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- W4234654160 abstract "Abstract. Microwave remote sensing offers emerging capabilities to monitor global hydrological processes. Instruments like the two dedicated soil moisture missions SMOS and HYDROS or the Advanced Scatterometer (ASCAT) onboard METOP will provide a flow of coarse resolution microwave data, suited for macro-scale applications. Only recently, the ERS scatterometer, which is the precursor instrument of ASCAT, has been used successfully to derive soil moisture information at global scale with a spatial resolution of 50 km. Concepts of how to integrate macro-scale soil moisture data in hydrologic models are however still vague. In fact, the coarse resolution of the data provided by microwave radiometers and scatterometers is often considered to impede hydrological applications. Nevertheless, even if most hydrologic models are run at much finer scales, radiometers and scatterometer allow monitoring of atmosphere-induced changes in regional soil moisture patterns. This may prove to be valuable information for modelling hydrological processes in large river basins (<10 000 km2. In this paper, ERS scatterometer derived soil moisture products are compared to measured runoff of the Zambezi River in south-eastern Africa for several years (1992–2000). This comparison serves as one of the first demonstrations that there is hydrologic relevant information in coarse resolution satellite data. The observed high correlations between basin-averaged soil moisture and runoff time series R2>0.85) clearly demonstrate that the seasonal change from low runoff during the dry season to high runoff during the wet season is well captured by the ERS scatterometer. Additionally, differences in runoff from year to year could be to some extend, explained by soil moisture anomalies." @default.
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- W4234654160 date "2005-03-02" @default.
- W4234654160 modified "2023-10-15" @default.
- W4234654160 title "Soil moisture-runoff relation at the catchment scale as observed with coarse resolution microwave remote sensing" @default.
- W4234654160 doi "https://doi.org/10.5194/hessd-2-417-2005" @default.
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