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测绘学报  2015 

湖盆数据未知的湖泊动态库容遥感监测方法

DOI: 10.11947/j.AGCS.2015.20130438, PP. 309-315

Keywords: 湖泊,动态库容,遥感监测,湖盆数据

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Abstract:

针对现有库容遥感监测方法对无湖盆数据区域的湖泊动态库容难以直接测算问题,提出了未知湖泊水下地形数据的遥感湖泊动态库容监测方法.该方法通过多源遥感数据,匹配相对时相的湖泊面积和水位信息,构建并模拟湖盆DEM数据,据此来估算湖泊的动态库容.在算法实现上,首先采用分布迭代水体提取从遥感影像提取湖泊的多期动态边界;其次,从ICEsatGLAS激光测高数据中反演出湖泊的动态水位高程;第三,依据时间水位信息,通过邻近时相匹配,将水位高程赋给湖泊边界线,生成湖泊等水位线;第四,通过等水位线构建TIN(triangulatedirregularnetwork)和Kriging插值,得到模拟湖盆数字高程模型;最后,依据模拟湖盆DEM和水体面积分布、水位信息,计算湖泊动态库容.试验通过对博斯腾湖的多年动态库容监测与真实性检验,结果显示最大误差为2.21×108m3,最小误差为0.00002×108m3,平均误差为0.044×108m3,均方根为0.59,相关系数达到0.99.

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