摘要
根据2000年spot影像资料,应用地理信息系统软件ARC/INFO进行解译,并参照地形图、土地利用图等图件得到研究区景观类型图。应用景观生态学的方法,对各流域的景观格局分别进行定量计算,并进行比较研究。研究表明,各流域优势景观各有不同,从锦阳川至锦绣川、锦云川,景观多样性程度降低,优势度升高,林地破碎化程度增强,从而导致水土流失程度加深,人文因素是导致景观格局空间差异的主导因素。
Based on the theory that landscape pattern may influence soil and water loss ,the study intends to discover the influence of landscape pattern on soil and water loss in Jinxiu valley,Jinyang valley and Jinyun valley in southern mountain region of Jinan city With spot image used as main data source,a classified map of landscape types is gained Then indices such as landscape propotion,landscape diversity,landscape dominance and landscape fragmentation are identified to analyse landscape pattern in the three valleys The results indicate that dominant landscapes are different in the three valleys,but dry lands,sparse forests and grasslands are the main landscape types for all Besides,low coverage rate of forest,shortage of diversity,high dominance and high fragmentaion are all disadvantages which induce to soil and water loss From Jinyang valley to Jinxiu valley and to Jinyun valley,the landscape diversity index decrease,landscape dominance index and landscape fragmentation increase As a result,soil and water loss aggravate The driving powers which lead to spatial difference of landscape pattern include natural factors and artificial factors,and the latter ones take the dominant action
出处
《山地学报》
CSCD
2003年第5期576-581,共6页
Mountain Research
关键词
景观格局
流域
水土流失
landscape pattern, valley,soil and water loss
