长江流域资源与环境 >> 2012, Vol. 21 >> Issue (Z2): 85-.

• 生态环境 • 上一篇    下一篇

景观格局变化表征及驱动力相关性的定量化研究——以江苏省为例

沈 竞| 王 |浩   

  1. (1.南京林业大学理学院|江苏 南京 210037; 2.南京林业大学风景园林学院|江苏 南京 210037)
  • 出版日期:2012-12-19

INDEX OF LANDSCAPES CHANGE AND THEIR MAIN DRIVING FACTORS A CASE STUDY IN JIANGSU PROVINCE,YANGTZE,CHINA

SHEN Jing 1,2, WANG Hao 2   

  1. (1.Science Department of Nanjing Forestry University, Nanjing 210037, China|2.College of Landscape Architecture,Nanjing Forestry University, Nanjing 210037 China
  • Online:2012-12-19

摘要:

导致景观格局变化的驱动因子数量众多,目前采用的多种类型的景观格局指数刻画景观的结构特征,如何利用数量方法揭示他们之间的内在联系是对景观格局的研究的重要问题。针对如何有效进行景观格局指数和驱动因子的删减的科学问题,在定性分析和统计数据的基础上,利用ARCGIS分析得到江苏省栅格格式的景观生态类型图,并用FRAGSTATS3.3中计算得到景观指数进行分析,借助粗糙集属性约减的数据处理方法,将决策因子与属性因子与景观驱动因子和景观综合指数对应起来,并从景观格局指数中选出强指数,构成景观综合指数,作为决策因子,对所选择的19个属性因子作为属性因子,进行删减,结果证明方法有效,删减得到的4个条件属性,将它们与景观综合指数分别做相关性分析,得到江苏省的主要驱动因子与区域景观格局之间关系的定量表达,反映区域景观格局为城市化特征,对区域景观格局规划有指导意义

Abstract:

There are a lot of driving factors for landscape pattern change.Various landscape metrics have been used in the past to provide a quantitative description of landscape structure.The data of landscape pattern indices stores large number of data,how to extract useful knowledge from these data is the key to landscape pattern research.This paper introduces new method into landscape pattern research.How it can be effective selection is very important to understand driving mechanism of landscape pattern change.The rough set is an effective data processing method,we use this approach based on qualitative analysis and statistical data.The main objectives of the paper is correlation between landscape pattern and driving factors.we present a kind of reduction method that is based on attribute importance selection.Firstly,we drew the type raster format map of Jiangsu Province landscape ecology using ARCGIS analysis and calculated many landscape indices in FRAGSTATS 33.We investigated the utility of landscape pattern indices for judging the regional landscape features.Secondly,we analyzed the strong index which we choose,The number of landscape patches (NP),the average area mean (AMN),patch shape index (LSI) and aggregation index (AI),were made to the Landscape Composite Index(LCI),a decisionmaking factor in rough set model.Thirdly,we chose 19 property factors as attribute factor for reduction,including natural factors and human factors.The main reason that natural factors were selected was according to the Statistical Yearbook.There were factors including agricultural output value (a13),the forestry (a15),Animal Husbandry (a16),fisheries (a17),and so on.We gave expression nature by factors.Human factors were the main part of attribute factors.These included primary,secondary,tertiary industries,traffic factor and population,etc.Based on model in the paper,we drew the conclusion as follows.Four main factors of 19 factors were retained key attributes.These were the total population,the secondary industry output,value of the cargo and the area of cultivated land.It showed that the method was effective.So we made correlation analysis between decisionmaking factors and LCI of Jiangsu Province.The proportion of the population share of urban population and regional ILI index was high as -095,which reflected the population in particular the urban population was the main driving factor of landscape pattern change.By correlation analysis of the road and the ILI,correlation coefficient value of -0.874 6,water transport and ILI correlation coefficient was -0.604 3,it could be concluded that land transport factor was the main driving factor of landscape pattern changed.We correlated ILI index with the national infrastructure,and  found the relevant value of -0.75,suggesting a strong correlation.In a word,the landscape pattern of regional characteristics was urbanization

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