基于ASTER-GDEM数据的浙东四明山地貌特征研究  

Geomorphic characteristics of the Siming Mountain(Zhejiang,China) based on ASTER-GDEM data analysis

作　　者：许锐 戴雪荣[1] 师育新[1] 郑丽波[2] 何姗姗 XU Rui;DAI Xue-rong;SHI Yu-xin;ZHENG Li-bo;HE Shan-shan(School of Geographic Sciences, East China Normal University, Shanghai 200241, China;Zhejiang Institute of Hydrogeology & Engineering Geology, Ningbo Zhejiang 315000, China)

机构地区：[1]华东师范大学地理科学学院,上海200241 [2]浙江省水文地质工程地质大队,浙江宁波315000

出　　处：《华东师范大学学报（自然科学版）》2018年第1期154-162,共9页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(41771017;41371214);浙江省余姚市旅游局委托项目

摘　　要：基于ASTER-GDEM数据,运用ArcGIS空间分析功能,通过地势起伏度、条带分析及面积-高程积分三种方法,探讨了浙江东部四明山山地地貌的形态特征.结果表明,四明山由于受断裂构造控制的影响,主体呈NE-SW向展布,中山、低山、丘陵和山麓平原的面积分别占0.6%、16.2%、32.7%和50.5%,山地起伏度较小(平均约81m).条带分析表明,山顶残存有多处面积大小不等的古夷平面,它们的高程与玄武岩台地的高程基本一致,南部高出北部约300 m.山地各子流域的面积-高程积分分析表明,HI值在0~0.35、0.35~0.45和0.45~0.60区间段分别占47.31%、30.58%和22.11%,分别对应老年期、壮年(偏老)期和壮年期的地貌发育阶段.山地目前主要受外力剥蚀的影响.Based on ASTER-GDEM data,the geomorphic characteristics of the Siming Mountain(Zhejiang,China)are analyzed using ArcGIS.Parameters describing local relief,the Swath profile and Hypsometric Integral(HI)are applied.The results show that the Siming Mountain of NE-SW is controlled by fault structures.Area occupied by mid-elevation mountain,low-elevation mountain,hill and foothill is0.6%,16.2%,32.7%,and50.5%respectively;the mid-and low elevation mountain have a low amplitude of relief(about81m).Swath profile analysis shows that the top of the Siming Mountain exhibits remnants of planation surface.When the planation surface was formed,the northeast activity was resurrected,which caused the basalt to cover it.The results show that the elevation of planation surface is close to the basalt elevation,whereby the southern parts of the mountain are higher by about300m than the north.The Hypsometric Integral analysis of each sub-basin reveals HI values are0–0.35,0.35–0.45and0.45–0.60,accounting for47.31%,30.58%and22.11%.In this paper,the geomorphological features of the study area are simply divided by the HI value.It is found that the HI values in the study area are less than0.6,and the landforms in the mature stage are subdivided according to elevation distribution in the EP chart,which are the older stage and the typical mature stage.The rest is corresponding to the old age of the landform,which indicates that the study area is now dominated by external force denudation.

关 键 词：ASTER-GDEM数据 面积-高程积分 地貌形态特征 四明山 

分 类 号：P931[天文地球—自然地理学]