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Geodynamic processes in the Himalayas. Inverse calibration attempt of Remote Sensing data by in-situ determination, numerical- and analog modelling

Abstract : Climate, tectonic uplift, erosion and landscape morphology are key issues for the global understanding of environmental processes. Extreme and hardly accessible terrain in the High Himalayas make field studies on a large scale impossible. Here, we present an integrative approach of several remote sensing techniques in combination with field studies, task oriented experimental simulation and numeric modeling to provide the necessary tools to understand the coupling processes. The present scientific status of remote sensing techniques within the geomorphological research community is rather a supportive than an independent sector. The field of remote sensing is now facing a metamorphosis, from an epoch where image processing prevailed now to a new era where physical measurements are being obtained. In other words remote sensing not only provides images that are statistically analyzed (e.g. classi?cations) but can also deliver absolute measurements of specific physical properties of a reflector (e.g. temperature, dielectric constant, slope, precipitation, etc.). New remote sensing technologies have the capability of measuring physical parameters, such as precipitation, landuse, vegetation coverage, soil moisture and tectonic uplift with a area wide coverage and an high spatial resolution. Integrated experimental simulations can provide insights on the principal properties and the coherence of the parameter. In theory landscapes evolution depends on the coupling feedbacks effects, e.g. when erosion does not compensate uplift. So far no physical demonstration supports the empirical approach based on intuitive assumptions concerning geomorphological processes. Additionally, expert knowledge in experimental simulation and the recent advances in numeric modeling provide the tools to understand coupling processes. The integration of remote sensing measurements numeric models and experimental simulations will allow us to quantify the acting process in a very new way. Numeric modeling on the basis of the principle properties from experimental simulations and with area wide remotely acquired parameter input will provide a powerful tool to understand the acting processes in the Himalayas and thus in high mountain areas.
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Contributor : Isabelle Dubigeon <>
Submitted on : Thursday, April 16, 2009 - 1:42:26 PM
Last modification on : Friday, April 5, 2019 - 8:03:16 PM

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  • HAL Id : insu-00375931, version 1

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C. Andermann, R. Gloaguen, Stéphane Bonnet. Geodynamic processes in the Himalayas. Inverse calibration attempt of Remote Sensing data by in-situ determination, numerical- and analog modelling. matgeos 2008, Apr 2008, Freiberg, Germany. ⟨insu-00375931⟩

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