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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hessd-12-6981-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
24 Jul 2015
Review status
This discussion paper has been under review for the journal Hydrology and Earth System Sciences (HESS). The manuscript was not accepted for further review after discussion.
Spatial characteristics of severe storms in Hong Kong
L. Gao and L. M. Zhang Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
Abstract. A storm may cause serious damage to infrastructures and public safety. The storm spatial distribution is an important piece of information in drainage system design and landslide hazard analysis. The primary objective of this paper is to quantify the spatial characteristics of three severe storms in Hong Kong. The maximum rolling 4, 24 and 36 h rainfall amounts of these storms are introduced firstly. Then the spatial structure of precipitation represented by semivariograms is analysed in both isotropic and anisotropic cases. Afterwards, the distribution of rainfall in spatial domain is assessed via surface trend fitting. Finally the spatial correlation of detrended residuals is determined through studying the scales of fluctuation along eight directions. The spatial distribution of the maximum rolling rainfall can be represented by a rotated ellipsoid trend surface and a random field of residuals. The principal directions of the surface trend are between 25 and 45°. The scales of fluctuation of the detrended residuals are found between 5 and 25 km according to the semivariograms and autocorrelation functions. The spatial correlations of the maximum rolling rainfall are affected by the rainfall duration. The scale of fluctuation becomes smaller as the rainfall duration increases. Such spatial characteristics are related to the local terrain and meteorology factors.

Citation: Gao, L. and Zhang, L. M.: Spatial characteristics of severe storms in Hong Kong, Hydrol. Earth Syst. Sci. Discuss., 12, 6981-7021, https://doi.org/10.5194/hessd-12-6981-2015, 2015.
L. Gao and L. M. Zhang
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C3227: 'Review comments for HESS-2015-204', Anonymous Referee #1, 22 Aug 2015 Printer-friendly Version 
AC C5449: 'Reply to reviewer 1', Limin Zhang, 06 Dec 2015 Printer-friendly Version 
 
RC C4761: 'HESSD-2015-204', Anonymous Referee #2, 09 Nov 2015 Printer-friendly Version 
AC C5459: 'Reply to reviewer 2', Limin Zhang, 06 Dec 2015 Printer-friendly Version 
L. Gao and L. M. Zhang
L. Gao and L. M. Zhang

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Short summary
A storm may cause serious damage to infrastructures and public safety. The objective of this paper is to quantify the spatial characteristics of three severe storms in Hong Kong. The spatial distribution of the maximum rolling rainfall is represented by a rotated ellipsoid trend surface and a random field of residuals. The principal directions of the surface trend are between 25° and 45°. The scales of fluctuation of the residuals along eight directions are found between 5 km and 25 km.
A storm may cause serious damage to infrastructures and public safety. The objective of this...
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