DOI: 10.5194/hess-20-2047-2016
Scopus记录号: 2-s2.0-84971291442
论文题名: HYPERstream: A multi-scale framework for streamflow routing in large-scale hydrological model
作者: Piccolroaz S ; , Di Lazzaro M ; , Zarlenga A ; , Majone B ; , Bellin A ; , Fiori A
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 5 起始页码: 2047
结束页码: 2061
语种: 英语
Scopus关键词: Atmospheric movements
; Catchments
; Climate models
; Computation theory
; Computational efficiency
; Dispersions
; Grid computing
; Groundwater
; Hydrology
; Rivers
; Routing protocols
; Runoff
; Stream flow
; Surveying
; Transfer functions
; Weather forecasting
; Continuous development
; Digital elevation model
; Ground-water hydrology
; Instantaneous unit hydrograph
; Large scale hydrological model
; Morphological information
; Multi-scale frameworks
; Rainfall-runoff modeling
; Network routing
; catchment
; climate modeling
; digital elevation model
; extreme event
; flow pattern
; geomorphological response
; hydrological modeling
; rainfall-runoff modeling
; river channel
; streamflow
; unit hydrograph
; weather forecasting
英文摘要: We present HYPERstream, an innovative streamflow routing scheme based on the width function instantaneous unit hydrograph (WFIUH) theory, which is specifically designed to facilitate coupling with weather forecasting and climate models. The proposed routing scheme preserves geomorphological dispersion of the river network when dealing with horizontal hydrological fluxes, irrespective of the computational grid size inherited from the overlaying climate model providing the meteorological forcing. This is achieved by simulating routing within the river network through suitable transfer functions obtained by applying the WFIUH theory to the desired level of detail. The underlying principle is similar to the block-effective dispersion employed in groundwater hydrology, with the transfer functions used to represent the effect on streamflow of morphological heterogeneity at scales smaller than the computational grid. Transfer functions are constructed for each grid cell with respect to the nodes of the network where streamflow is simulated, by taking advantage of the detailed morphological information contained in the digital elevation model (DEM) of the zone of interest. These characteristics make HYPERstream well suited for multi-scale applications, ranging from catchment up to continental scale, and to investigate extreme events (e.g., floods) that require an accurate description of routing through the river network. The routing scheme enjoys parsimony in the adopted parametrization and computational efficiency, leading to a dramatic reduction of the computational effort with respect to full-gridded models at comparable level of accuracy. HYPERstream is designed with a simple and flexible modular structure that allows for the selection of any rainfall-runoff model to be coupled with the routing scheme and the choice of different hillslope processes to be represented, and it makes the framework particularly suitable to massive parallelization, customization according to the specific user needs and preferences, and continuous development and improvements. © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78836
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil, Environmental, and Mechanical Engineering, University of Trento, via Mesiano 77, Trento, Italy; Department of Engineering, Roma Tre University, Via Vito Volterra 62, Rome, Italy
Recommended Citation:
Piccolroaz S,, Di Lazzaro M,, Zarlenga A,et al. HYPERstream: A multi-scale framework for streamflow routing in large-scale hydrological model[J]. Hydrology and Earth System Sciences,2016-01-01,20(5)