摘要
为探求呼伦湖水深分布及水下地形情况,以5组LandsatTM/ETM+影像数据及湖区分布的41个实测水深点为基础,应用太阳光波段及热红外辐射波段组合模型进行水深模拟,通过对模型验证及误差分析,得出最优模型为对数模型。进一步的敏感性分析表明,以波段6的敏感度为最大。应用最优模型对波段进行运算,反演效果较好,以2007-09-24为最优。其结果表明融入热红外辐射的多波段水深反演模型可适用于北方寒旱区水体。
In order to study the water depth and underwater terrain in the Hulun Lake, a composite model combining sunlight reflection band and thermal infrared radiation band has been developed based on the selected Landsat TM/ETM＋ and data of water depth measured at 41 points, and applied to predict water depth in the lake. The model verification and errors analysis were also carried out. It is proved that the logarithmic model is the optimal one, and the largest sensitivity appears in band 6 in the model. Computed spectral data were used in logarithmic model, and the results show that retrieval water depth is reasonable and the best consistent with the real terrain occurred in Sept. 24, 2007. With this study it is confirmed that the model is suitable to the cold and arid regions in North China.
出处
《水利学报》
EI
CSCD
北大核心
2011年第12期1423-1431,共9页
Journal of Hydraulic Engineering
基金
国家自然科学基金(50969005
40901262)
内蒙古自治区水利厅重点支持项目(20080105)
关键词
寒旱区
呼伦湖
水深
遥感
多波段反演模型
Cold and Arid Regions
Hulun Lake
water depth
remote sensing
multi-band retrieval model
