摘要
为研究高原—山区—平原—滨海生态要素梯级流动特性的流域景观格局动态变化规律,以永定河流域1980—2020年7期Landsat遥感影像为主要数据源,综合运用景观面积动态分析、景观格局指数和数理统计等方法分析了近40年来永定河流域景观格局演变特征,并揭示其驱动因子。结果表明:1)1980—2020年流域土地利用类型以耕地、林地、草地为主,面积占比约90%;近40年,耕地、草地面积分别减少1376.38、463.42 m2,建设用地、林地面积增加,综合土地利用动态度在2015—2020年变化最大。2)在类型水平上,建设用地斑块破碎程度明显降低,其余用地类型变化不明显;景观水平上,香农多样性指数(SHDI)由1.29增至1.35,香农均匀度指数(SHEI)由0.67增至0.75,景观整体结构趋向复杂,异质性增加,团聚程度下降,景观破碎化加剧。3)流域景观格局变化受社会经济因素、自然因素和政策因素共同影响,其中社会经济发展为主要驱动力,经济发展和城乡人口结构变化是景观格局变化的主要驱动因子。
In order to study the dynamic change law of landscape pattern in the basin with the cascade flow characteristics of plateau-mountain-plain-coastal ecological elements,7 Landsat remote sensing images of Yongding River Basin from 1980 to 2020 were taken as the main data source,and the evolution characteristics of landscape pattern in Yongding River Basin in recent 40 years were analyzed by comprehensively using the methods of landscape area dynamic analysis,landscape pattern index and mathematical statistics,and its driving factors were revealed.The results showed that:1)From 1980 to 2020,Yongding River Basin was dominated by cultivated,forest and grass land,accounting for about 90%.The area of cultivated land and grassland had decreased by 1376.38 and463.42 km~2 respectively in the recent 40 years,the area of construction land and forest land had increased,and the dynamic degree of comprehensive land use had changed the most from 2015 to 2020.2)At the type level,the fragmentation degree of construction land patches had decreased significantly,while the changes of other land types were not obvious.At the landscape level,Shannon Diversity Index(SHDI)and Shannon Evenness Index(SHEI)had increased from 1.29 to 1.35 and 0.67 to 0.75,respectively;the overall landscape structure tended to be complex,the heterogeneity had increased,the degree of agglomeration had decreased,and the landscape fragmentation had been intensified.3)The change of watershed landscape pattern was affected by socio-economic factors,natural factors and policy factors,in which socio-economic development was the main driving force,and economic development and the change of urban and rural population structure were the main driving factors of landscape pattern change.
作者
曹丽慧
郎琪
雷坤
王殿武
杨坤
杨文浩
CAO Lihui;LANG Qi;LEI Kun;WANG Dianwu;YANG Kun;YANG Wenhao(College of resources and Environmental Sciences,Hebei Agricultural University;Chinese Research Academy of Environmental Sciences)
出处
《环境工程技术学报》
CAS
CSCD
北大核心
2023年第1期143-153,共11页
Journal of Environmental Engineering Technology
基金
国家水体污染控制与治理科技重大专项项目(2018ZX071-110-02)。
关键词
永定河流域
土地利用
景观格局
动态变化
驱动力
Yongding River Basin
land use
landscape pattern
dynamic change
driving factors
