雅鲁藏布江中游流域水土流失动态变化  

Soil and Water Loss Dynamics in Brahmaputra River Basin

作　　者：张琳[1] 何政伟[1] 陈晓杰[1] 李璇琼[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室地球科学学院,四川成都610059

出　　处：《地理空间信息》2011年第4期51-53,190,共3页Geospatial Information

基　　金：国家自然科学基金资助项目(40972225)

摘　　要：以雅鲁藏布江中游流域作为研究区域,运用遥感和地理信息系统技术对2000年、2005年、2009年3个时期的遥感影像处理并提取水土流失因子,通过转移概率矩阵对雅鲁藏布江中游流域的水土流失动态变化进行深入研究,并运用马尔科夫模型预测了2010年-2020年雅鲁藏布江中游流域水土流失变化情况。研究发现:2000年-2005年研究区水土流失强度呈逐步增强趋势,2005年-2009年水土流失强度呈逐步减轻趋势,说明2005年后水土流失情况已经有明显好转,从预测结果可以看出,雅鲁藏布江中游流域的水土流失将得到控制。Brahmaputra River basin was chose as a study area in this paper.Remote sensing and GIS technology were used to process remote sensing image of three periods in 2000,2005,2009 and extract soil and water loss factor.Soil and water loss dynamics in Brahmaputra River basin were studied deeply through the transition probability matrix.Markov model was used to predict dynamic changes of soil and water loss in Brahmaputra River basin.The result showed that the tend of soil and water loss was gradually increasing from 2000 to 2005,but the intensity was gradually reducing from 2005 to 2009.It indicated that the situation of soil and water loss had significantly improved since 2005.From the predicted results,soil and water loss in Brahmaputra River basin will be controlled.

关 键 词：马尔科夫模型 水土流失 转移概率矩阵 

分 类 号：P237.3[天文地球—摄影测量与遥感]