A Study Of Earth's Surficial Processes Base On DEM Spatial Analysis

In recent years, researches on orogenic evolvement focused on the evidence of surficial process. All the studies have been becoming semi-quantitive and quantitive. And the key target of these studies is the carrier, i.e. landform, which recorded the crustal deformation and climate changes during geological time. Inaddition, the river drainage patterns and their implications for the plateau uplift and climate changing also have attracted more and more attentions than ever. Meanwhile, spatial analysis and applications of digital elevation model (DEM) were widely utilized in quantitive geomorphological researches, such as topographic analysis, paleosurface reconstruction and incision (erosion) analysis.The research on the earth's surficial processes by DEM spatial anlysis technical is belong to restrain tech of tectonics cause physiognormy geology and euthenics geology.select JILIN province as aim region, utilize the advanced GIS spacitial processing technical,from vary point view and differ relief paramerters to recover the topograghty shape and character, integrative analysis DEM data,associate with tectonics anlysis to recover the current topogragh and geology structions lithology cause of formation relation.using DEM data and geology map to rebuild Cenozoie key era by GIS spatial anlysis.and rebuild DEM of Pleistocene and holocene Paloc sediment surface,so as to get region eroded relief of Cenozoie time.base on it to step to explore macroscopical change of Cenozoie vary phases.(1)The principal topography modality of the Jilin province represents three rank,northwest declining and long wavelength landform character. Landform pattern was on the control of the earth tectonicm .and on the control of the surface corrasion and sedimentation in the corresponding period. (2) Through constructing old physiognomy surface and denudation quantum ration Convert research,for discussing the earth's surface course research which offer beneficial Complementarity. constructing old physiognomy surface and denudation quantum ration Convert research that can resolve region of the earth's surface denudation functionary equilibria adjust feedback functionary response etc key offer correlative science date(3)On the base of summarizing a great deal the correlation investigative about the country inside or abroad, the paper comparatively by the numbers expounds DEM of thegeologic apply, especially the pivotal worked analyze technique and flow on the research of structure physiognomy and river physiognomy , simultaneity it points out the application of DEM offers research angle and point with the development of macroscopic-quantitative physiognomy research.