摘要
东江源区的生态状况直接影响其下游水质,威胁广东省及中国香港的用水安全。随着源区城镇化、工业化进程加快,人类活动对源区的生态环境扰动也日益引起人们关注。采用多因子评价方法,选择植被指数(NDVI)、坡度、年均温、年均降水、人口密度五项指标,通过层次分析法确定权重,建立评价体系,对东江源区的生态敏感性影响因素进行分析。结果表明,东江源区生态敏感性与人类活动和自然条件密切相关,在空间上呈“高-低-高”分布,生态敏感性在2010年最低,2015年最高,2020年有所回落。重度生态脆弱区占比很小,整体生态敏感性中等。
The ecological status of the Dongjiang source area directly affects the water quality of its downstream water,threatening the water security of Guangdong province and Hong Kong region.With the acceleration of urbanization and industrialization in source areas,the disturbance of the ecological environment of human activities on source areas has also attracted increasing attention.In this pa-per,the multi-factor evaluation method was adopted,and five indicators were selected:vegetation index(NDVI),slope,average annual temperature,average annual precipitation and population density,and the weights were determined by analytic hierarchy,and an evaluation system was estab-lished to analyze the influencing factors of ecological sensitivity in the Dongjiang source area.The results showed that the ecological sensitivity of the Dongjiang source area was closely related to hu-man activities and natural conditions,and showed a“high-low-high”distribution in space,with the ecological sensitivity being the lowest in 2010,the highest in 2015,and declining in 2020.The pro-portion of severely ecologically fragile areas is very small,and the overall ecological sensitivity is medium.
作者
周静茜
蔡英明
ZHOU Jingqian;CAI Yingming(School of Civil and Surveying Engineering,Jiangxi University of Science and Technology,341000,Ganzhou,Jiangxi,PRC)
出处
《江西科学》
2023年第5期908-913,共6页
Jiangxi Science
基金
江西省大学生创新创业项目(S202210407022)。
关键词
东江源
GIS
生态敏感性
生态脆弱性
Dongjiang source area
GIS
ecological sensitivity
ecological fragility
