洛阳市绿地景观格局分析及综合评判

绿地景观是城市生态系统的生态基础,人类赖以生存的基质与环境,城市生物多样性的载体,以洛阳市绿地景观为研究对象,利用遥感(RS)技术获取绿地的景观信息,建立了洛阳市绿地信息专题数据库,在景观生态学理论指导下,从绿地量、绿地规模、连接程度、空间布局等方面进行了洛阳市绿地景观格局分析,并通过主成分分析法,利用主成分与贡献率乘积的累积值,对不同区域绿地进行景观格局综合评价,将评价指标综合为景观格局、分离度和廊道密度3项指标,由于涧西区的人均绿地面积、绿化覆盖率、斑块平均面积、景观优势度、多样性指数均为最大;得出涧西区最优,西工区次之,老城区第三,洛龙区第四,瀍河区最差。该方法为绿地景观格局的综合评价提供了一定的参考,为洛阳市绿地系统的景观结构优化提供依据。

Landscape Pattern Analysis and Comprehensive Assessment of Greenbelt in LuoYang City

In city, Greenbelt landscape is the basis of ecological system, the matrix and environment for people to live on and the carrier of biological diversity .Luoyang is taken as investigative object in this paper, using remote sensing to obtain greenbelt landscape information, and the greenbelt information special database was built. Under the direction of landscape ecology, the greenbelt landscape pattern is analyzed from such aspects as greenbelt quantity,greenbelt size, joint degree and spatial structure, etc.Applying primary component analysis to the vegetation landscape ecological comprehensive assessment,the landscape ecological comprehensive assessment of greenbelt is carried on in different districts.The assessing indices are divided into three types that the first is landscape pattern index, the second is separation index and the third is corridor density index. Because the greenbelt area of per man, the green cover ratio, the mean patch area, the landscape dominance and the diversity is maximum in Jianxi district. The result showed that:Jianxi is best,the second is Xigong , the third is Laocheng ,the fourth is Luolong, and Chanhe is worst.The method offers useful reference for regional landscape pattern assessment and puts forward the basis for optimizing the landscape structure of Luoyang greenbelt system.