首页|青藏高原多尔索洞错水深反演与水量变化估算

青藏高原多尔索洞错水深反演与水量变化估算

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  • 国家科技期刊平台
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利用由实测水深空间插值获得的水下地形数据估算湖泊水量及其变化往往存在较大误差.以Landsat系列影像数据及多尔索洞错12m以下实测水深数据为基础,建立多波段组合模型进行水深模拟,结合多时相Landsat影像获取的多尔索洞错边界数据获取水深变化,估算1996～2016 年多尔索洞错水量变化.实验结果表明:多因子反演模型的相关系数(R2)均在0.90 以上,平均绝对误差低至0.48 m,相比空间插值方法能更精确地模拟多尔索洞错水深在12m以下区域的水深分布情况;近 20a来多尔索洞错不断扩张,水位升高约0.40 m/a,水量增加约0.18 km3/a.
Water depth inversion and water storage changes estimation of Duoersuodong Co in Tibetan Plateau
There is a larger error in estimating the lake water storage and change through the underwater topography data which is obtained from the spatial interpolation by using measured water depth points.A multi-band combination model was established based on the Landsat series image and the measured water depth data below 12 m of the Duoersuodong Co for water depth simula-tion.The change in lake depth was obtained by combining with multi-temporal Landsat images,and then the water storage change was estimated from 1996 to 2016.The results indicated that the correlation coefficients of all the multi-band combination models were above 0.90,and the average absolute error was as low as 0.48 m,especially since it has much higher accuracy than the spatial interpolation for waters deeper than 12 m.In the past 20 years,Duoersuodong Co has been expanding continuously,the increasing rate of water level was approximately 0.40 m/a,and the increasing rate of water storage was approximately 0.18 km3/a.

water depth inversionwater storage changenormalized difference water index(NDWI)multi-band combina-tion modelDuoersuodong Co

崔剑、乔宝晋、郭恒亮、杨洪

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河南省地质研究院,河南 郑州 450016

郑州大学 地球科学与技术学院,河南 郑州 450052

郑州大学 国家超级计算郑州中心,河南 郑州 450001

武汉大学 遥感信息工程学院,湖北 武汉 430072

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水深反演 水量变化 归一化水体指数法(NDWI) 多波段组合模型 多尔索洞错

青藏高原科学考察"湖泊演变及气候变化响应专题"项目(第二次)河南省科技重大专项

2019QZKK0202201400210100

2024

10.16232/j.cnki.1001-4179.2024.04.019

人民长江
水利部长江水利委员会

人民长江

CSTPCD北大核心
影响因子：0.451
ISSN：1001-4179
年,卷(期)：2024.55(4)
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