Development of highly accurate global polygonal drainage basin data

Masutomi, Yuji; Inui, Yusuke; Toko, Kiyoshi; Matsuoka, Yuzuru

doi:10.1002/hyp.7186

Cited by 83 publications

(44 citation statements)

References 10 publications

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“…This method is used to upscale a high-resolution flow direction map at 1 km (Global Drainage Basin Database, GBDB, Masutomi et al, 2009) into a coarse-resolution river network map, which is used in the global-scale river routing model. The SRTM30 digital elevation model (30 arc s DEM developed in the Shuttle Radar Topography Mission by NASA) is the DEM input for the FLOW method to derive the sub-grid scale topographic parameters.…”

Section: River Routing Cama-floodmentioning

confidence: 99%

Deriving global flood hazard maps of fluvial floods through a physical model cascade

Pappenberger

Dutra

Wetterhall

et al. 2012

Hydrol. Earth Syst. Sci.

201

177

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Abstract. Global flood hazard maps can be used in the assessment of flood risk in a number of different applications, including (re)insurance and large scale flood preparedness. Such global hazard maps can be generated using large scale physically based models of rainfall-runoff and river routing, when used in conjunction with a number of post-processing methods. In this study, the European Centre for Medium Range Weather Forecasts (ECMWF) land surface model is coupled to ERA-Interim reanalysis meteorological forcing data, and resultant runoff is passed to a river routing algorithm which simulates floodplains and flood flow across the global land area. The global hazard map is based on a 30 yr (1979-2010) simulation period. A Gumbel distribution is fitted to the annual maxima flows to derive a number of flood return periods. The return periods are calculated initially for a 25 × 25 km grid, which is then reprojected onto a 1 × 1 km grid to derive maps of higher resolution and estimate flooded fractional area for the individual 25 × 25 km cells. Several global and regional maps of flood return periods ranging from 2 to 500 yr are presented. The results compare reasonably to a benchmark data set of global flood hazard. The developed methodology can be applied to other datasets on a global or regional scale.

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Section: River Routing Cama-floodmentioning

confidence: 99%

Deriving global flood hazard maps of fluvial floods through a physical model cascade

Pappenberger

Dutra

Wetterhall

et al. 2012

Hydrol. Earth Syst. Sci.

201

177

View full text Add to dashboard Cite

show abstract

“…The flow direction map of the Global Drainage Basin Database (GDBD) at 1-km resolution (Masutomi et al, 2009) was used in this study as an input dataset. Each pixel of the GDBD flow direction map is assumed to have only one downstream direction toward one of the eight neighboring pixels (D8 form assumption).…”

Section: Data Usedmentioning

confidence: 99%

Deriving a global river network map and its sub-grid topographic characteristics from a fine-resolution flow direction map

Yamazaki

Oki

Kanae

2009

Hydrol. Earth Syst. Sci.

131

132

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Abstract. This paper proposes an improved method for converting a fine-resolution flow direction map into a coarseresolution river network map for use in global river routing models. The proposed method attempts to preserve the river network structure of an original fine-resolution map in the upscaling procedure, as this has not been achieved with previous upscaling methods. We describe an improved method in which a downstream cell can be flexibly located on any cell in the river network map. The improved method preserves the river network structure of the original flow direction map and allows automated construction of river network maps at any resolution. Automated construction of a river network map is helpful for attaching sub-grid topographic information, such as realistic river meanderings and drainage boundaries, onto the upscaled river network map. The advantages of the proposed method are expected to enhance the ability of global river routing models by providing ways to more precisely represent surface water storage and movement.

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“…Since the advent of digital elevation models (DEM), computational routines have been proposed that simplify the process in many ways and allow for at least semiautomatic procedures to delineate the pathways and drainage basins (e.g. Tarboton, 1991;Renssen and Knoop, 2000;Döll and Lehner, 2002). This has made routing runoff over a terrain a standard procedure in geographic information system applications.…”

Section: Introductionmentioning

confidence: 99%

“…When specific data are available for the region of interest, different types of refinements can be used to improve the model. Examples include the "stream burning" technique (Maidment, 1996;Renssen and Knoop, 2000), which can be used when data on observed river networks is available. Known locations of river networks are deepened in the original DEM to ensure runoff is collected in those paths.…”

Section: Introductionmentioning

confidence: 99%

“…Known locations of river networks are deepened in the original DEM to ensure runoff is collected in those paths. Information on human-built dams and reservoirs can be included to improve the predictions (Coe, 2000) and "ridge fencing" has recently been proposed as a method to include information on known high points and divides to separate drainage basins (Masutomi et al, 2009). Apart from the runoff direction, the temporal characteristics of runoff can be captured using network response functions (Gong et al, 2009), which include the effect of local short-term water storage.…”

Section: Introductionmentioning

confidence: 99%

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A dynamic continental runoff routing model applied to the last Northern Hemisphere deglaciation

et al. 2012

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Abstract. We describe and evaluate a dynamical continental runoff routing model for the Northern Hemisphere that calculates the runoff pathways in response to topographic modifications due to changes in ice thickness and isostatic adjustment. The algorithm is based on the steepest gradient method and takes as simplifying assumption that depressions are filled at all times and water drains through the lowest outlet points. It also considers changes in water storage and lake drainage in post-processing mode that become important in the presence of large ice dammed proglacial lakes. Although applicable to other scenarios as well, the model was conceived to study the routing of freshwater fluxes during the last Northern Hemisphere deglaciation. For that specific application we simulated the Northern Hemisphere ice sheets with an existing 3-D thermomechanical ice sheet model, which calculates changes in topography due to changes in ice cover and isostatic adjustment, as well as the evolution of freshwater fluxes resulting from surface ablation, iceberg calving and basal melt. The continental runoff model takes this input, calculates the drainage pathways and routes the freshwater fluxes to the surface grid points of an existing ocean model. This results in a chronology of temporally and spatially varying freshwater fluxes from the Last Glacial Maximum to the present day. We analyse the dependence of the runoff routing to grid resolution and parameters of the isostatic adjustment module of the ice sheet model.

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Development of highly accurate global polygonal drainage basin data

Cited by 83 publications

References 10 publications

Deriving global flood hazard maps of fluvial floods through a physical model cascade

Deriving global flood hazard maps of fluvial floods through a physical model cascade

Deriving a global river network map and its sub-grid topographic characteristics from a fine-resolution flow direction map

A dynamic continental runoff routing model applied to the last Northern Hemisphere deglaciation

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