公路网规划对景观格局影响的分析方法研究

公路作为景观生态学中的廊道，对生态系统或景观具有线性切割作用，并导致景观格局的破碎化．公路网作为廊道网络，对于景观格局的破碎化影响巨大．文中提出了基于GIS的公路网景观格局影响分析的叠图法，该方法包括绘制景观图件、景观分类、计算景观指数以及进行景观影响分析等4个步骤．将叠图法应用到江西省公路网规划环境影响评价中，其分析结果为当地编制生态环境保护规划提供了参考．

Analysis Method of Impact of Road Network Plan to Landscape Pattern

Fragmentation refers to the break-up of natural areas into smaller and more isolated units. Our understanding of the insidiousness of habitat fragmentation has increased dramatically in the few years and this effect is currently considered as one of the greatest threats to biodiversity world-wide. Those effects can potentially lead to a decline in the ecosystem biodiversity as well as in its stability and ability to recover from disturbances. Road is acknowledged to be a major cause of fragmentation. Landscape fragmentation caused by the main transport infrastructure network is seen more and more. A method based on GIS is put forward in this paper, including 4 steps, namely drawing landscape picture, classing landscape, calculating landscape index and analyzing the impact to the road network. This method is applied to the strategic environmental assessment for road network plan of Jiangxi province.