Considering a large satellite dataset (i.e. ~16 years of ERS-2 and ENVISAT observations) we investigate the reliability of remotely-sensed data for calibrating a quasi-two dimensional (quasi-2D) hydraulic model of a ~140 km reach of the middle–lower portion of the Po river (Northern Italy), for which detailed topographical information and in-situ hydrometric data are available. In particular, we refer to traditional and remotely- sensed hydrometric data for: 1) evaluating if ERS-2 and ENVISAT data can be used for model calibration; 2) assessing whether remotely-sensed water elevation data can integrate traditional hydrometric data and improve the reliability of the hydraulicmodel. Satellite overpasses are generally characterized by lowfrequencies and the accuracy of remotely-sensed water surface levels is still limited. Nevertheless, the results of our analysis indicate that formedium-to-large rivers ERS-2 andENVISAT satellite data can effectively enhance our knowledge of the average streamflow regime of a given reach: they can be directly used in calibration, and their integration with in-situ data may significantly enhance the representation of the hydraulic behaviour of the study river. Considering our study reach, if compared to the model implemented on the basis of in-situ data only the hydraulic model parameterized on the basis of satellite and in-situ hydrometric data provides a better reproduction of average flow conditions, and it also results in the most accurate representation of the maximumwater profile observed during amajor flood occurred in October 2000.
Domeneghetti A., Tarpanelli A., Brocca L., Barbetta S., Moramarco T., Castellarin A., et al. (2014). The use of remote sensing-derived water surface data for hydraulic model calibration. REMOTE SENSING OF ENVIRONMENT, 149, 130-141 [10.1016/j.rse.2014.04.007].
The use of remote sensing-derived water surface data for hydraulic model calibration
DOMENEGHETTI, ALESSIO;CASTELLARIN, ATTILIO;BRATH, ARMANDO
2014
Abstract
Considering a large satellite dataset (i.e. ~16 years of ERS-2 and ENVISAT observations) we investigate the reliability of remotely-sensed data for calibrating a quasi-two dimensional (quasi-2D) hydraulic model of a ~140 km reach of the middle–lower portion of the Po river (Northern Italy), for which detailed topographical information and in-situ hydrometric data are available. In particular, we refer to traditional and remotely- sensed hydrometric data for: 1) evaluating if ERS-2 and ENVISAT data can be used for model calibration; 2) assessing whether remotely-sensed water elevation data can integrate traditional hydrometric data and improve the reliability of the hydraulicmodel. Satellite overpasses are generally characterized by lowfrequencies and the accuracy of remotely-sensed water surface levels is still limited. Nevertheless, the results of our analysis indicate that formedium-to-large rivers ERS-2 andENVISAT satellite data can effectively enhance our knowledge of the average streamflow regime of a given reach: they can be directly used in calibration, and their integration with in-situ data may significantly enhance the representation of the hydraulic behaviour of the study river. Considering our study reach, if compared to the model implemented on the basis of in-situ data only the hydraulic model parameterized on the basis of satellite and in-situ hydrometric data provides a better reproduction of average flow conditions, and it also results in the most accurate representation of the maximumwater profile observed during amajor flood occurred in October 2000.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
