Areal reduction factor: The effect of the return period

2019 ◽  
Author(s):  
C. Mineo ◽  
E. Ridolfi ◽  
A. Neri ◽  
F. Russo
Keyword(s):  
Return Period ◽  
Reduction Factor ◽  
Areal Reduction Factor

scholarly journals Scaling Characteristics of Storm-Centered ARF Using Radar Rainfall

10.29007/hmzf ◽  
2018 ◽  
Author(s):  
Eunji Kim ◽  
Boosik Kang
Keyword(s):  
Return Period ◽  
Reduction Factor ◽  
Exceedance Probability ◽  
Storm Events ◽  
Reference Area ◽  
Radar Rainfall ◽  
Areal Reduction Factor ◽  
Fixed Area ◽  
Spatio Temporal ◽  
Areal Rainfall

In the hydraulic design practices, it is necessary to apply areal reduction factor to convert the point rainfall into the areal rainfall in the reference area. The fixed-area ARF (ARFf), which is commonly used, can be considered unrealistic because it is estimated through independent frequency analysis of the point rainfall and the areal rainfall. In this study, storm-centred ARF (ARFs) was estimated using radar rainfall data to reflect the spatial distribution characteristics of storm events effectively. ARFs representing the duration and the return period was extracted by 95% non-exceedance probability of the Weibull distribution to derive envelope covering all values from various storm events. ARFs has a correlation with not only the reference area but also the duration and the return period. Their relationships are defined as the scaling factors. A new ARFs equation that reflects the spatio-temporal characteristics of actual rainfall is presented.

scholarly journals The derivation of areal reduction factor of storm rainfall from its scaling properties

2001 ◽  
Vol 37 (12) ◽  
pp. 3247-3252 ◽  
Author(s):  
Carlo De Michele ◽  
Nathabandu T. Kottegoda ◽  
Renzo Rosso
Keyword(s):  
Reduction Factor ◽  
Scaling Properties ◽  
Areal Reduction Factor ◽  
Storm Rainfall

Intercomparison of selected fixed-area areal reduction factor methods

2016 ◽  
Vol 537 ◽  
pp. 419-430 ◽  
Author(s):  
Sandra Pavlovic ◽  
Sanja Perica ◽  
Michael St Laurent ◽  
Alfonso Mejía
Keyword(s):  
Reduction Factor ◽  
Areal Reduction Factor ◽  
Fixed Area

On the derivation of the areal reduction factor of storms

1996 ◽  
Vol 42 (1-4) ◽  
pp. 123-135 ◽  
Author(s):  
Baldassare Bacchi ◽  
Roberto Ranzi
Keyword(s):  
Reduction Factor ◽  
Areal Reduction Factor

Review and Derivation of Areal Reduction Factor in Malaysia with Response to Changing Climate

2018 ◽  
Vol 22 (11) ◽  
pp. 4681-4698 ◽  
Author(s):  
Kahhoong Kok ◽  
Wansik Yu ◽  
Lariyah Mohd Sidek ◽  
Kwansue Jung
Keyword(s):  
Reduction Factor ◽  
Changing Climate ◽  
Areal Reduction Factor

scholarly journals On the use of radar reflectivity for estimation of the areal reduction factor

2006 ◽  
Vol 6 (3) ◽  
pp. 377-386 ◽  
Author(s):  
F. Lombardo ◽  
F. Napolitano ◽  
F. Russo
Keyword(s):  
Reduction Factor ◽  
Radar Reflectivity ◽  
Medium Size ◽  
Small Scale ◽  
Natural Phenomena ◽  
Radar Rainfall ◽  
Areal Reduction Factor ◽  
Empirical Relations ◽  
Urban Catchments ◽  
Areal Rainfall

Abstract. In order to estimate the rainfall fields over an entire basin raingauge, pointwise measurements need to be interpolated and the small-scale variability of rainfall fields can lead to biases in the rain rate estimation over an entire basin, above all for small or medium size mountainous and urban catchments. For these reasons, several raingauges should be installed in different places in order to determine the spatial rainfall distribution during the evolution of the natural phenomena over the selected area. In technical applications, many empirical relations are used in order to deduce heavy areal rainfall, when just one raingauge is available. In this work, we studied the areal reduction factor (ARF) using radar reflectivity maps collected with the Polar 55C, a C-band Doppler dual polarized coherent weather radar with polarization agility and with a 0.9° beamwidth. The radar rainfall estimates, for an area of 1 km2, were integrated for heavy rainfall with an upscaling process, until we had rainfall estimate for an area of 900 km2. The results obtained for a significant amount of data by using this technique are compared with the most important relations of the areal reduction factor reported in the literature.

scholarly journals The Estimation of Areal Reduction Factor(ARF) in Han-Rwer Basin

2002 ◽  
Vol 35 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Jong-Ho Jeong ◽  
Chang-Jin Na ◽  
Yong-Nam Yun
Keyword(s):  
Reduction Factor ◽  
Areal Reduction Factor
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