基于GIS空间分析模型的祁连山多年冻土研究

傅连珍; 胡道功; 张绪教; 游报捷; 吴泽群; 叶梦旎

基于GIS空间分析模型的祁连山多年冻土研究

1.
中国地质大学地球科学与资源学院, 北京 100083
2.
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“陆域天然气水合物分布特征及资源潜力评价(力学所)”项目( GZH201400304

详细信息

作者简介:
傅连珍(1990-), 女, 硕士研究生。主要从事第四纪地质和地理信息系统应用研究。E-mail:yesterdayfu@163.com

中图分类号: P642.14
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- 文章访问数: 144
- HTML全文浏览量: 78
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2015-03-25
- 刊出日期: 2015-09-01

STUDY ON PERMAFROST OF QILIAN MOUNTAINS BASED ON GIS SPATIAL ANALYSIS MODEL

1.
School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China
2.
Institute of Geomechanics, China Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 依据祁连山和青藏高原气温、地温、冻土厚度与经纬度以及海拔的经验公式, 通过ArcGIS空间分析, 获得了祁连山地区年均气温、年均地温和冻土厚度的空间分布规律。祁连山多年冻土区年均气温和年均地温分别为-12~-6 ℃和-4~-2 ℃, 多年冻土厚度变化于90~140 m之间。其中, 哈拉湖地区海拔4300 m以上的高山区温度最低、冻土最厚, 年均气温和年均地温分别低于-10 ℃和-4 ℃, 多年冻土厚度大于140 m。结合祁连山烃源岩区域分布特征和木里天然气水合物钻孔的冻土厚度资料, 认为中祁连盆-山构造地貌发育区为天然气水合物成藏最有利区域。
- 多年冻土 /
- GIS /
- DEM /
- 空间分析 /
- 天然气水合物 /
- 祁连山
Abstract: Based on those empirical formulas of temperature, permafrost thickness, latitude, longitude and altitude in Qilian Mountains and Tibet Plateau, the distribution characteristics of mean annual temperature, mean annual ground temperature and the thickness of permafrost in Qilian Mountains are obtained by ArcGIS spatial analysis model. The results show the average annual temperature and annual mean ground temperature of the permafrost regions in Qilian Mountains are in the range of -12~-6 ℃ and -4 ~-2 ℃ correspondingly, and the thickness of permafrost varies from 90 to 140 meters. The area with elevation above 4300 m around Hala Lake has the lowest temperature and the thickest permafrost. Its average annual temperature and ground temperature are lower than -10 ℃ and -4 ℃ respectively, and permafrost is thicker than 140 m. Combined with the distribution of hydrocarbon source rock and the permafrost thickness of gas hydrate drilling in Qilian Mountains, the middle of Qilian basin-mountain tectonic zone is believed to be the most favorable area for the gas hydrate reservoir.
- permafrost /
- GIS /
- DEM /
- spatial analysis model /
- gas hydrate /
- Qilian Mountains

HTML全文

图 1 祁连山地貌及冻土类型分布(冻土类型边界据文献[6])

Figure 1. Geomorphology and permafrost type distribution of Qilian Mountains

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图 2 冻土参数提取流程

Figure 2. The flow diagram of permafrost parameters extraction

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图 3 祁连山年均气温分布图(单位：℃)

Figure 3. Distribution of mean annual temperature in Qilian Mountains

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图 4 祁连山年均地温分布图(单位：℃)

Figure 4. Distribution of mean annual ground temperature in Qilian Mountains

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图 5 祁连山多年冻土厚度分布图(单位：m)

Figure 5. Distribution of permafrost thickness in Qilian Mountains

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