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2013–2017年中巴经济走廊重点区域冰川冰湖分布数据集
A dataset of glacier and glacial lake distribution in key areas of the China-Pakistan Economic Corridor during 2013–2017
: 2018 - 09 - 11
: 2018 - 09 - 13
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摘要&关键词
摘要:中巴经济走廊范围内复杂的地貌地质、独特的水文气候条件以及丰富的高山积雪和冰川分布,为冰川灾害的发育提供了充分的物质条件。但由于地缘因素,在研究区进行野外调查、采集具体研究对象实测数据存在困难。通过遥感技术进行调查研究是获取该地区冰川冰湖变化和发展数据的重要手段。本文根据冰湖的定义并结合中巴经济走廊的建设范围,以冰湖编目及冰川灾害的相关研究为诉求,确定适用于本研究区的冰川与冰湖的界定与分类标准,以2013–2017年的Landsat8 OLI遥感影像为数据源,通过面向对象的分类方法,完成中巴经济走廊重点区域冰川及冰湖分类及分布数据集。研究区空间范围为34°–42°N,73°–82°E,包含了克勒青河、洪扎河、盖孜河及努布拉河等重点流域。相比传统方法,面向对象的分类方法在保证解译时效性的基础上提高了解译精度。长期、定时的冰川及冰湖监测可为中巴经济走廊的进一步建设提供数据支持,也对区域水资源变化、冰湖溃决危险性评估的科学决策支持具有重要意义。
关键词:中巴经济走廊;冰川;冰湖;面向对象
Abstract & Keywords
Abstract: The China–Pakistan Economic Corridor is characterized by complex landform and geology, unique hydrological and climate conditions, rich mountain snow and glacier of altogether, which altogether provide sufficient material conditions for ice disaster development. However, due to geographical factors, field investigation and on-site data collection are difficult to conduct. Remote sensing technology thus provides an important means to obtain data on the change and development of glacier and glacial lake in this region. We determined a classification standard to delimit glacier and glacial lake in the study area, based on the concept of glacial lake and the requirements of glacial lake cataloging and glacial calamity studies. The dataset of glacier and glacial lake distribution in key areas of the China-Pakistan Economic Corridor is built with an object-oriented approach based on the Landsat8 OLI images for 2013–2017. The data have a spatial scope between 34° to 42° latitude and 73° to 82° longitude approximately, covering Gaizi River Basin, Nubra Basin, Shaksgam River Basin, and Hunza River Basin in northern Pakistan. The object-oriented classification method can be used to improve the interpretation speed and accuracy compared with traditional methods. Long-term and regular monitoring of glacier and glacial lake in the areas can provide data support for further construction of the China–Pakistan Economic Corridor, as well as for scientific decision-making concerning regional water resource change and the risk assessment of glacial lake outburst.
Keywords: China–Pakistan Economic Corridor; glacier; glacial lake; object-oriented
稿件与作者信息
任彦润
renyanrun
张耀南
zhangyaonan
yaonan@lzb.ac.cn
出版历史
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中国科学数据
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