Impact of spatial and temporal resolution of rainfall inputs on urban hydrodynamic modelling outputs: A multi-catchment investigation

JOURNAL OF HYDROLOGY

卷:531

Article

Ochoa-Rodriguez, Susana¹  Wang, Li-Pen²  Gires, Auguste³  Pina, Rui Daniel¹  Reinoso-Rondinel, Ricardo⁴  Bruni, Guendalina⁵  Ichiba, Abdellah^3,6  Gaitan, Santiago⁵  Cristiano, Elena⁵  van Assel, Johan⁷  Kroll, Stefan⁷  Murla-Tuyls, Damian²  Tisserand, Bruno⁸  Schertzer, Daniel³  Tchiguirinskaia, Ioulia³  Onof, Christian¹  Willems, Patrick²  ten Veldhuis, Marie-Claire⁵ 

[1] Univ London Imperial Coll Sci Technol & Med, Dept Civil & Environm Engn, Urban Water Res Grp, Skempton Bldg, London SW7 2AZ, England

[2] Katholieke Univ Leuven, Hydraul Lab, B-3001 Heverlee, Leuven, Belgium

[3] Univ Paris Est, Ecole Ponts ParisTech, LEESU, F-77455 Marne La Vallee, France

[4] Delft Univ Technol, Fac Civil Engn & Geosci, Dept Geosci & Remote Sensing, NL-2600 GA Delft, Netherlands

[5] Delft Univ Technol, Fac Civil Engn & Geosci, Dept Water Management, NL-2600 GA Delft, Netherlands

[6] Conseil Gen Val de Marne, DSEA, F-94381 Bonneuil Sur Marne, France

[7] Aquafin NV, B-2630 Aartselaar, Belgium

[8] Veolia Environm Res & Innovat, F-78603 Maisons Laffitte, France

关键词: Urban hydrology;    Spatial-temporal resolution;    Radar rainfall;    X-band radar;    Urban drainage;    Hydrodynamic models;   

DOI  :  10.1016/j.jhydrol.2015.05.035

来源: Elsevier

【 摘 要 】

Urban catchments are typically characterised by high spatial variability and fast runoff processes resulting in short response times. Hydrological analysis of such catchments requires high resolution precipitation and catchment information to properly represent catchment response. This study investigated the impact of rainfall input resolution on the outputs of detailed hydrodynamic models of seven urban catchments in North-West Europe. The aim was to identify critical rainfall resolutions for urban catchments to properly characterise catchment response. Nine storm events measured by a dual-polarimetric X-band weather radar, located in the Cabauw Experimental Site for Atmospheric Research (CESAR) of the Netherlands, were selected for analysis. Based on the original radar estimates, at 100 m and 1 min resolutions, 15 different combinations of coarser spatial and temporal resolutions, up to 3000 m and 10 min, were generated. These estimates were then applied to the operational semi-distributed hydrodynamic models of the urban catchments, all of which have similar size (between 3 and 8 km(2)), but different morphological, hydrological and hydraulic characteristics. When doing so, methodologies for standardising model outputs and making results comparable were implemented. Results were analysed in the light of storm and catchment characteristics. Three main features were observed in the results: (1) the impact of rainfall input resolution decreases rapidly as catchment drainage area increases; (2) in general, variations in temporal resolution of rainfall inputs affect hydrodynamic modelling results more strongly than variations in spatial resolution; (3) there is a strong interaction between the spatial and temporal resolution of rainfall input estimates. Based upon these results, methods to quantify the impact of rainfall input resolution as a function of catchment size and spatial temporal characteristics of storms are proposed and discussed. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

【 授权许可】

Free