地球科学进展 ›› 2019, Vol. 34 ›› Issue (4): 346 -355. doi: 10.11867/j.issn.1001-8166.2019.4.0346

地理与地理信息科学    下一篇

基于长时序 Landsat 5/8多波段遥感影像的青海湖面积变化研究
韩伟孝 1, 2( ),黄春林 1( ),王昀琛 1, 2,顾娟 3   
  1. 1. 中国科学院西北生态环境资源研究院,甘肃省遥感重点实验室,甘肃 兰州 730000
    2. 中国科学院大学,北京 100049
    3. 兰州大学 西部环境教育部重点实验室,甘肃 兰州 730000
  • 收稿日期:2018-11-16 修回日期:2018-12-06 出版日期:2019-04-10
  • 通讯作者: 黄春林 E-mail:hwx1012010362@163.com;huangcl@lzb.ac.cn
  • 基金资助:
    中国科学院战略性先导 A 类专项“地球大数据科学工程”(编号: XDA19040500);兰州大学西部环境教育部重点实验室开放基金“青海湖水体信息遥感提取”(lzujbky-2017-kl01)

Study on the Area Variation of Qinghai Lake Based on Long-Term Landsat 5/8 Multi-Band Remote Sensing Imagery

Weixiao Han 1, 2( ),Chunlin Huang 1( ),Yunchen Wang 1, 2,Juan Gu 3   

  1. 1. Key Laboratory of Remote Sensing of Gansu Province, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2018-11-16 Revised:2018-12-06 Online:2019-04-10 Published:2019-05-27
  • Contact: Chunlin Huang E-mail:hwx1012010362@163.com;huangcl@lzb.ac.cn
  • About author: Han Weixiao (1990-), male, Lanzhou City, Gansu Province, Ph.D student. Research areas include remote sensing big data.| Han Weixiao (1990-), male, Lanzhou City, Gansu Province, Ph.D student. Research areas include remote sensing big data.
  • Supported by:
    Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences " CASEarth Big Data Science Project"(No.XDA19040500);The Open Foundation of MOE Key Laboratory of Western China's Environmental System, Lanzhou University "Water information extraction of Qinghai Lake based on remote sensing images”(No.lzujbky-2017-kl01)

青海湖作为高海拔的内陆湖泊,其表面水体面积多年变化对寒旱区的气候变化和水循环至关重要。为了研究30年来青海湖湖泊面积变化规律,提取了1986—2017年(除去2012年)覆盖青海湖的459景Landsat 5/8影像,采用6种常用的水体提取方法分别提取了青海湖表面水体面积,并分析了不同方法的差异,最终分别对Landsat 5 TM和Landsat 8 OLI遥感影像采用改进的归一化差异水体指数(MNDWI)和水体指数2015(WI2015)方法获得1986—2017年青海湖表面水体面积的年变化,并分析其变化趋势。结果表明:1989—2003年青海湖面积减小了175.34 km2,年平均减小率为12.52 km2/a,2003—2017年青海湖面积增加了183.43 km2,年平均增加率为13.10 km2/a,整体上,1986—2017年青海湖面积增加了104.46 km2,年平均增加率为3.37 km2/a。

As a high-altitude inland lake, Qinghai Lake's annual change in surface water area is critical for climate change and water cycle in the cold and arid regions. In order to study the spatial and temporal variation of area of Qinghai Lake in the past 30 years, extract 459 images from Landsat 5/8 that covering Qinghai Lake from 1986 to 2017 (excluding 2012). Apply six common water extraction methods to extract the surface water area of ??Qinghai Lake and analyze the differences of methods. Finally, obtain the annual surface water area variation of Qinghai Lake from 1986 to 2017 by using MNDWI and WI2015 water extraction methods for Landsat5 TM and Landsat8 OLI images respectively, and analyze its variation trend. The results show that the area of ??Qinghai Lake decreased by 175.34 km2 from 1989 to 2003, and the average annual reduction rate was 12.52 km2/a . The area of ??Qinghai Lake increased by 183.43 km2 from 2003 to 2017, and the average annual increase rate was 13.10 km2/a. The area of ??Qinghai Lake increased by 104.46 km2, and the average annual increase rate was 3.37 km2/a from 1986 to 2017.

中图分类号: 

图1 青海湖位置示意图
Fig. 1 Location of Qinghai Lake
图2 19862017年每年的Landsat 5/8影像数
Fig. 2 The annual number of Landsat 5/8 imagery during 1986-2017
表1 Landsat 5/8 影像相关信息
Table 1 The related information of Landsat 5/8 imagery
表2 应用于 Landsat 5/8影像的 6种常用的水体指数
Table 2 Six water index methods applied in Landsat 5/8 imagery
表3 Landsat 5/8影像中波谱的波段信息
Table 3 Spectral bands information of Landsat 5/8 imagery
表4 用于验证的 Landsat 5/8影像信息
Table 4 The selected Landsat 5/8 imagery for validation
图3 Landsat 5/8影像提取19862017年青海湖表面水体面积流程图
Fig. 3 Flowchart of extracting surface water area of Qinghai Lake using Landsat 5/8 imagery during 1986-2017
图4 利用GEE平台计算得到的19862017年青海湖表面面积
Fig. 4 Surface water area of Qinghai Lake using GEE during 1986-2017
图5 6种方法提取青海湖表面水体边界图
Fig. 5 Boundary of surface water of Qinghai Lake using six methods
图6 19862017Landsat 5 TMLandsat 8 OLI青海湖表面水体面积变化
Fig. 6 Surface water area of Qinghai Lake from Landsat 5 TM and Landsat 8 OLI imagery during 1986-2017
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