摘要
论文运用模糊c均值聚类(FCM)方法对蒙古高原风蚀危险度空间格局进行了研究。通过对植被覆盖率、地形起伏度、土壤干燥度和风场强度4个主要风蚀环境因子数据进行模糊聚类,结合专家知识,将蒙古高原风蚀危险度划分为6个等级。结果表明,FCM方法可有效地获取风蚀-环境关系知识,为预测性风蚀危险度制图提供依据;蒙古高原风蚀危险度表现为从东到西逐渐加强的空间格局,与NDVI和土壤干燥度的空间格局相似,说明水分条件和植被状况是决定蒙古高原风蚀危险的最主要因素,不同风蚀危险度分区结果与蒙古高原典型景观植被类型区域分布特征基本吻合。
The wind erosion environmental factors of Mongolia Plateau were derived and clustered using fuzzy clustering method （ FCM, fuzzy c-means clustering） , and then the knowledge of wind erosion-environment relationships was obtained through relating unique environmental combination classes to unique wind erosion type via the help of expert knowledge, finally the wind erosion hazard map was derived using the extracted wind erosion- environment knowledge and validated by remote sensing data of wind erosion intensity. The result indicated that wind erosion hazard became higher from south to west and from south to north in Mongolia Plateau and the approach is effective for obtaining wind erosion-environment relationship knowledge and predicting wind erosion mapping over areas without local wind erosion experts.
出处
《自然资源学报》
CSCD
北大核心
2009年第5期881-889,共9页
Journal of Natural Resources
基金
国家自然科学基金项目(40801105)
中国环境科学研究院中央级公益性科研院所基本科研业务专项资助项目(2007KYYW42)
2007年度环保公益性行业科研专项项目(200709008)
关键词
蒙古高原
风蚀危险度
模糊C均值聚类
Mongolian Plateau
wind erosion hazard
fuzzy c-means clustering
