DOI: 10.1007/s00382-011-1054-9
Scopus记录号: 2-s2.0-84859005760
论文题名: Global off-line evaluation of the ISBA-TRIP flood model
作者: Decharme B. ; Alkama R. ; Papa F. ; Faroux S. ; Douville H. ; Prigent C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-07-08 起始页码: 1389
结束页码: 1412
语种: 英语
英文关键词: Evapotranspiration
; Floodplains
; Land surface hydrology
; River discharges
英文摘要: This study presents an off-line global evaluation of the ISBA-TRIP hydrological model including a two-way flood scheme. The flood dynamics is indeed described through the daily coupling between the ISBA land surface model and the TRIP river routing model including a prognostic flood reservoir. This reservoir fills when the river height exceeds the critical river bankfull height and vice versa. The flood interacts with the soil hydrology through infiltration and with the overlying atmosphere through precipitation interception and free water surface evaporation. The model is evaluated over a relatively long period (1986-2006) at 1° resolution using the Princeton University 3-hourly atmospheric forcing. Four simulations are performed in order to assess the model sensitivity to the river bankfull height. The evaluation is made against satellite-derived global inundation estimates as well as in situ river discharge observations at 122 gauging stations. First, the results show a reasonable simulation of the global distribution of simulated floodplains when compared to satellite-derived estimates. At basin scale, the comparison reveals some discrepancies, both in terms of climatology and interannual variability, but the results remain acceptable for a simple large-scale model. In addition, the simulated river discharges are improved in term of efficiency scores for more than 50% of the 122 stations and deteriorated for 4% only. Two mechanisms mainly explain this positive impact: an increase in evapotranspiration that limits the annual discharge overestimation found when flooding is not taking into account and a smoothed river peak flow when the floodplain storage is significant. Finally, the sensitivity experiments suggest that the river bankfull depth is potentially tunable according to the river discharge scores to control the accuracy of the simulated flooded areas and its related increase in land surface evaporation. Such a tuning could be relevant at least for climate studies in which the spatio-temporal variations in precipitation are generally poorly represented. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55334
Appears in Collections: 过去全球变化的重建
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作者单位: GAME-CNRM/CNRS - Météo-France, 42 av. G. Coriolis, 31057 Toulouse, France; NOAA-CREST, City College of New York, New York, NY, United States; CNRS/Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique, Observatoire de Paris, Paris, France; Institut de Recherche pour le Developpement IRD-LEGOS, Toulouse, France
Recommended Citation:
Decharme B.,Alkama R.,Papa F.,et al. Global off-line evaluation of the ISBA-TRIP flood model[J]. Climate Dynamics,2012-01-01,38(2017-07-08)