DOI: 10.5194/hess-18-1895-2014
Scopus记录号: 2-s2.0-84901280735
论文题名: Testing the realism of a topography-driven model (FLEX-Topo) in the nested catchments of the Upper Heihe, China
作者: Gao H ; , Hrachowitz M ; , Fenicia F ; , Gharari S ; , Savenije H ; H ; G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 5 起始页码: 1895
结束页码: 1915
语种: 英语
Scopus关键词: Runoff
; Topography
; Classification approach
; Hydrological functions
; Hydrological models
; Hydrological process
; Information contents
; Model transferabilities
; Rainfall-runoff models
; Semi-distributed model
; Catchments
; catchment
; database
; elevation
; land cover
; landscape
; parameterization
; rainfall-runoff modeling
; topography
; China
; Heihe
; Heilongjiang
英文摘要: Although elevation data are globally available and used in many existing hydrological models, their information content is still underexploited. Topography is closely related to geology, soil, climate and land cover. As a result, it may reflect the dominant hydrological processes in a catchment. In this study, we evaluated this hypothesis through four progressively more complex conceptual rainfall-runoff models. The first model (FLEXL) is lumped, and it does not make use of elevation data. The second model (FLEXD) is semi-distributed with different parameter sets for different units. This model uses elevation data indirectly, taking spatially variable drivers into account. The third model (FLEXT0), also semi-distributed, makes explicit use of topography information. The structure of FLEXT0 consists of four parallel components representing the distinct hydrological function of different landscape elements. These elements were determined based on a topography-based landscape classification approach. The fourth model (FLEXT) has the same model structure and parameterization as FLEXT0 but uses realism constraints on parameters and fluxes. All models have been calibrated and validated at the catchment outlet. Additionally, the models were evaluated at two sub-catchments. It was found that FLEXT0 and FLEXT perform better than the other models in nested sub-catchment validation and they are therefore better spatially transferable. Among these two models, FLEXT performs better than FLEXT0 in transferability. This supports the following hypotheses: (1) topography can be used as an integrated indicator to distinguish between landscape elements with different hydrological functions; (2) FLEXT0 and FLEXT are much better equipped to represent the heterogeneity of hydrological functions than a lumped or semi-distributed model, and hence they have a more realistic model structure and parameterization; (3) the soft data used to constrain the model parameters and fluxes in FLEXT are useful for improving model transferability. Most of the precipitation on the forested hillslopes evaporates, thus generating relatively little runoff. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78240
Appears in Collections: 气候变化事实与影响
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作者单位: Water Resources Section, Delft University of Technology, Delft, Netherlands; Eawag: Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; Department of Environment and Agro-Biotechnologies, Centre de Recherche Public - Gabriel Lippmann, Belvaux, Luxembourg
Recommended Citation:
Gao H,, Hrachowitz M,, Fenicia F,et al. Testing the realism of a topography-driven model (FLEX-Topo) in the nested catchments of the Upper Heihe, China[J]. Hydrology and Earth System Sciences,2014-01-01,18(5)