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Improving the applicability of gauge-based radar rainfall adjustment methods to urban pluvial flood modelling and forecasting using local singularity analysis
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Lipen Rodriguez, Susana Ochoa Willems, Patrick Onof, Christian |
| Copyright Year | 2014 |
| Abstract | Gauge-based radar rainfall adjustment techniques have been largely-used to improve the applicability of radar rainfall estimates to large-scale hydrological modelling. Their applicability to urban hydrology is however insufficient since these techniques were mostly developed based upon the Gaussian approximations and therefore smoothed off the so-called ‘singularity’ (or non-normality) that can be observed in the fine-scale rainfall structure. Overlooking the singularities could be critical because their distribution is highly consistent with that of local extreme magnitudes. This deficiency may cause tremendous errors in the subsequent urban hydrological modelling. In this paper, a methodology is proposed to incorporate an existing gauge-based radar rainfall adjustment technique with the local singularity analysis, aiming for improving the applicability of existing adjustment techniques at urban scales. Three historical storm events recorded by a flow survey campaign in 2011 in Edinburgh (UK) were selected as case study to evaluate the proposed methodology. The result suggests that the proposed ‘singularity-sensitive’ methodology can in general better re-construct the non-normality in local rainfall structure and at the same time preserve the advantage of the original adjustment techniques of generating unbiased estimates. |
| Starting Page | 1 |
| Ending Page | 10 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.raingain.eu/sites/default/files/wrah2014_lipen.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
