惠来县景观格局与动态变化分析

Analysis of Landscape Patterns and Dynamics in Huilai County

在GIS技术和卫星遥感资料的支持下,利用景观格局分析软件FRAGSTATS 3.3分析了揭阳市惠来县1994—2001年的土地景观格局的动态变化,并分别在类型水平上和景观水平上选择了部分景观指数。计算结果表明,破碎度趋向加深,景观结构和斑块形状复杂性增加(尤以林地和其它用地严重);景观稳定性增加,优势度减少;景观多样性有所提高,受人类干扰程度加深,说明惠来县城市化速度快,处于城市发展的初期;各景观要素又有不同的景观动态特征。

Based on GIS and RS image,and with the help of FRAGSTATS 3.3,this paper studied the landscape change from 1994 to 2001 in Huilav Section of Jieyang.And selected some indices of the landscape pattern in class metries and land metries, for instance, class area, number of patches,percentage of landscape,patch density,total area,edge density,area weight mean shape index,largest patch index, Shannon＇ s diversity index .It was calculated that： （1）The degree of fragmention became worse. There were increases in the configuration of landscape and the shape of patches especially the woodland and farmland;（2）The landscape stability increased but the dominance decreased; （3）Landseape diversity had a little increase, more and more disturbance from human speeded up urbanization of Huilai but made it be in initial stages; （4）But each hndscape type had the different landscape patterns and dynamics.