济南市南部山区渗漏带汇水区景观恢复与优化

通过分析龙洞和渴马渗漏带所在汇水区地表景观格局,发现龙洞流域自然景观占优势,植被覆盖良好、景观聚集度高、林地破碎度低,景观空间布局合理;渴马流域虽然景观类型丰富、多样性高,但农田等半自然景观占优势,植被覆盖率低,景观聚集度低,而林地破碎度高,地表景观呈退化趋势。前者的景观格局明显优于后者。这两个流域都有地表水汇流、入渗的生态功能,地表景观格局的优劣影响到地表水源涵养和渗漏带入渗功能的发挥,因而龙洞渗漏带的渗漏功能好于渴马渗漏带。从熵值角度,通过两个流域间的比较分析找出了致使渴马流域景观格局不合理的驱动因素,继而提出了在该流域内的景观格局空间优化措施。

Landscape Restoration and Optimization in Water Infiltrating Area of Southern Jinan Mountain Region

By analyzing landscape patterns of Longdong watershed and Kema watershed,the study found that has special natural landscape the Longdong watershed involving good vegetation coverage,high congregation,low forest fragmentation,and rational landscape spatial distrabution.In contrast,although there is more landscape type and high diversity in Kema watershed,it is dominated by semi-natural landscape such as cropland,and it has low vegetation coverage,low congregation,high forest fragmentation.So Longdong watershed's landscape pattern is obviously better than Kema watershed.The two watersheds take on the ecological founction of collecting surface water and infiltrating.The condition of landscape pattern can greatly influence water resource conversation and the founction of infiltration,so the function of infiltration is stronger in Longdong watershed than in Kema watershed.From the theory of entropy,the article finds out driving forces which lead to irrational landscape patterns in Kema watershed by comparison between the two watersheds,and then it put out countermeasures aiming at optimizing the landscape pattern