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吴红波.基于星载雷达测高资料估计博斯腾湖水位-水量变化研究水资源与水工程学报[J].,2019,30(3):9-16
基于星载雷达测高资料估计博斯腾湖水位-水量变化研究
Studies on changes in water level and storage of Bosten Lake based on satellite-borne radar altimetry data
  
DOI:10.11705/j.issn.1672-643X.2019.03.02
中文关键词:  湖泊水量  湖泊水位  星载  测高数据  激光雷达  博斯腾湖
英文关键词:lake storage  lake level  satellite-borne  altimetry data  light laser detection and ranging  Bosten Lake
基金项目:国家重点研发计划项目(2017YFC0404302); 国家自然科学基金青年项目(41601067); 中国博士后科学基金项目(2017M611011)
作者单位
吴红波1,2,3 (1.陕西理工大学 地理科学系 陕西 汉中 723000 2.西北大学陕西省地表系统与环境承载力重点实验室陕西 西安 710127 3.中国科学院青藏高原地球科学卓越创新中心 北京 100101) 
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中文摘要:
      为了理解气候变化背景下的内陆湖泊水位、面积、水量波动变化规律,科学合理地指导湖泊水资源利用与开发。利用1990-2015年Landsat TM/ETM/OLI影像和2002-2015年多源星载雷达测高资料,借助归一化水体指数(Normalized Difference Water Index,NDWI)提取博斯腾湖湖泊水域面积,结合湖泊水位观测数据,对星载雷达测高数据提取的湖面瞬时水位估计值进行对比与分析;根据湖泊面积与水位、水量与水位的关系式,构建湖泊面积-水位-水量波动时变序列,并探讨湖泊水位和水量变化的年际特征。结果表明:ICESat-GLAS、ENVISat&ERS、Jason-1&2的当日水位估计值与附近扬水站的水位观测值绝对误差分别小于0.21、0.18、0.15 m,而且具有较强的相关性和一致性。1990-2002年湖泊水位持续增长阶段;2002-2015年期间,湖泊水位持续下降。2015年湖泊水域面积比1990年减少了(32.20±3.5)km2,年均水位下降了(0.81±0.19)m,湖泊水量减少了(9.49±0.022)×108 m3。因此,湖泊水量变化为气候系统和人类活动的影响机制的理解提供了参考依据。
英文摘要:
      In order to understand the fluctuation change of water level, water surface area and water storage of inland lakes under the background of climate change, it is necessary to scientifically and rationally guide the utilization and development of lake water resources. The changes of Bosten lake water storage were estimated by the lake water area and water level that derived from the Landsat TM/ETM/OLI imagery and multi-mission satellite altimetry dataset, respectively. The Normalized Difference Water Index (NDWI) was used to extract the lake water area of Bosten Lake, and the lake surface water level was derived from the satellite-borne altimetry data. The observation data of the lake water level was employed to certify the satellite-derived water level. According to the correlation between lake area and water level, water storage and water level, the serial curves of lake water storage fluctuations was constructed. The inter-annual characteristics of water level and water storage change were also discussed. The results showed that the absolute errors of the derived-water level of ICESat-GLAS, ENVISat&ERS and Jason-1&2 were less than 0.21 m, 0.18 m and 0.15 m, respectively; and has strong correlation and consistency with each other. The lake level continued to increase from 1990 to 2002; however, it declined from 2002 to 2015. The lake water area in 2015 reduced by (32.20±3.5) km2 compared with 1990, the annual average water level in 2015 decreased by (0.81±0.19) m, and lake water volume in 2015 decreased by (0.949±0.022) billion m3. Therefore, the change of lake water storage provides a reference for understanding the impact mechanism of the climate system and human activities.
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