Use of remotely sensed precipitation and leaf area index in a distributed hydrological model

J. Andersen, G. Dybkjær, Karsten Høgh Jensen, J.C. Refsgaard, K. Rasmussen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Remotely sensed precipitation from METEOSAT data and leaf area index (LAI) from NOAA AVHRR data is used as input data to the distributed hydrological modelling of three sub catchments (82.000 km(2)) in the Senegal River Basin. Further, root depths of annual vegetation are related to the temporal and spatial variation of LAI. The modelling results are compared with results based on conventional input of precipitation and vegetation characteristics. The introduction of remotely sensed LAI shows improvements in the simulated hydrographs, a marked change in the relative proportions of actual evapotranspiration comprising canopy evaporation, soil evaporation and transpiration. while no clear trend in the spatial pattern could be found, The remotely sensed precipitation resulted in similar model performances with respect to the simulated hydrographs as with the conventional raingauge input. A simple merging of the two inputs did not result in any improvement. (C) 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
JournalJournal of Hydrology
Volume264
Issue number1-4
Pages (from-to)34-50
ISSN0022-1694
DOIs
Publication statusPublished - 2002

Keywords

  • Leaf area index
  • Cold cloud duration
  • NOAA AVHRR
  • Remote sensing
  • Precipitation
  • Distributed hydrological modelling

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