LODEX : sémantisation & visualisation

Site exemple

Title

Rainfall-runoff modelling as a tool for constraining the re-analysis of daily precipitation and temperature fields in mountainous regions

Publication Year

2013

Author(s)
  • Le Moine, Nicolas
  • Hendrickx, Frederic
  • Gailhard, Joel
Conference
Symposium of H02m IAHS-IAPSO-IASPEI Assembly Date: JUL 22-26, 2013 Location: Gothenburg, SWEDEN
Source
COLD AND MOUNTAIN REGION HYDROLOGICAL SYSTEMS UNDER CLIMATE CHANGE: TOWARDS IMPROVED PROJECTIONS Bokk Series: IAHS Publication Volume: 360 Pages: 13-18 Published: 2013
ISSN
0144-7815
Abstract

Hydrological modelling in mountainous regions, where catchment hydrology is heavily influenced by snow (and possibly ice) processes, is a challenging task. The intrinsic complexity of local processes is added to the difficulty of estimating spatially-distributed inputs such as rainfall and temperature, which often exhibit a high spatial heterogeneity that cannot be fully captured by the measurement network. Hence, an interpolation step is often required prior to the hydrological modelling step. In most cases, the reconstruction of meteorological forcings and the calibration of the hydrological model are done sequentially. The outputs of the hydrological model (discharge estimates) may give some insight on the quality of the reconstructed forcings used to feed it, but in this two-step approach it is not possible to easily feed the interpolation scheme back with the discrepancies between observed and simulated discharges. Yet, despite having undergone the rainfall runoff (or snow runoff) transformation, discharge at the outlet of a (sub)catchment is still an interesting integrator (spatial low-pass filter) of the forcing fields and is an ancillary areal information complementing the direct, point-scale data collected at raingauges. In this perspective, choosing the best interpolation scheme partly becomes an inverse hydrological problem. In this study, we present a one-step calibration strategy where the parameters of both the interpolation model (i.e. reconstruction procedure of meteorological forcings) and of the hydrological model (i.e. snow cover evolution, soil moisture accounting, and flow routing schemes) are jointly inferred in a multi-site and multi-variable approach, using a multi-objective evolutionary algorithm. Interpolated fields are daily rainfall and temperature, whereas hydrological prognostic variables consist of discharge and snow water equivalent (SWE) time series at several locations in the 3600 km(2) Upper Durance River catchment (French Alps).

Author Keyword(s)
  • rainfall re-analysis
  • temperature reanalysis
  • geotatistics
  • rainfall-runoff modelling
  • multiobjective calibration
  • assimilation
KeyWord(s) Plus
    ESI Discipline(s)
    • Engineering
    • Environment/Ecology
    Web of Science Category(ies)
    • Water Resources
    Adress(es)

    [Le Moine, Nicolas] Univ Paris 06, UMR Sisyphe 7619, Paris, France

    Reprint Adress

    Le Moine, N (reprint author), Univ Paris 06, UMR Sisyphe 7619, Paris, France.

    Country(ies)
    • France
    CNRS - Adress(es)
    • Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), UMR7619
    Accession Number
    WOS:000324148900002
    uid:/M03CRT1N
    Powered by Lodex 8.18.5