森林草地转换对景观视觉效果的影响

基于景观保护的视点，定量研究了森林草地转换对景观视觉效果的影响．结果表明，中景域的可视区域比近景域和远景域大，草地建设对中景域景观视觉效果的影响也最大，因此，中景域是重要的景观保护对象．对草地内林地的可视量分析可知，各景域的可视林地多分布在400～600m高海拔上。25°以上的坡度范围内分布偏少．并探讨了草地建成后应采取的景观管理和保护对策，以增加草地景观的视觉效果．

Influence of conversion from forest to pasture on visual effect of landscape

Geographical information system (GIS) was applied to quantitatively evaluate the influence of conversion from forest to pasture on the visual effect of the landscape by the viewpoint of landscape conservation. The visible area of the intermediate zone was larger than that of both the near and far zones and hence, the influence of the conversion was the biggest on the visual effect of the intermediate zone. Therefore, intermediate zone is the most important part in landscape conservation. Analyses on the visibility of forest on the background of pasture showed that most parts of visible forest in all the zones located at elevations 400-600 m, but rarely distributed on slopes as steep as 25 degrees. The measures in landscape management and conservation were also discussed in the sense of increasing the visual effect of pasture landscape.