抚仙湖流域地貌特征及其构造指示意义

程三友; 李英杰

抚仙湖流域地貌特征及其构造指示意义

程三友^1,,
李英杰²

1.
长安大学地球科学与资源学院, 陕西西安 710054
2.
陕西省环境科学研究设计院, 陕西西安 710061

基金项目:

长安大学校发展科技基金 07Z1503051001

国家技术发展计划项目 2009ZX07212-002

详细信息

作者简介:
程三友(1977-), 女, 博士, 讲师, 主要从事遥感地质学等方面的研究, E-mail:zysych@chd.edu.cn

中图分类号: P931.7
计量
- 文章访问数: 173
- HTML全文浏览量: 245
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2009-01-22
- 刊出日期: 2010-12-28

GEOMORPHOLOGY OF THE FUXIANHU DRAINAGE BASIN AND ITS STRUCTURAL IMPLICATION

CHENG San-you^1
,,
LI Ying-jie²

1.
School of Earth Sciences and Resourecs, Chang'an Universty, Xi'an 710054, China
2.
Shaanxi Provincical Academy of Environmental Science Research and Design, Xi'an 710061, China

摘要

摘要: 以数字高程模型数据为基础, 运用ArcGIS软件平台, 从数字高程模型数据中提取抚仙湖流域内相对独立的61个亚流域, 其中34个位于小江断裂东侧的山地中, 另外27个位于小江断裂西侧的山地中; 然后计算每一个流域单元流域的面积、周长、河流总长、形状指数、平均坡度、相对高差以及高程-面积积分值和水系分支比, 划分流域等级等。通过对流域地貌参数以及高程-面积积分值和分支比等的特征参数的详细分析, 初步表明抚仙湖两侧水系和亚流域的发育具有东西分异的特征。这些特征指示了抚仙湖水系两侧晚新生代构造活动的差异性, 反映了小江断裂带东西两侧的不均衡抬升。小江断裂带的活动控制了抚仙湖流域晚新生代快速隆起, 滇中高原快速隆起以及小江构造带内部差异活动是造成抚仙湖流域东西差异特征地貌的主要原因。
- 数字高程模型 /
- 地貌 /
- 高程-面积积分值 /
- 水系分支比
Abstract: We took adavage of ArcGIS software platform to obtain the data of geometrical shapes and boundaries of 61 sublevel individual watersheds in the Fuxianhu drainage With SRTM-DEM as the basic data, 34 in the ridges east to Xiaojiang fault, 27 in the ridges west to the Xiaojiang fault. Afterwards, we calculated the watershed areas, perimeters, river lengths, shape indexs, average slopes, relative height differences, elevation-area integral values, the drainage branching ratios and the level of the 61 watersheds. The results show some differences between the east and west ridges. These features indicates the difference in Late Cenozoic tectonic activity on both sides of the Fuxianhu drainage and reflects the uneven uplift on east and west sides of the Xiaojiang fault zone. The activity of the Xiaojiang fault zone imposed a control over the rapid uplift of the Fuxianhu drainage during the Late Cenozoic basin, and the rapid uplift of the Central Yunnan Plateau and the difference in activity of interior of the Xiaojiang fault zone are the leading factors causing the different topographies on east and west sides of the Fuxian drainage.
- digital elevation model (DEM) /
- geomorphology /
- the elevation-area integral values /
- the drainage branching ratios

HTML全文

图 1 抚仙湖流域地质略图

Figure 1. A sketch map of Fuxianhu drainage basin

下载: 全尺寸图片幻灯片

图 2 抚仙湖流域分布图

Figure 2. A map showing the distribution of the Fuxianhu drainage basin

下载: 全尺寸图片幻灯片

图 3 抚仙湖流域三维显示地貌图

Figure 3. 3D map of Fuxianhu drainage basin

下载: 全尺寸图片幻灯片

图 4 滇中高原及其周缘运动学模式(据Michael A. 2000^[7], 有修改)

Figure 4. Kinematic model of the central Yunnan Plateau and its adjacent regions (after Michael A, 2000^[7])

下载: 全尺寸图片幻灯片

表 1 抚仙湖流域亚盆地主要特征参数

Table 1. Characteristics of the sub-basins in the Fuxianhu drainage basin

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