涪江干流绵阳段河岸带景观格局时空变化研究  

Study on Spatiotemporal Changes of Landscape Pattern in the Riparian Zone of the Mianyang Section of the Main Stream of the Fujiang River

作　　者：崔禹涛 董廷旭[1] 陈卓 李鹏宇 CUI Yutao;DONG Tingxu;CHEN Zhuo;LI Pengyu(School of Resource and Environmental Engineering,Mianyang Normal University,Mianyang 621006,China)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621006

出　　处：《河南科技》2025年第3期88-92,共5页Henan Science and Technology

基　　金：绵阳师范学院横向科技合作项目(HX2023024)。

摘　　要：【目的】研究涪江干流河岸带及缓冲区土地利用景观格局时空变化特征,对维持河流生态系统健康、改善流域生态环境质量具有重要作用。【方法】以涪江干流绵阳段为研究对象,采用2000—2020年中国土地利用覆盖产品数据,将河岸带缓冲区分成7个景观类型,从景观格局指数中面积/密度指数、形状指数两个维度进行研究。【结果】涪江干流河岸带缓冲区从面积/密度指数上分析,耕地、林地CA值在不断减少,城镇建设用地、农村居民点CA值增大。林地LPI的值由原来的7.3767%增长到10.1683%,逐渐成为优势景观类型。缓冲区的耕地、农村居民点PD值先减后增,其他景观斑块PD变化不大。从形状指数上分析,缓冲区耕地、林地、城镇建设用地的LSI的趋势是上升,SHAPE的波动不大,大多斑块的值是上升态势景观图斑趋向不规则,景观类型趋向于复杂。【结论】20年来,涪江干流河岸带景观格局总体趋势在往好的方向发展。[Purposes]Studying the spatiotemporal changes in land use landscape patterns in the riparian zone and buffer zone of the main stream of the Fujiang River plays an important role in maintaining the health of the river ecosystem and improving the ecological environment quality of the watershed.[Methods]Taking the Mianyang section of the main stream of the Fujiang River as the research object,using data on land use cover products in China from 2000 to 2020,the riparian buffer zone was divided into 7 landscape types,and the study was conducted from two dimensions:area/density index,shape index,and landscape pattern index.[Findings]In the past 20 years,the buffer zone of the main stream of the Fujiang River has seen a continuous decrease in the CA values of arable land and forest land,while the CA values of urban construction land and rural residential areas have increased.The LPI value of forest land has increased from 7.3767%to 10.1683%,gradually becoming a dominant landscape type.The PD values of cultivated land and rural residential areas in the buffer zone decreased first and then increased,while the PD values of other landscape patches did not change significantly.From the perspective of shape index analysis,the trend of LSI for cultivated land,forest land,and urban construction land in the buffer zone is on the rise,while the fluctuation of SHAPE is not significant.The values of most patches are on the rise,and the landscape pattern tends to be irregular,with complex landscape types.[Conclusions]Over the past 20 years,the landscape pattern of the riverbank zone in the main stream of the Fujiang River has shown an overall trend towards improvement.

关 键 词：河岸带 景观格局 景观指数 涪江流域 

分 类 号：P901[天文地球—自然地理学]