基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析

陈麒光; 邵兆刚; 韩建恩; 孟宪刚; 余佳; 王津

基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析

中国地质科学院地质力学研究所, 北京 100081

基金项目:

中国地质调查局地质调查项目"青藏高原气候变化湖泊沉积记录研究" 12120113006100

详细信息

作者简介:
陈麒光(1987-), 男, 硕士研究生, 主要从事区域地质与环境研究。E-mail:jj5279@sina.com

中图分类号: P542
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- 被引次数: 0
出版历程
- 收稿日期: 2014-05-14
- 刊出日期: 2014-09-01

ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 基于ASTER-GDEM数据, 运用GIS空间分析统计技术, 通过对数字地形高程、地表起伏度、地表坡度等地貌参数的统计和条带剖面及面积-高程积分等数字地貌分析, 结合前人的区域地质资料及野外实地调查和验证, 对藏南羊卓雍错地区的构造地貌特征进行了初步分析, 旨在为研究区的盆地地貌格局演化分析提供依据。研究结果表明, 研究区构造地貌总体为一近东西向盆地, 最高海拔7515 m, 最低海拔2581 m, 属于高海拔-极高海拔区域; 流域内以平原和丘陵地貌为主, 平均起伏度为314 m, 平均坡度19°, 地势起伏较小, 发育有三级层状地貌; 盆地边缘受断裂的控制, 构造现象发育, 线性影像特征明显。其东、西部分别受桑日-错那断陷带和亚东-露谷断陷带所围限, 具有多期构造活动特征。盆地南北两侧受绒布-哲古断裂和邛多江断裂控制较弱。受构造活动和地表水流综合作用的影响, 盆地内部地貌已进入老龄化阶段。
- ASTER-GDEM /
- 羊卓雍错 /
- 构造地貌 /
- 流域面积-高程积分
Abstract: The DEM data, gradually advancing, is applied widespreadly in the analysis of geomorphic. In order to provide important evidences for the tectonic pattern and evolution process of geomorphy in the study area, with detailed field survey and verification as well as searching and compare with former regional geologic data, the characteristics of tectonic geomorphy have been studied, based on data of ASTER-GDEM, the utilization of GIS spatial analysis statistic technology, statistics of geomorphic parameters including the terrain elevation(including the average elevation, the maximum elevation and the minimum elevation), the terrain fluctuation and the surface gradient, graphic and mathematic analysis of the strip profile and the area-elevation integral. The result shows that the study area, characterized by the EW directional basin geomorphy, with highest altitude of 7515 m and lowest altitude of 2581 m, belongs to the area of high-extremely high altitude, while areas within the watershed mainly exhibits geomorphy of plain and hill. With the average fluctuation of 314 m, average gradient of 19°, the terrain fluctuates little and shows layered geomorphy of three grades. The edge of the basin is controlled by faults, where tectonic phenomena develop with obvious characteristics of linear imagines. The east and west part are controlled by the Sangri-Cuona fault belt and the Yadong-Lugu fault belt respectively, in which multi-period tectonic activities are revealed by the elevation profile. Additionally, the south and north part of the watershed basin is controlled by the Rongbu-Zhegu fault and the Qiuduojiang fault, and the faulting in north is more intensive than that in south. Influenced by the combined action of tectonic activities and surface water flow, the geomorphy has entered the aging stage of evolution.
- ASTER-GDEM /
- Yamzho Yumco /
- geomorphologic /
- curve of hypsometric integral

HTML全文

图 1 羊卓雍错地区地质简图(据文献[8]略改)

Figure 1. Geological map in the YamzhoYumco region

下载: 全尺寸图片幻灯片

图 2 羊卓雍错地区DEM图

Figure 2. DEM image of the YamzhoYumco region

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图 3 羊卓雍错地区4种高程图

a-平均高程图；b-最大高程图；c-最小高程图；d-地势起伏度图

Figure 3. Four types of DEM maps of the YamzhoYumco region

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图 4 羊卓雍错地区地貌特征与湖相沉积

a-盆内丘陵地貌；b-盆内平原地貌及河流侵蚀V型谷；c-盆地边缘陡峭山体；d-高位湖相沉积(海拔4844m)

Figure 4. Geomorphologic characteristics of the YamzhoYumco region and it's lake sediments

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图 5 羊卓雍错地区坡度统计直方图

Figure 5. Slope statistics of the Yamzho Yumco region

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图 6 羊卓雍错地区坡度分级示意图

①-雅鲁藏布江构造带；②-桑日-错那断陷带；③-亚东-露谷断陷带；④-邛多江断裂；⑤-绒布-哲古断裂

Figure 6. Slope classification schematic diagram of the YamzhoYumco region

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图 7 羊卓雍错地区A、B、C条带剖面图

① 康马-羊八井-那曲断陷带；② 桑日-错那断陷带；③ 札达-拉孜-邛多江断裂；④ 绒布-古堆断裂；⑤ 雅鲁藏布构造带

Figure 7. Swath profile graph of the YamzhoYumco region

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图 8 羊卓雍错流域示意图

Figure 8. The YamzhoYumco watershed range diagram based on DEM

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图 9 羊卓雍错流域面积—高程积分曲线图

Figure 9. Curve of hypsometric integral in the YamzhoYumco watershed

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表 1 羊卓雍错地区高程统计

Table 1. Height statistics of the YamzhoYumco region

高程/m		百分比/%	累计百分比/%
< 3500(中海拔)		0.23	0.23
3500~5000(高海拔)	3500~4000	8.25	8.48
	4000~4500	19.42	27.90
	4500~5000	37.19	65.09
> 5000(极高海拔)		34.91	100.00

下载: 导出CSV

表 2 羊卓雍错地区地势起伏度统计

Table 2. Amplitude statistics of the YamzhoYumco region

起伏度划分/m	平原	丘陵	小起伏山地	中起伏山地	大起伏山地
起伏度划分/m	0~30	30~200	200~500	500~1000	1000~2500
百分比/%	2.45	22.83	62.44	12.10	0.18
累计百分比/%	2.45	25.28	87.72	99.82	100.00

下载: 导出CSV

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