摘要
干旱内陆河流域景观的空间结构受水土资源开发利用程度制约．通过划分景观分区和选取景观空间格局指标，分析研究了黑河流域中游地区景观的空间格局特征及其与人类活动及自然环境的关系，结果表明：１．土地资源开发程度高的区域，景观多样性、均匀性和破碎度值较大，景观优势度和分离度值则较小；２．研究区中部及南部耕地已成为主要景观类型．土地开发利用程度高，但中部绿洲区退化景观已具相当规模，且随沿山洪积扇区土地开发程度的提高，中下游生态环境退化趋势将加剧．
The spatial pattern of ecological landscape in an inland river basin is influenced heavily by the scale of water and land resources development. In this paper, the middle reaches of Heihe River basin was selected for case study. The region was divided into three parts and some indices were chosen to analyze the spatial pattern of landscape and its relationship with human activity, natural environment and landscape structure. The results show that:1 the highly developed area had a larger landscape diversity and nomogenity while the landscape dominance and fragmentation were less and water resources were more abundant in the aspect of natural conditions; 2 the farming land was the main landscape in the southern and middle regions of this area, but the degenerated landscape had a large scale and the degradation of ecological environment in middle and lower reaches would be aggravated in pace with the improvement of agricultural landscape in the bajada region.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1999年第1期211-217,共7页
Journal of Lanzhou University(Natural Sciences)
基金
国家九五重点攻关课题
关键词
内陆河流域
景观生态
空间格局
土地开发
黑河
inland river basin
landscape ecology
spatial pattern
land development
