期刊论文

Spatio-temporal variation of land ecological security and its influencing factors in Lijiang river basin

中文

中南林业科技大学学报

1673-923X

2021

41

11

136-151

10.14067/j.cnki.1673-923x.2021.11.016

湖南省重点研发计划项目（2020NK2022）；

本校为第一机构

【目的】漓江流域属于典型喀斯特地区,通过探讨城市建设加速、旅游开发加强等人类活动对漓江流域生态环境的压力,对漓江流域生态安全状态进行评价分析,具有重要现实意义。【方法】以多源遥感影像为数据源,结合3S技术,对漓江流域2000-2019年的土地利用/覆被变化进行了系统研究;采用基于熵权的改进的TOPSIS法结合DPSIR概念模型对漓江流域土地生态安全状态进行了评价。【结果】1)漓江流域土地利用/覆被变化显著;研究期内耕地减少205.44 km~2,林地先增后减,波动增加41.49 km~2,建设用地增加237.57 km~2,流域内草地、水域、未利用地面积也一直在减少,分别减少42.92、6.96、23.74 km~2,其中耕地和建设...

【Objective】The Lijiang river basin is a typical karst area,and its ecological environment is fragile.With the development of economy and the increase of tourism activities,the change of land use/cover is obvious,and the ecological environment is seriously threatened.In order to explore the pressure of human activities on the ecological environment of the Lijiang river basin,it is of great practical significance to evaluate and analyze the ecological security of the Lijiang river basin.【Method】The land use/cover change,ecosystem service func...