通化市高程梯度变化与土地利用景观格局分异研究

以通化市为例，应用30m分辨率的DEM，对高程梯度信息进行提取，结合通化地区的土地利用景观格局数据，应用Arc／Info软件和Fragstats3．3景观分析软件，选取不同的景观格局指数，定量分析通化地区的景观格局高程梯度上的分异规律。结果表明：林地是通化地区主要的景观类型，主要分布在海拔较高的区域；其他的景观分布在海拔相对较低的区域，景观格局的分布与高程和人类活动有着密切的关系：在海拔较低的区域，由于人类活动的影响，景观的类型丰富、结构复杂、景观破碎化程度高；海拔较高的区域，景观类型单一、结构简单、景观破碎化程度低。其中400nl～500m的高程梯度是各种景观的集中分布区域，景观格局复杂，是人类活动主要的分布区域。图3，表5，参12。

Analysis of Elevation Gradient Change and Land Use Landscape Heterogeneity in Tonghua City

As a case study of Tonghua City, we use DEM with resolution of 30m to extract elevation gradient. Conbining with landscape data of Tonghua city, with several landscape index,we carried out a quantified analysis of the landscape heterogeneity in the elevation gradient of Tonghua city using Arc/Info and Fragstats 3.3 software. The results show that the forest is the main landscape type in Tonghua city, it exists in the region where the elevation is high; Other landscape types exist in the region where the elevation is low. The distribution of landscape has close relationship with elevation and human activities ： in the region where the elevation is low , with the influence of human active, types of landscape are rich, the structures are complex and highly fragmented ; in the region where the elevation is high, types of landscape are singleness, the structure is simple, and lowly fragmented. The elevation gradient of 400m - 500m is the region where the landscapes are concentrated, landscape pattern is complex and it is the main region of human activities .