基于土壤数据和遥感影像的鄂尔多斯高原北部地貌分类(英文)

编号 zgly0001585835

文献类型 期刊论文

文献题名 基于土壤数据和遥感影像的鄂尔多斯高原北部地貌分类(英文)

作者 罗艳云  刘廷玺  王喜喜  段利民  张圣微  石军孝 

作者单位 CollegeofConservancyandCivilEngineering  InnerMongoliaAgriculturalUniversity  Hydraulics/WaterResourcesLaboratory  DepartmentofCivilandEnvironmentalEngineering  OldDominionUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2012年04期

年份 2012 

分类号 P931 

关键词 landformclassification  remotesensing  soilphysicalcharacteristic  logistic  topography  northernOrdosPlateau 

文摘内容 Landform classification is commonly done using topographic altitude only.However,practice indicates that locations at a same altitude may have distinctly different landforms,depending on characteristics of soils underneath those locations.The objectives of this study were to:1) develop a landform classification approach that is based on both altitude and soil characteristic;and 2) use this approach to determine landforms within a watershed located in northern Ordos Plateau of China.Using data collected at 134 out of 200 sampling sites,this study determined that D10(the diameter of soil particles 10% finer by weight) and long-term average soil moisture acquired in 2010,which can be estimated at reasonable accuracy from remote sensing imagery,can be used to represent soil characteristics of the study watershed.Also,the sampling data revealed that this watershed consists of nine classes of landforms,namely mobile dune(MD),mobile semi-mobile dune(SMD),rolling fixed semi-fixed dune(RFD),flat sandy land(FD),grassy sandy land(GS),bedrock(BR),flat sandy bedrock(FSB),valley agricultural land(VA),and swamp and salt lake(SW).A set of logistic regression equations were derived using data collected at the 134 sampling sites and verified using data at the remaining 66 sites.The verification indicated that these equations have moderate classification accuracy(Kappa coefficients > 43%).The results revealed that the dominant classes in the study watershed are FD(36.3%),BR(27.0%),and MD(23.5%),while the other six types of landforms(i.e.,SMD,RFD,GS,FSB,VA,and SW) in combination account for 13.2%.Further,the landforms determined in this study were compared with the classes pre-sented by a geologically-based classification map.The comparison indicated that the geo-logically-based classification could not identify multiple landforms within a class that are de-pendent upon soil characteristics.