Abstract

Increasing accuracy of satellite altimetry water level retrievals, especially over rivers with seasonal ice cover, motivated the application of satellite observations for improving hydrodynamic models. Altimetric water level measurements are particularly valuable in areas with limited in situ data on river bed and floodplain topography as well as under conditions of insufficient data on water discharge and water level. The MIKE11 one-dimensional hydrodynamic model was adapted for the Lower Kolyma. The model was calibrated using the water level measurements at the Kolymskoe water gauge station located in the upper part of the reach. The verification of the simulated water levels against altimetry data was performed. The comparison of simulated and satellite-derived water levels at seven locations has shown that the model reproduces well the water level variability throughout the analyzed reach (167 km). The accuracy of the water level simulations as compared to the altimetric measurements varied from 0.20 to 2.75 m (or 13–62% of the seasonal amplitude).

中文翻译：

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根据建模和卫星测量得出的北极河流水位状况

摘要

卫星测高水位反演的准确性不断提高，特别是在有季节性冰盖的河流上，推动了卫星观测的应用，以改进水动力模型。在河床和洪泛区地形现场数据有限的地区以及在排水量和水位数据不足的情况下，高度水位测量特别有价值。 MIKE11 一维水动力模型适用于下科雷马河。该模型使用位于河段上部的 Kolymskoe 水位计站的水位测量值进行校准。根据测高数据对模拟水位进行了验证。对七个地点的模拟水位和卫星得出的水位进行比较表明，该模型很好地再现了整个分析河段（167 公里）的水位变化。与高度测量相比，水位模拟的精度在 0.20 到 2.75 m 之间变化（或季节性幅度的 13-62%）。