摘要
人为水土流失是一种人类干扰下的典型景观退化现象 .将人为侵蚀在空间上的表现称之为人为侵蚀景观 .在遥感和GIS技术支持下 ,结合大量的实地调查资料 ,对珠海最主要的人为侵蚀景观类型———土石场开展空间分布分析和景观生态影响评价 .调查范围内珠海土石场有 2 35个 ,其中三灶、井岸两镇(区 )分布最为集中 ,分别为 2 8、2 9个 .缓冲区分析表明 ,土石场的分布与距交通道路的远近呈对数线性相关 ,其中在距交通道路 10 0～ 2 0 0m距离范围内分布最为集中 .设计景观生态影响度评价指数 ,对面积大于5 0 0 0m2 的 15 2个土石场进行景观生态影响度评价结果表明 ,对周边景观生态环境影响极强的土石场有9个 ,属于强一级的有 17个 。
Artificial erosion is one of the typical artificial landscape degradation. Based on the support of GIS and RS and combined with field investigation data, the spatial distribution characteristics and landscape ecological impact degree of quarry were analyzed. There were 235 quarries in Zhuhai city, which concentrated on Sanzao town and Jingan town. According to buffer analysis, the quarries distribution had a obviously logarithm relationship with its distances from roads. 152 quarries with the area of more than 5000 m 2 were assessed by landscape ecological impact degree (LEI) index. The results indicated that 9 quarries belonged to great influence level and 19 quarries belonged to strong influence on ecological environment.
出处
《应用生态学报》
CAS
CSCD
2004年第2期283-286,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重大项目 ( 3 98993 70 )
广东省科技攻关项目( 2 0 0 2C3 15 17
2 0 0 2C3 2 2 0 3 )
广东省自然科学基金资助项目( 0 3 12 88)
关键词
人为侵蚀
土石场
空间分布
景观生态影响度
Artificial erosion, Quarry, Spatial distribution, Landscape ecological impact degree.
