县域尺度不同地貌类型景观空间格局分析--以湖南省醴陵市为例

Analysis on Landscape Spatial Patterns of Different Topography on County Scale——A Case Study of Liling City,Hu'nan Province

地貌是影响景观空间格局的自然要素之一,本研究应用GIS软件,以湖南省醴陵市为例,分析了县域尺度不同地貌类型下景观格局的空间特征。结果表明:(1)地貌类型深刻影响景观格局的空间分布,同一景观类型在不同地貌区中的空间格局存在差异,总体表现为林地和水田占主导地位的景观格局。(2)随着地势的升高,林地景观优势愈加明显,其他景观类型的分布比例逐渐减少,景观多样性降低。(3)平原、低山区景观的空间异质化程度较高,破碎程度深;在海拔较高的山区,土地利用景观类型相对简单、优势度高,生态系统稳定。

Topography is one of the most important natural factors influencing the landscape spatial pattern. To analyze the relationship between topography types and landscape spatial pattern, a case study was carried out in Liling city, Hu＇nan province, which was focusing on the characteristics of landscape spatial pattern under the different topography types by using GIS technology and landscape ecological approaches. It was found. （1）The landscape spatial pattern was obviously influenced by the landform types in the study area, the same landscape element forms different landscape patterns in the dissimilar topography region. On the whole, the landscape pattern was dominated by forestland and irrigated land; （2）As the elevation increased, the advantage of forestland became more obvious, the percentage of other types of landscape gradually reduced, so the landscape diversity showed the decreasing tendency; （3）Plain and low-hill areas showed the high degree of spatial heterogeneity and fragmentation, while the landscape types were relatively simple and showed high value of the dominance index and stable ecosystem in the high mountain areas.