香港大屿山岛自然滑坡的空间分布与影响因子浅析

香港地处热带高温多雨强风化区，且地形陡峭，人类活动对自然环境的影响较大，导致滑坡灾害成为香港地区最主要的自然灾害之一。 许多针对香港滑坡的研究侧重于研究人工斜坡上发生的滑坡，由于自然滑坡难以调查，很少有人从区域的尺度来研究自然滑坡。然而，几十年的研究和调查表明，自然地表滑坡确实代表着一种自然灾害。大屿山岛是香港地区最大的离岛，保存着相对完整的自然状态，是研究香港地区自然滑坡的理想研究区。本文利用多年航片解译的滑坡数据，在应用地理信息系统技术的基础上，分析了大屿山岛自然地表滑坡的空间分布特征及滑坡与地形、地貌、地质、土地利用和植被等相关影响因子的关系。

Analysis of spatial distribution and contribution factors of natural landslides in Lantau Island of Hong Kong

Hong Kong is located in sub-tropical and humid area with extensive weathering. The steep natural hillsides and the influence of human activity on the natural environment have great contribution to the occurrence of natural landslides, which is one of the most damaging natural haz- ard in Hong Kong. There are many research focused on the landslides of artificial slope, but we can not find research on natural landslides from regional scale because of the difficulty of acquiring landslides data. Nevertheless, landslides on natural slopes over last few years have demonstrated that they do represent a hazard. Lantau Island, which is the largest outlining island of Hong Kong, and has a relatively origin natural environment, is a ideal pilot region for research on natural landslide. Landslides data utilized is interpreted from aerial photograph by GEO of Hong Kong government. Based on the geographical information system(GIS), the spatial distribution and the relationship be- tween natural landslides and their contributing factors in Lantau Island of Hong Kong are ana-lyzed.