Definition of arsenic rock zone borderline and its classification
WANG Yuan-Chang-；Tun-Yong-Gong-；Kou-Quan-；Min-De-An-；Chang-Yu-Zhong-；Zhang-Rong-Jun
1.China National Administration Center for Seabuckthorn Development,100038,Beijing;2.Xifeng Soil and Water Conservation Institute,YRCC,745000,Qingyang,Gansu: China
Abstract：Taking the TM remote sensing data as the main information source,route survey and typical small watershed survey were used as the methods.Through massive field investigation,the image interpretion signs of different types of soft rock was established.With the supporting of geographic information system,by the meathod of computer assistanted artificial interpretion,the bordline of the soft rock was defined which mainly takes Shanxi,Shaanxi and Inner Mongolia contiguous area as its distribution center,and divided it into such three type areas as the exposed area,the loess covered area and the sand covered area.The distributive scope and the area size of each type have been determined.The result showed that the soft rock with the total area of 16 700 km2,of which exposed area 4 543.89 km2,sand covered area 3 709.18 km2,loess covered area 8 432.41 km2,separately accounts for the total area 27.2%,22.2% and 50.6%,areas of soft rock were defined.
王愿昌1；吴永红2；寇权2；闵德安2；常玉忠2；张绒君2. 砒砂岩分布范围界定与类型区划分[J]. 中国水土保持科学, 2007, 5(1): 14-18.
WANG Yuan-Chang-；Tun-Yong-Gong-；Kou-Quan-；Min-De-An-；Chang-Yu-Zhong-；Zhang-Rong-Jun. Definition of arsenic rock zone borderline and its classification. SSWCC, 2007, 5(1): 14-18.
2007, Vol. 5 
