西双版纳土地利用景观格局分析
Analysis on the landscape spatial patterns of land-use in Xishuangbanna,Southwest China
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摘要: 以西双版纳地区2014年的TM遥感影像为基础数据,利用遥感与GIS技术对该区土地利用现状进行分析,结合景观生态学理论,运用景观格局分析软件对西双版纳地区景观总体格局特征及空间分异规律进行了初步分析与探讨.结果表明:① 有林地为西双版纳地区最具优势的景观类型,占土地总面积的47.8%;其次为橡胶成林,占土地总面积的19.1%;旱地、茶园和橡胶幼林也是西双版纳州较为重要的景观类型;② 土地利用景观格局存在显著的空间分异特征.在西部地区(勐海县),海拔较高、地形起伏较大,景观的多样性和破碎化程度较高,而景观优势度及集聚度则相对较低;在中部和东部的景洪市和勐腊县,海拔相对较低,受橡胶林种植影响,景观的多样性和均匀度较低,而景观优势度及集聚度相对较高.Abstract: Based on the TM images of Xishuangbanna in 2014 and remote sensing and GIS techniques,this paper analyzed the current structure of land use in Xishuangbanna,then further investigated and discussed landscape patterns and their spacial characteristics of the study area using several landscape pattern indexes.There results were:① forest was the dominant land use type in Xishuangbanna,followed by mature-rubber plantation,which occupied about 50% and 19.1% of the total area,respectively;tea and young-rubber plantation were the sub-important land use types in this area;② landscape patterns in Xishuangbanna varied greatly in space,for Menghai county in the west,which is the highlands and mountainous region of Xishuangbanna,had the highest landscape diversity index and fragmentation,but relatively lower dominance index and concentration compared to other region;for Jinghong City and Mengla county with low altitude in the central and eastern,landscape diversity index and evenness degree were low,while the landscape dominance index and the concentration degree were relatively high,since the affection of rubber plantation.