Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2017-715
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
09 Jan 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).
Critical scales to explain urban hydrological response
Elena Cristiano1, Marie-Claire ten Veldhuis1, Santiago Gaitan1,2, Susana Ochoa Rodriguez3, and Nick van de Giesen1 1Department of Water Management, Delft University of Technology, Postbox 5048, 2600 GA, Delft, The Netherlands
2Environmental Analytics, Innovation Engine BeNeLux, IBM, Amsterdam, The Netherlands
3RPS Water, Derby, UK
Abstract. Rainfall variability in space and time, in relation to catchment characteristics and model complexity, plays an important role in explaining the sensitivity of hydrological response in urban areas. In this work we present a new approach to classify rainfall variability in space and time and we use this classification to investigate rainfall aggregation effects on urban hydrological response. Nine rainfall events, measured with a Dual polarimetric X-Band radar at the CAESAR Site (Cabauw Experimental Site for Atmospheric Research, NL), were aggregated in time and space in order to obtain different resolution combinations. The aim of this work was to investigate the influence that rainfall and catchment scales have on hydrological response in urban areas. Three dimensionless scaling factors were introduced to investigate the interactions between rainfall and catchment scale and rainfall input resolution in relation to the performance of the model. Results showed that (1) rainfall classification based on cluster identification well represents the storm core, (2) aggregation effects are stronger for rainfall than flow, (3) model complexity does not have a strong influence compared to catchment and rainfall scales for this study case, (4) scaling factors allow to select the adequate rainfall resolution to obtain a given level of accuracy in the calculation of hydrological response.

Citation: Cristiano, E., ten Veldhuis, M.-C., Gaitan, S., Ochoa Rodriguez, S., and van de Giesen, N.: Critical scales to explain urban hydrological response, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-715, in review, 2018.
Elena Cristiano et al.
Elena Cristiano et al.
Elena Cristiano et al.

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Short summary
In this work we investigate the influence that rainfall and catchment scales have on hydrological response. This problem is quite relevant in urban areas, where the responst is fast due to the high degree of imperviusness. We presented a new approach to classify rainfall variability in space and time and we use this classification to investigate rainfall aggregation effects on urban hydrological response. This classification allows to identify the spatial extension of the main core of the storm.
In this work we investigate the influence that rainfall and catchment scales have on...
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