质-水文-生物(GHB)的生态安全评价体系,提出基于物元分析的区域土地生态安全评价方法,以大安市为例进行土地生态安全水平定量评价。评价得出大安市87.45%的土地生态安全水平处在安全级,但整体生态安全水平仍有较大提升空间;单个指标分析表明,大安市土地生态建设重在推进重要水源管理、提高植被覆盖度、减少矿产开采量和减少地下水开采量等工作。研究结果表明,物元分析能够揭示单个评价指标的分异信息,对大安市生态安全的改善有一定指导意义。
Land ecological security is the core of human sustainable development.Due to the rapid growth of China's economy and the rapid advance of urbanization,the irrational use of land resources has produced a series of land ecological security problems,such as soil erosion,land salinization,land desertification and other issues.The relationship of each factor in the land ecological system is complex,but the qualitative problem of the existing evaluation method is more serious,because it cannot reflect the relationship between the index and the system.In view of that problem,matter-element model was introduced into regional land ecological security evaluation.The evaluation results show that 87.45% land of ecological security level of Da'an County is at the safety level,nevertheless,the overall ecological security level still has room for improvement.Therefore,in order to improve and enhance the level of land ecological security,and to promote the sustainable development of urban ecology,groundwater exploitation needs to be controlled and reduced,the level of coal mining needs to be reduced,vegetation coverage needs to be increased,and energy conservation awareness needs to be enhanced,and the highpolluting industries relocation or ecological management policies needs to be resolutely implemented.In the face of unchangeable natural conditions and unavoidable meteorological disasters,the relevant departments of Da'an County should take appropriate measures to control the adverse effects,caused by disasters and reduce the damage caused by artificial disturbance to the ecological environment.Matter element analysis can reveal the information of individual evaluation index.Evaluation method of land ecological security based on the matter-element model was an objective and scientific comprehensive assessment method.This study could provide a reference for the sustainable development of regional land resources.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第S1期238-246,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
国土资源部公益性行业科研专项(201511010-06)
关键词
物元分析
土地
生态安全评价
指标体系
matter-element analysis
land
evaluation on ecological security
index system
